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cdx-button--weight-quiet cdx-button--icon-only vector-toc-toggle"> <span class="vector-icon mw-ui-icon-wikimedia-expand"></span> <span>Toggle Questionnaire construction subsection</span> </button> <ul id="toc-Questionnaire_construction-sublist" class="vector-toc-list"> <li id="toc-Question_type" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Question_type"> <div class="vector-toc-text"> <span class="vector-toc-numb">3.1</span> <span>Question type</span> </div> </a> <ul id="toc-Question_type-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Question_sequence" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Question_sequence"> <div class="vector-toc-text"> <span class="vector-toc-numb">3.2</span> <span>Question sequence</span> </div> </a> <ul id="toc-Question_sequence-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Basic_rules_for_questionnaire_item_construction" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Basic_rules_for_questionnaire_item_construction"> <div class="vector-toc-text"> <span class="vector-toc-numb">3.3</span> <span>Basic rules for questionnaire item construction</span> </div> </a> <ul id="toc-Basic_rules_for_questionnaire_item_construction-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Multi-item_scales" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Multi-item_scales"> <div class="vector-toc-text"> <span class="vector-toc-numb">3.4</span> <span>Multi-item scales</span> </div> </a> <ul id="toc-Multi-item_scales-sublist" class="vector-toc-list"> </ul> </li> </ul> </li> <li id="toc-Questionnaire_administration_modes" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Questionnaire_administration_modes"> <div class="vector-toc-text"> <span class="vector-toc-numb">4</span> <span>Questionnaire administration modes</span> </div> </a> <ul id="toc-Questionnaire_administration_modes-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Questionnaire_translation" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Questionnaire_translation"> <div class="vector-toc-text"> <span class="vector-toc-numb">5</span> <span>Questionnaire translation</span> </div> </a> <ul id="toc-Questionnaire_translation-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Concerns_with_questionnaires" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Concerns_with_questionnaires"> <div class="vector-toc-text"> <span class="vector-toc-numb">6</span> <span>Concerns with questionnaires</span> </div> </a> <ul id="toc-Concerns_with_questionnaires-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-See_also" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#See_also"> <div class="vector-toc-text"> <span class="vector-toc-numb">7</span> <span>See also</span> </div> </a> <ul id="toc-See_also-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Further_reading" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Further_reading"> <div class="vector-toc-text"> <span class="vector-toc-numb">8</span> <span>Further reading</span> </div> </a> <ul id="toc-Further_reading-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-References" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#References"> <div class="vector-toc-text"> <span class="vector-toc-numb">9</span> <span>References</span> </div> </a> <ul id="toc-References-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-External_links" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#External_links"> <div class="vector-toc-text"> <span class="vector-toc-numb">10</span> <span>External links</span> </div> </a> <ul id="toc-External_links-sublist" class="vector-toc-list"> </ul> </li> </ul> </div> </div> </nav> </div> </div> <div class="mw-content-container"> <main id="content" class="mw-body"> <header class="mw-body-header vector-page-titlebar"> <nav aria-label="Contents" class="vector-toc-landmark"> <div id="vector-page-titlebar-toc" class="vector-dropdown vector-page-titlebar-toc vector-button-flush-left" title="Table of Contents" > <input type="checkbox" id="vector-page-titlebar-toc-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-page-titlebar-toc" class="vector-dropdown-checkbox " aria-label="Toggle the table of contents" > <label id="vector-page-titlebar-toc-label" for="vector-page-titlebar-toc-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--icon-only " aria-hidden="true" ><span class="vector-icon mw-ui-icon-listBullet mw-ui-icon-wikimedia-listBullet"></span> <span class="vector-dropdown-label-text">Toggle the table of contents</span> </label> <div class="vector-dropdown-content"> <div id="vector-page-titlebar-toc-unpinned-container" class="vector-unpinned-container"> </div> </div> </div> </nav> <h1 id="firstHeading" class="firstHeading mw-first-heading"><span class="mw-page-title-main">Questionnaire</span></h1> <div id="p-lang-btn" class="vector-dropdown mw-portlet mw-portlet-lang" > <input type="checkbox" id="p-lang-btn-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-p-lang-btn" class="vector-dropdown-checkbox mw-interlanguage-selector" aria-label="Go to an article in another language. Available in 39 languages" > <label id="p-lang-btn-label" for="p-lang-btn-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--action-progressive mw-portlet-lang-heading-39" aria-hidden="true" ><span class="vector-icon mw-ui-icon-language-progressive mw-ui-icon-wikimedia-language-progressive"></span> <span class="vector-dropdown-label-text">39 languages</span> </label> <div class="vector-dropdown-content"> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li class="interlanguage-link interwiki-ar mw-list-item"><a href="https://ar.wikipedia.org/wiki/%D8%A7%D8%B3%D8%AA%D8%A8%D8%A7%D9%86%D8%A9" title="استبانة – Arabic" lang="ar" hreflang="ar" data-title="استبانة" data-language-autonym="العربية" data-language-local-name="Arabic" class="interlanguage-link-target"><span>العربية</span></a></li><li class="interlanguage-link interwiki-ca mw-list-item"><a href="https://ca.wikipedia.org/wiki/Q%C3%BCestionari" title="Qüestionari – Catalan" lang="ca" hreflang="ca" data-title="Qüestionari" data-language-autonym="Català" data-language-local-name="Catalan" class="interlanguage-link-target"><span>Català</span></a></li><li class="interlanguage-link interwiki-cs badge-Q70893996 mw-list-item" title=""><a href="https://cs.wikipedia.org/wiki/Dotazn%C3%ADk" title="Dotazník – Czech" lang="cs" hreflang="cs" data-title="Dotazník" data-language-autonym="Čeština" data-language-local-name="Czech" class="interlanguage-link-target"><span>Čeština</span></a></li><li class="interlanguage-link interwiki-da mw-list-item"><a href="https://da.wikipedia.org/wiki/Sp%C3%B8rgeskema" title="Spørgeskema – Danish" lang="da" hreflang="da" data-title="Spørgeskema" data-language-autonym="Dansk" data-language-local-name="Danish" class="interlanguage-link-target"><span>Dansk</span></a></li><li class="interlanguage-link interwiki-de mw-list-item"><a href="https://de.wikipedia.org/wiki/Fragebogen" title="Fragebogen – German" lang="de" hreflang="de" data-title="Fragebogen" data-language-autonym="Deutsch" data-language-local-name="German" class="interlanguage-link-target"><span>Deutsch</span></a></li><li class="interlanguage-link interwiki-el mw-list-item"><a href="https://el.wikipedia.org/wiki/%CE%95%CF%81%CF%89%CF%84%CE%B7%CE%BC%CE%B1%CF%84%CE%BF%CE%BB%CF%8C%CE%B3%CE%B9%CE%BF" title="Ερωτηματολόγιο – Greek" lang="el" hreflang="el" data-title="Ερωτηματολόγιο" data-language-autonym="Ελληνικά" data-language-local-name="Greek" class="interlanguage-link-target"><span>Ελληνικά</span></a></li><li class="interlanguage-link interwiki-es mw-list-item"><a href="https://es.wikipedia.org/wiki/Cuestionario" title="Cuestionario – Spanish" lang="es" hreflang="es" data-title="Cuestionario" data-language-autonym="Español" data-language-local-name="Spanish" class="interlanguage-link-target"><span>Español</span></a></li><li class="interlanguage-link interwiki-eo mw-list-item"><a href="https://eo.wikipedia.org/wiki/Demandaro" title="Demandaro – Esperanto" lang="eo" hreflang="eo" data-title="Demandaro" data-language-autonym="Esperanto" data-language-local-name="Esperanto" class="interlanguage-link-target"><span>Esperanto</span></a></li><li class="interlanguage-link interwiki-eu mw-list-item"><a href="https://eu.wikipedia.org/wiki/Galdetegi" title="Galdetegi – Basque" lang="eu" hreflang="eu" data-title="Galdetegi" data-language-autonym="Euskara" data-language-local-name="Basque" class="interlanguage-link-target"><span>Euskara</span></a></li><li class="interlanguage-link interwiki-fa mw-list-item"><a href="https://fa.wikipedia.org/wiki/%D9%BE%D8%B1%D8%B3%D8%B4%E2%80%8C%D9%86%D8%A7%D9%85%D9%87" title="پرسش‌نامه – Persian" lang="fa" hreflang="fa" data-title="پرسش‌نامه" data-language-autonym="فارسی" data-language-local-name="Persian" class="interlanguage-link-target"><span>فارسی</span></a></li><li class="interlanguage-link interwiki-fr mw-list-item"><a href="https://fr.wikipedia.org/wiki/Questionnaire" title="Questionnaire – French" lang="fr" hreflang="fr" data-title="Questionnaire" data-language-autonym="Français" data-language-local-name="French" class="interlanguage-link-target"><span>Français</span></a></li><li class="interlanguage-link interwiki-ki mw-list-item"><a href="https://ki.wikipedia.org/wiki/Th%C4%A9gi" title="Thĩgi – Kikuyu" lang="ki" hreflang="ki" data-title="Thĩgi" data-language-autonym="Gĩkũyũ" data-language-local-name="Kikuyu" class="interlanguage-link-target"><span>Gĩkũyũ</span></a></li><li class="interlanguage-link interwiki-ko mw-list-item"><a href="https://ko.wikipedia.org/wiki/%EC%84%A4%EB%AC%B8%EC%A7%80" title="설문지 – Korean" lang="ko" hreflang="ko" data-title="설문지" data-language-autonym="한국어" data-language-local-name="Korean" class="interlanguage-link-target"><span>한국어</span></a></li><li class="interlanguage-link interwiki-hi mw-list-item"><a href="https://hi.wikipedia.org/wiki/%E0%A4%AA%E0%A5%8D%E0%A4%B0%E0%A4%B6%E0%A5%8D%E0%A4%A8%E0%A4%BE%E0%A4%B5%E0%A4%B2%E0%A5%80" title="प्रश्नावली – Hindi" lang="hi" hreflang="hi" data-title="प्रश्नावली" data-language-autonym="हिन्दी" data-language-local-name="Hindi" class="interlanguage-link-target"><span>हिन्दी</span></a></li><li class="interlanguage-link interwiki-id mw-list-item"><a href="https://id.wikipedia.org/wiki/Angket" title="Angket – Indonesian" lang="id" hreflang="id" data-title="Angket" data-language-autonym="Bahasa Indonesia" data-language-local-name="Indonesian" class="interlanguage-link-target"><span>Bahasa Indonesia</span></a></li><li class="interlanguage-link interwiki-it mw-list-item"><a href="https://it.wikipedia.org/wiki/Questionario" title="Questionario – Italian" lang="it" hreflang="it" data-title="Questionario" data-language-autonym="Italiano" data-language-local-name="Italian" class="interlanguage-link-target"><span>Italiano</span></a></li><li class="interlanguage-link interwiki-he mw-list-item"><a href="https://he.wikipedia.org/wiki/%D7%A9%D7%90%D7%9C%D7%95%D7%9F" title="שאלון – Hebrew" lang="he" hreflang="he" data-title="שאלון" data-language-autonym="עברית" data-language-local-name="Hebrew" class="interlanguage-link-target"><span>עברית</span></a></li><li class="interlanguage-link interwiki-kk mw-list-item"><a href="https://kk.wikipedia.org/wiki/%D0%90%D0%BD%D0%BA%D0%B5%D1%82%D0%B0" title="Анкета – Kazakh" lang="kk" hreflang="kk" data-title="Анкета" data-language-autonym="Қазақша" data-language-local-name="Kazakh" class="interlanguage-link-target"><span>Қазақша</span></a></li><li class="interlanguage-link interwiki-sw mw-list-item"><a href="https://sw.wikipedia.org/wiki/Dodoso" title="Dodoso – Swahili" lang="sw" hreflang="sw" data-title="Dodoso" data-language-autonym="Kiswahili" data-language-local-name="Swahili" class="interlanguage-link-target"><span>Kiswahili</span></a></li><li class="interlanguage-link interwiki-lv mw-list-item"><a href="https://lv.wikipedia.org/wiki/Anket%C4%93%C5%A1ana" title="Anketēšana – Latvian" lang="lv" hreflang="lv" data-title="Anketēšana" data-language-autonym="Latviešu" data-language-local-name="Latvian" class="interlanguage-link-target"><span>Latviešu</span></a></li><li class="interlanguage-link interwiki-hu mw-list-item"><a href="https://hu.wikipedia.org/wiki/K%C3%A9rd%C5%91%C3%ADv" title="Kérdőív – Hungarian" lang="hu" hreflang="hu" data-title="Kérdőív" data-language-autonym="Magyar" data-language-local-name="Hungarian" class="interlanguage-link-target"><span>Magyar</span></a></li><li class="interlanguage-link interwiki-mn mw-list-item"><a href="https://mn.wikipedia.org/wiki/%D0%90%D0%BD%D0%BA%D0%B5%D1%82%D1%8B%D0%BD_%D0%B0%D1%81%D1%83%D1%83%D0%BB%D0%B3%D0%B0" title="Анкетын асуулга – Mongolian" lang="mn" hreflang="mn" data-title="Анкетын асуулга" data-language-autonym="Монгол" data-language-local-name="Mongolian" class="interlanguage-link-target"><span>Монгол</span></a></li><li class="interlanguage-link interwiki-nl mw-list-item"><a href="https://nl.wikipedia.org/wiki/Vragenlijst" title="Vragenlijst – Dutch" lang="nl" hreflang="nl" data-title="Vragenlijst" data-language-autonym="Nederlands" data-language-local-name="Dutch" class="interlanguage-link-target"><span>Nederlands</span></a></li><li class="interlanguage-link interwiki-ja mw-list-item"><a href="https://ja.wikipedia.org/wiki/%E3%82%A2%E3%83%B3%E3%82%B1%E3%83%BC%E3%83%88" title="アンケート – Japanese" lang="ja" hreflang="ja" data-title="アンケート" data-language-autonym="日本語" data-language-local-name="Japanese" class="interlanguage-link-target"><span>日本語</span></a></li><li class="interlanguage-link interwiki-uz mw-list-item"><a href="https://uz.wikipedia.org/wiki/So%27rovnoma(anketa)" title="So'rovnoma(anketa) – Uzbek" lang="uz" hreflang="uz" data-title="So'rovnoma(anketa)" data-language-autonym="Oʻzbekcha / ўзбекча" data-language-local-name="Uzbek" class="interlanguage-link-target"><span>Oʻzbekcha / ўзбекча</span></a></li><li class="interlanguage-link interwiki-pl mw-list-item"><a href="https://pl.wikipedia.org/wiki/Kwestionariusz" title="Kwestionariusz – Polish" lang="pl" hreflang="pl" data-title="Kwestionariusz" data-language-autonym="Polski" data-language-local-name="Polish" class="interlanguage-link-target"><span>Polski</span></a></li><li class="interlanguage-link interwiki-pt mw-list-item"><a href="https://pt.wikipedia.org/wiki/Question%C3%A1rio" title="Questionário – Portuguese" lang="pt" hreflang="pt" data-title="Questionário" data-language-autonym="Português" data-language-local-name="Portuguese" class="interlanguage-link-target"><span>Português</span></a></li><li class="interlanguage-link interwiki-ro mw-list-item"><a href="https://ro.wikipedia.org/wiki/Chestionar" title="Chestionar – Romanian" lang="ro" hreflang="ro" data-title="Chestionar" data-language-autonym="Română" data-language-local-name="Romanian" class="interlanguage-link-target"><span>Română</span></a></li><li class="interlanguage-link interwiki-ru mw-list-item"><a href="https://ru.wikipedia.org/wiki/%D0%9C%D0%B5%D1%82%D0%BE%D0%B4_%D0%B0%D0%BD%D0%BA%D0%B5%D1%82%D0%B8%D1%80%D0%BE%D0%B2%D0%B0%D0%BD%D0%B8%D1%8F" title="Метод анкетирования – Russian" lang="ru" hreflang="ru" data-title="Метод анкетирования" data-language-autonym="Русский" data-language-local-name="Russian" class="interlanguage-link-target"><span>Русский</span></a></li><li class="interlanguage-link interwiki-sr mw-list-item"><a href="https://sr.wikipedia.org/wiki/%D0%90%D0%BD%D0%BA%D0%B5%D1%82%D0%B0" title="Анкета – Serbian" lang="sr" hreflang="sr" data-title="Анкета" data-language-autonym="Српски / srpski" data-language-local-name="Serbian" class="interlanguage-link-target"><span>Српски / srpski</span></a></li><li class="interlanguage-link interwiki-sv mw-list-item"><a href="https://sv.wikipedia.org/wiki/Enk%C3%A4t" title="Enkät – Swedish" lang="sv" hreflang="sv" data-title="Enkät" data-language-autonym="Svenska" data-language-local-name="Swedish" class="interlanguage-link-target"><span>Svenska</span></a></li><li class="interlanguage-link interwiki-tl mw-list-item"><a href="https://tl.wikipedia.org/wiki/Palatanungan" title="Palatanungan – Tagalog" lang="tl" hreflang="tl" data-title="Palatanungan" data-language-autonym="Tagalog" data-language-local-name="Tagalog" class="interlanguage-link-target"><span>Tagalog</span></a></li><li class="interlanguage-link interwiki-ta mw-list-item"><a href="https://ta.wikipedia.org/wiki/%E0%AE%B5%E0%AE%BF%E0%AE%A9%E0%AE%BE%E0%AE%95%E0%AF%8D%E0%AE%95%E0%AF%8A%E0%AE%A4%E0%AF%8D%E0%AE%A4%E0%AF%81" title="வினாக்கொத்து – Tamil" lang="ta" hreflang="ta" data-title="வினாக்கொத்து" data-language-autonym="தமிழ்" data-language-local-name="Tamil" class="interlanguage-link-target"><span>தமிழ்</span></a></li><li class="interlanguage-link interwiki-th mw-list-item"><a href="https://th.wikipedia.org/wiki/%E0%B9%81%E0%B8%9A%E0%B8%9A%E0%B8%AA%E0%B8%AD%E0%B8%9A%E0%B8%96%E0%B8%B2%E0%B8%A1" title="แบบสอบถาม – Thai" lang="th" hreflang="th" data-title="แบบสอบถาม" data-language-autonym="ไทย" data-language-local-name="Thai" class="interlanguage-link-target"><span>ไทย</span></a></li><li class="interlanguage-link interwiki-uk mw-list-item"><a href="https://uk.wikipedia.org/wiki/%D0%90%D0%BD%D0%BA%D0%B5%D1%82%D1%83%D0%B2%D0%B0%D0%BD%D0%BD%D1%8F" title="Анкетування – Ukrainian" lang="uk" hreflang="uk" data-title="Анкетування" data-language-autonym="Українська" data-language-local-name="Ukrainian" class="interlanguage-link-target"><span>Українська</span></a></li><li class="interlanguage-link interwiki-ur mw-list-item"><a href="https://ur.wikipedia.org/wiki/%D8%B3%D9%88%D8%A7%D9%84%D9%86%D8%A7%D9%85%DB%81" title="سوالنامہ – Urdu" lang="ur" hreflang="ur" data-title="سوالنامہ" data-language-autonym="اردو" data-language-local-name="Urdu" class="interlanguage-link-target"><span>اردو</span></a></li><li class="interlanguage-link interwiki-wuu mw-list-item"><a href="https://wuu.wikipedia.org/wiki/%E9%97%AE%E5%8D%B7%E8%B0%83%E6%9F%A5" title="问卷调查 – Wu" lang="wuu" hreflang="wuu" data-title="问卷调查" data-language-autonym="吴语" data-language-local-name="Wu" class="interlanguage-link-target"><span>吴语</span></a></li><li class="interlanguage-link interwiki-zh-yue mw-list-item"><a href="https://zh-yue.wikipedia.org/wiki/%E5%95%8F%E5%8D%B7%E8%AA%BF%E6%9F%A5" title="問卷調查 – Cantonese" lang="yue" hreflang="yue" data-title="問卷調查" data-language-autonym="粵語" data-language-local-name="Cantonese" class="interlanguage-link-target"><span>粵語</span></a></li><li class="interlanguage-link interwiki-zh mw-list-item"><a href="https://zh.wikipedia.org/wiki/%E5%95%8F%E5%8D%B7%E8%AA%BF%E6%9F%A5" title="問卷調查 – Chinese" lang="zh" hreflang="zh" data-title="問卷調查" data-language-autonym="中文" data-language-local-name="Chinese" 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class="mw-content-ltr mw-parser-output" lang="en" dir="ltr"><div class="shortdescription nomobile noexcerpt noprint searchaux" style="display:none">Series of questions for gathering information</div> <style data-mw-deduplicate="TemplateStyles:r1236090951">.mw-parser-output .hatnote{font-style:italic}.mw-parser-output div.hatnote{padding-left:1.6em;margin-bottom:0.5em}.mw-parser-output .hatnote i{font-style:normal}.mw-parser-output .hatnote+link+.hatnote{margin-top:-0.5em}@media print{body.ns-0 .mw-parser-output .hatnote{display:none!important}}</style><div role="note" class="hatnote navigation-not-searchable">For the racehorse, see <a href="/wiki/Questionnaire_(horse)" title="Questionnaire (horse)">Questionnaire (horse)</a>.</div> <figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/File:Questionaire_in_Thai.png" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/d/d0/Questionaire_in_Thai.png/250px-Questionaire_in_Thai.png" decoding="async" width="220" height="285" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/d/d0/Questionaire_in_Thai.png/330px-Questionaire_in_Thai.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/d/d0/Questionaire_in_Thai.png/500px-Questionaire_in_Thai.png 2x" data-file-width="1440" data-file-height="1866" /></a><figcaption>A basic questionnaire in <a href="/wiki/Thai_language" title="Thai language">Thai</a></figcaption></figure> <p>A <b>questionnaire</b> is a <a href="/wiki/Research" title="Research">research</a> instrument that consists of a set of <a href="/wiki/Question" title="Question">questions</a> (or other types of prompts) for the purpose of gathering <a href="/wiki/Information" title="Information">information</a> from respondents through survey or statistical study. A research questionnaire is typically a mix of close-ended questions and open-ended questions. Open-ended, long-term questions offer the respondent the ability to elaborate on their thoughts. The Research questionnaire was developed by the <a href="/wiki/Statistical_Society_of_London" class="mw-redirect" title="Statistical Society of London">Statistical Society of London</a> in 1838.<sup id="cite_ref-1" class="reference"><a href="#cite_note-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-2" class="reference"><a href="#cite_note-2"><span class="cite-bracket">[</span>2<span class="cite-bracket">]</span></a></sup> </p><p>Although questionnaires are often designed for <a href="/wiki/Statistics" title="Statistics">statistical</a> analysis of the responses, this is not always the case. </p><p>Questionnaires have advantages over some other types of <a href="/wiki/Statistical_survey" class="mw-redirect" title="Statistical survey">survey tools</a> in that they are cheap, do not require as much effort from the questioner as verbal or telephone surveys, and often have standardized answers that make it simple to compile data.<sup id="cite_ref-3" class="reference"><a href="#cite_note-3"><span class="cite-bracket">[</span>3<span class="cite-bracket">]</span></a></sup> However, such standardized answers may frustrate users as the possible answers may not accurately represent their desired responses.<sup id="cite_ref-4" class="reference"><a href="#cite_note-4"><span class="cite-bracket">[</span>4<span class="cite-bracket">]</span></a></sup> Questionnaires are also sharply limited by the fact that respondents must be able to read the questions and respond to them. Thus, for some <a href="/wiki/Demographic_group" class="mw-redirect" title="Demographic group">demographic groups</a> conducting a survey by questionnaire may not be concretely feasible.<sup id="cite_ref-5" class="reference"><a href="#cite_note-5"><span class="cite-bracket">[</span>5<span class="cite-bracket">]</span></a></sup> </p> <meta property="mw:PageProp/toc" /> <div class="mw-heading mw-heading2"><h2 id="History">History</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Questionnaire&action=edit&section=1" title="Edit section: History"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>One of the earliest questionnaires was <a href="/wiki/Dean_Milles%27_Questionnaire" class="mw-redirect" title="Dean Milles' Questionnaire">Dean Milles' Questionnaire</a> of 1753.<sup id="cite_ref-6" class="reference"><a href="#cite_note-6"><span class="cite-bracket">[</span>6<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading2"><h2 id="Types">Types</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Questionnaire&action=edit&section=2" title="Edit section: Types"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>A distinction can be made between questionnaires with questions that measure separate variables, and questionnaires with questions that are aggregated into either a scale or index. Questionnaires with questions that measure separate variables, could, for instance, include questions on: </p> <ul><li>preferences (e.g. political party)</li> <li>behaviors (e.g. food consumption)</li> <li>facts (e.g. gender)</li></ul> <p>Questionnaires with questions that are aggregated into either a scale or index include for instance questions that measure: </p> <ul><li>latent traits</li> <li>attitudes (e.g. towards immigration)</li> <li>an index (e.g. Social Economic Status)</li></ul> <div class="mw-heading mw-heading3"><h3 id="Examples">Examples</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Questionnaire&action=edit&section=3" title="Edit section: Examples"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li>A <a href="/wiki/Food_frequency_questionnaire" title="Food frequency questionnaire">food frequency questionnaire</a> (FFQ) is a questionnaire the type of diet consumed in people, and may be used as a research instrument. Examples of usages include assessment of intake of vitamins or toxins such as <a href="/wiki/Acrylamide" title="Acrylamide">acrylamide</a>.<sup id="cite_ref-7" class="reference"><a href="#cite_note-7"><span class="cite-bracket">[</span>7<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-8" class="reference"><a href="#cite_note-8"><span class="cite-bracket">[</span>8<span class="cite-bracket">]</span></a></sup></li></ul> <div class="mw-heading mw-heading2"><h2 id="Questionnaire_construction">Questionnaire construction</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Questionnaire&action=edit&section=4" title="Edit section: Questionnaire construction"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1236090951" /><div role="note" class="hatnote navigation-not-searchable">Main article: <a href="/wiki/Questionnaire_construction" title="Questionnaire construction">Questionnaire construction</a></div> <div class="mw-heading mw-heading3"><h3 id="Question_type">Question type</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Questionnaire&action=edit&section=5" title="Edit section: Question type"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Usually, a questionnaire consists of a number of questions (<a href="/wiki/Test_item" class="mw-redirect" title="Test item">test items</a>) that the respondent has to answer in a set format. A distinction is made between open-ended and closed-ended questions. An open-ended question asks the respondent to formulate his own answer, whereas a closed-ended question asks the respondent to pick an answer from a given number of options. The response options for a closed-ended question should be exhaustive and mutually exclusive. Four types of response scales for closed-ended questions are distinguished: </p> <ul><li>Dichotomous, where the respondent has two options. The dichotomous question is generally a "yes/no" close-ended question. This question is usually used in case of the need for necessary validation. It is the most natural form of a questionnaire.</li> <li>Nominal-polytomous, where the respondent has more than two unordered options. The nominal scale, also called the categorical variable scale, is defined as a scale used for labeling variables into distinct classifications and does not involve a quantitative value or order.</li> <li>Ordinal-polytomous, where the respondent has more than two ordered options</li> <li>(Bounded)Continuous, where the respondent is presented with a continuous scale</li></ul> <p>A respondent's answer to an open-ended question is coded into a response scale afterward. An example of an open-ended question is a question where the testee has to complete a sentence (sentence completion item).<sup id="cite_ref-Ader_9-0" class="reference"><a href="#cite_note-Ader-9"><span class="cite-bracket">[</span>9<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading3"><h3 id="Question_sequence">Question sequence</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Questionnaire&action=edit&section=6" title="Edit section: Question sequence"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>In general, questions should flow logically from one to the next. To achieve the best <a href="/wiki/Response_rate_(survey)" title="Response rate (survey)">response rates</a>, questions should flow from the least sensitive to the most sensitive, from the factual and behavioural to the attitudinal, and from the more general to the more specific.<sup class="noprint Inline-Template Template-Fact" style="white-space:nowrap;">[<i><a href="/wiki/Wikipedia:Citation_needed" title="Wikipedia:Citation needed"><span title="This claim needs references to reliable sources. (February 2022)">citation needed</span></a></i>]</sup> </p><p>There typically is a flow that should be followed when constructing a questionnaire in regards to the order that the questions are asked. The order is as follows: </p> <ol><li>Screens</li> <li>Warm-ups</li> <li>Transitions</li> <li>Skips</li> <li>Difficult</li> <li>Classification</li></ol> <p><b>Screens</b> are used as a screening method to find out early whether or not someone should complete the questionnaire. <b>Warm-ups</b> are simple to answer, help capture interest in the survey, and may not even pertain to research objectives. <b>Transition</b> questions are used to make different areas flow well together. <b>Skips</b> include questions similar to "If yes, then answer question 3. If no, then continue to question 5." <b>Difficult</b> questions are towards the end because the respondent is in "response mode." Also, when completing an online questionnaire, the progress bars lets the respondent know that they are almost done so they are more willing to answer more difficult questions. <b>Classification</b>, or demographic question should be at the end because typically they can feel like personal questions which will make respondents uncomfortable and not willing to finish survey.<sup id="cite_ref-10" class="reference"><a href="#cite_note-10"><span class="cite-bracket">[</span>10<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading3"><h3 id="Basic_rules_for_questionnaire_item_construction">Basic rules for questionnaire item construction</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Questionnaire&action=edit&section=7" title="Edit section: Basic rules for questionnaire item construction"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li>Use statements that are interpreted in the same way by members of different subpopulations of the population of interest.</li> <li>Use statements where persons that have different opinions or traits will give different answers.</li> <li>Think of having an "open" answer category after a list of possible answers.</li> <li>Use only one aspect of the construct you are interested in per item.</li> <li>Use positive statements and avoid negatives or double negatives.</li> <li>Do not make assumptions about the respondent.</li> <li>Use clear and comprehensible wording, easily understandable for all educational levels</li> <li>Use correct spelling, grammar and punctuation.</li> <li>Avoid items that contain more than one question per item (e.g. Do you like strawberries and potatoes?).</li> <li>Question should not be biased or even leading the participant towards an answer.</li> <li>Incorporate research questions like <a href="/wiki/MaxDiff" title="MaxDiff">MaxDiff</a> and <a href="/wiki/Conjoint" title="Conjoint">Conjoint</a> to help collect actionable data.<sup id="cite_ref-11" class="reference"><a href="#cite_note-11"><span class="cite-bracket">[</span>11<span class="cite-bracket">]</span></a></sup></li></ul> <div class="mw-heading mw-heading3"><h3 id="Multi-item_scales">Multi-item scales</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Questionnaire&action=edit&section=8" title="Edit section: Multi-item scales"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <figure typeof="mw:File/Thumb"><a href="/wiki/File:Multi-item_psychometric_scale.jpg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/3/38/Multi-item_psychometric_scale.jpg/500px-Multi-item_psychometric_scale.jpg" decoding="async" width="500" height="324" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/3/38/Multi-item_psychometric_scale.jpg/960px-Multi-item_psychometric_scale.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/3/38/Multi-item_psychometric_scale.jpg/1000px-Multi-item_psychometric_scale.jpg 2x" data-file-width="1459" data-file-height="944" /></a><figcaption>Labelled example of a multi-item <a href="/wiki/Psychometrics" title="Psychometrics">psychometric</a> <a href="/wiki/Scale_(social_sciences)" title="Scale (social sciences)">scale</a> as used in questionnaires<sup id="cite_ref-dx.doi.org_12-0" class="reference"><a href="#cite_note-dx.doi.org-12"><span class="cite-bracket">[</span>12<span class="cite-bracket">]</span></a></sup></figcaption></figure> <p>Within <a href="/wiki/Social_science" title="Social science">social science</a> research and practice, questionnaires are most frequently used to collect <a href="/wiki/Quantitative_research" title="Quantitative research">quantitative</a> data using multi-item <a href="/wiki/Scale_(social_sciences)" title="Scale (social sciences)">scales</a> with the following characteristics:<sup id="cite_ref-dx.doi.org_12-1" class="reference"><a href="#cite_note-dx.doi.org-12"><span class="cite-bracket">[</span>12<span class="cite-bracket">]</span></a></sup> </p> <ul><li>Multiple statements or questions (minimum ≥3; usually ≥5) are presented for each <a href="/wiki/Dependent_and_independent_variables" title="Dependent and independent variables">variable</a> being examined.</li> <li>Each statement or question has an accompanying set of equidistant response-points (usually 5–7).</li> <li>Each response point has an accompanying verbal anchor (e.g., "strongly agree") ascending from left to right.</li> <li>Verbal anchors should be balanced to reflect equal intervals between response-points.</li> <li>Collectively, a set of response-points and accompanying verbal anchors are referred to as a <a href="/wiki/Rating_scale" title="Rating scale">rating scale</a>. One very frequently-used rating scale is a <a href="/wiki/Likert_scale" title="Likert scale">Likert scale</a>.</li> <li>Usually, for clarity and efficiency, a single set of anchors is presented for multiple rating scales in a questionnaire.</li> <li>Collectively, a statement or question with an accompanying rating scale is referred to as an item.</li> <li>When multiple items measure the same variable in a <a href="/wiki/Reliability_(statistics)" title="Reliability (statistics)">reliable</a> and <a href="/wiki/Validity_(statistics)" title="Validity (statistics)">valid</a> way, they are collectively referred to as a multi-item scale, or a <a href="/wiki/Psychometrics" title="Psychometrics">psychometric</a> scale.</li> <li>The following types of reliability and validity should be established for a multi-item scale: <a href="/wiki/Internal_consistency" title="Internal consistency">internal reliability</a>, <a href="/wiki/Repeatability" title="Repeatability">test-retest reliability</a> (if the variable is expected to be stable over time), <a href="/wiki/Content_validity" title="Content validity">content validity</a>, <a href="/wiki/Construct_validity" title="Construct validity">construct validity</a>, and <a href="/wiki/Criterion_validity" title="Criterion validity">criterion validity</a>.</li> <li><a href="/wiki/Factor_analysis" title="Factor analysis">Factor analysis</a> is used in the scale development process.</li> <li>Questionnaires used to collect quantitative data usually comprise several multi-item scales, together with an introductory and concluding section.</li></ul> <div class="mw-heading mw-heading2"><h2 id="Questionnaire_administration_modes">Questionnaire administration modes</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Questionnaire&action=edit&section=9" title="Edit section: Questionnaire administration modes"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Main modes of questionnaire administration include:<sup id="cite_ref-Ader_9-1" class="reference"><a href="#cite_note-Ader-9"><span class="cite-bracket">[</span>9<span class="cite-bracket">]</span></a></sup> </p> <ul><li>Face-to-face questionnaire administration, where an interviewer presents the items orally.</li> <li>Paper-and-pencil questionnaire administration, where the items are presented on paper.</li> <li>Computerized questionnaire administration, where the items are presented on the computer.</li> <li>Adaptive computerized questionnaire administration, where a selection of items is presented on the computer, and based on the answers on those items, the computer selects the following items optimized for the testee's estimated ability or trait.</li></ul> <div class="mw-heading mw-heading2"><h2 id="Questionnaire_translation">Questionnaire translation</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Questionnaire&action=edit&section=10" title="Edit section: Questionnaire translation"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Questionnaires are translated from a <a href="/wiki/Source_language_(translation)" class="mw-redirect" title="Source language (translation)">source language</a> into one or more target languages, such as translating from English into Spanish and German. The process is not a mechanical word placement process. Best practice includes parallel translation, team discussions, and pretesting with real-life people,<sup id="cite_ref-13" class="reference"><a href="#cite_note-13"><span class="cite-bracket">[</span>13<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-14" class="reference"><a href="#cite_note-14"><span class="cite-bracket">[</span>14<span class="cite-bracket">]</span></a></sup> and is integrated in the model TRAPD (Translation, Review, Adjudication, Pretest, and Documentation).<sup id="cite_ref-:02_15-0" class="reference"><a href="#cite_note-:02-15"><span class="cite-bracket">[</span>15<span class="cite-bracket">]</span></a></sup> A theoretical framework is also provided by <a href="/wiki/Sociolinguistics" title="Sociolinguistics">sociolinguistics</a>, which states that to achieve the equivalent communicative effect as the source language, the translation must be linguistically appropriate while incorporating the social practices and cultural norms of the target language.<sup id="cite_ref-16" class="reference"><a href="#cite_note-16"><span class="cite-bracket">[</span>16<span class="cite-bracket">]</span></a></sup> </p><p>Besides translators, a team approach is recommended in the questionnaire translation process to include subject-matter experts and persons helpful to the process.<sup id="cite_ref-:02_15-1" class="reference"><a href="#cite_note-:02-15"><span class="cite-bracket">[</span>15<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-17" class="reference"><a href="#cite_note-17"><span class="cite-bracket">[</span>17<span class="cite-bracket">]</span></a></sup> For example, even when project managers and researchers do not speak the language of the translation, they know the study objectives well and the intent behind the questions, and therefore have a key role in improving questionnaire translation.<sup id="cite_ref-18" class="reference"><a href="#cite_note-18"><span class="cite-bracket">[</span>18<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading2"><h2 id="Concerns_with_questionnaires">Concerns with questionnaires</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Questionnaire&action=edit&section=11" title="Edit section: Concerns with questionnaires"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>While questionnaires are inexpensive, quick, and easy to analyze, often the questionnaire can have more problems than benefits. For example, unlike interviews, the people conducting the research may never know if the respondent understood the question that was being asked. Also, because the questions are so specific to what the researchers are asking, the information gained can be minimal.<sup id="cite_ref-19" class="reference"><a href="#cite_note-19"><span class="cite-bracket">[</span>19<span class="cite-bracket">]</span></a></sup> Often, questionnaires such as the <a href="/wiki/Myers-Briggs_Type_Indicator" class="mw-redirect" title="Myers-Briggs Type Indicator">Myers-Briggs Type Indicator</a>, give too few options to answer; respondents can answer either option but must choose only one response. Questionnaires also produce very low return rates, whether they are mail or online questionnaires. The other problem associated with return rates is that often the people who do return the questionnaire are those who have a very positive or a very negative viewpoint and want their opinion heard. The people who are most likely unbiased either way typically do not respond because it is not worth their time. </p><p>One key concern with questionnaires is that they may contain quite large measurement errors.<sup id="cite_ref-20" class="reference"><a href="#cite_note-20"><span class="cite-bracket">[</span>20<span class="cite-bracket">]</span></a></sup> These errors can be random or systematic. Random errors are caused by unintended mistakes by respondents, interviewers, and/or coders. Systematic error can occur if there is a systematic reaction of the respondents to the scale used to formulate the survey question. Thus, the exact formulation of a survey question and its scale is crucial, since they affect the level of measurement error.<sup id="cite_ref-21" class="reference"><a href="#cite_note-21"><span class="cite-bracket">[</span>21<span class="cite-bracket">]</span></a></sup> </p><p>Further, if the questionnaires are not collected using sound <a href="/wiki/Sampling_(statistics)" title="Sampling (statistics)">sampling</a> techniques, often the results can be non-representative of the population—as such a good sample is critical to getting representative results based on questionnaires.<sup id="cite_ref-22" class="reference"><a href="#cite_note-22"><span class="cite-bracket">[</span>22<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading2"><h2 id="See_also">See also</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Questionnaire&action=edit&section=12" title="Edit section: See also"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li><a href="/wiki/Survey_methodology" title="Survey methodology">Survey methodology</a></li> <li><a href="/wiki/Behavioral_Risk_Factor_Surveillance_System" title="Behavioral Risk Factor Surveillance System">Behavioral Risk Factor Surveillance System</a></li> <li><a href="/wiki/Computer-assisted_personal_interviewing" title="Computer-assisted personal interviewing">Computer-assisted personal interviewing</a></li> <li><a href="/wiki/Enterprise_Feedback_Management" class="mw-redirect" title="Enterprise Feedback Management">Enterprise Feedback Management</a></li> <li><a href="/wiki/Quantitative_marketing_research" title="Quantitative marketing research">Quantitative marketing research</a></li> <li><a href="/wiki/Questionnaire_construction" title="Questionnaire construction">Questionnaire construction</a></li> <li><a href="/wiki/Structured_interviewing" class="mw-redirect" title="Structured interviewing">Structured interviewing</a></li> <li><a href="/wiki/Web-based_experiments" title="Web-based experiments">Web-based experiments</a></li> <li><a href="/wiki/Position_analysis_questionnaire" title="Position analysis questionnaire">Position analysis questionnaire</a></li></ul> <div class="mw-heading mw-heading2"><h2 id="Further_reading">Further reading</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Questionnaire&action=edit&section=13" title="Edit section: Further reading"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li>Foddy, W. H. (1994). <i>Constructing questions for interviews and questionnaires: Theory and practice in social research</i> (New ed.). Cambridge, UK: Cambridge University Press.</li> <li>Gillham, B. (2008). <i>Developing a questionnaire</i> (2nd ed.). London, UK: Continuum International Publishing Group Ltd.</li> <li><style data-mw-deduplicate="TemplateStyles:r1238218222">.mw-parser-output cite.citation{font-style:inherit;word-wrap:break-word}.mw-parser-output .citation q{quotes:"\"""\"""'""'"}.mw-parser-output .citation:target{background-color:rgba(0,127,255,0.133)}.mw-parser-output .id-lock-free.id-lock-free a{background:url("//upload.wikimedia.org/wikipedia/commons/6/65/Lock-green.svg")right 0.1em center/9px no-repeat}.mw-parser-output .id-lock-limited.id-lock-limited a,.mw-parser-output .id-lock-registration.id-lock-registration a{background:url("//upload.wikimedia.org/wikipedia/commons/d/d6/Lock-gray-alt-2.svg")right 0.1em center/9px no-repeat}.mw-parser-output .id-lock-subscription.id-lock-subscription a{background:url("//upload.wikimedia.org/wikipedia/commons/a/aa/Lock-red-alt-2.svg")right 0.1em center/9px no-repeat}.mw-parser-output .cs1-ws-icon a{background:url("//upload.wikimedia.org/wikipedia/commons/4/4c/Wikisource-logo.svg")right 0.1em center/12px no-repeat}body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-free a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-limited a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-registration a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-subscription a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .cs1-ws-icon a{background-size:contain;padding:0 1em 0 0}.mw-parser-output .cs1-code{color:inherit;background:inherit;border:none;padding:inherit}.mw-parser-output .cs1-hidden-error{display:none;color:var(--color-error,#d33)}.mw-parser-output .cs1-visible-error{color:var(--color-error,#d33)}.mw-parser-output .cs1-maint{display:none;color:#085;margin-left:0.3em}.mw-parser-output .cs1-kern-left{padding-left:0.2em}.mw-parser-output .cs1-kern-right{padding-right:0.2em}.mw-parser-output .citation .mw-selflink{font-weight:inherit}@media screen{.mw-parser-output .cs1-format{font-size:95%}html.skin-theme-clientpref-night .mw-parser-output .cs1-maint{color:#18911f}}@media screen and (prefers-color-scheme:dark){html.skin-theme-clientpref-os .mw-parser-output .cs1-maint{color:#18911f}}</style><cite id="CITEREFLeung2001" class="citation journal cs1">Leung, W. C. (2001). "How to conduct a survey". <i>Student BMJ</i>. <b>9</b>: <span class="nowrap">143–</span>5.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=article&rft.jtitle=Student+BMJ&rft.atitle=How+to+conduct+a+survey&rft.volume=9&rft.pages=%3Cspan+class%3D%22nowrap%22%3E143-%3C%2Fspan%3E5&rft.date=2001&rft.aulast=Leung&rft.aufirst=W.+C.&rfr_id=info%3Asid%2Fen.wikipedia.org%3AQuestionnaire" class="Z3988"></span></li> <li><a href="/wiki/Gideon_J._Mellenbergh" title="Gideon J. Mellenbergh">Mellenbergh, G. J.</a> (2008). Chapter 10: Tests and questionnaires: Construction and administration. In <a href="/wiki/H._J._Ad%C3%A8r" class="mw-redirect" title="H. J. Adèr">H. J. Adèr</a> & G. J. Mellenbergh (Eds.) (with contributions by D. J. Hand), <i>Advising on research methods: A consultant's companion</i> (pp. 211–234). Huizen, The Netherlands: Johannes van Kessel Publishing.</li> <li><a href="/wiki/Gideon_J._Mellenbergh" title="Gideon J. Mellenbergh">Mellenbergh, G. J.</a> (2008). Chapter 11: Tests and questionnaires: Analysis. In <a href="/wiki/H._J._Ad%C3%A8r" class="mw-redirect" title="H. J. Adèr">H. J. Adèr</a> & G. J. Mellenbergh (Eds.) (with contributions by D. J. Hand), <i>Advising on research methods: A consultant's companion</i> (pp. 235–268). Huizen, The Netherlands: Johannes van Kessel Publishing.</li> <li>Munn, P., & Drever, E. (2004). <i>Using questionnaires in small-scale research: A beginner's guide</i>. Glasgow, Scotland: Scottish Council for Research in Education.</li> <li>Oppenheim, A. N. (2000). <i>Questionnaire design, interviewing and attitude measurement</i> (New ed.). London, UK: Continuum International Publishing Group Ltd.</li> <li>Robinson, M. A. (2018). Using multi-item psychometric scales for research and practice in human resource management. <i>Human Resource Management</i>, 57(3), 739–750. <a rel="nofollow" class="external free" href="https://dx.doi.org/10.1002/hrm.21852">https://dx.doi.org/10.1002/hrm.21852</a> (open-access)</li></ul> <p>Questionnaire are of different types as per Paul: 1)Structured Questionnaire. 2)Unstructured Questionnaire. 3)Open ended Questionnaire. 4)Close ended Questionnaire. 5)Mixed Questionnaire. 6)Pictorial Questionnaire. </p> <div class="mw-heading mw-heading2"><h2 id="References">References</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Questionnaire&action=edit&section=14" title="Edit section: References"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <style data-mw-deduplicate="TemplateStyles:r1239543626">.mw-parser-output .reflist{margin-bottom:0.5em;list-style-type:decimal}@media screen{.mw-parser-output .reflist{font-size:90%}}.mw-parser-output .reflist .references{font-size:100%;margin-bottom:0;list-style-type:inherit}.mw-parser-output .reflist-columns-2{column-width:30em}.mw-parser-output .reflist-columns-3{column-width:25em}.mw-parser-output .reflist-columns{margin-top:0.3em}.mw-parser-output .reflist-columns ol{margin-top:0}.mw-parser-output .reflist-columns li{page-break-inside:avoid;break-inside:avoid-column}.mw-parser-output .reflist-upper-alpha{list-style-type:upper-alpha}.mw-parser-output .reflist-upper-roman{list-style-type:upper-roman}.mw-parser-output .reflist-lower-alpha{list-style-type:lower-alpha}.mw-parser-output .reflist-lower-greek{list-style-type:lower-greek}.mw-parser-output .reflist-lower-roman{list-style-type:lower-roman}</style><div class="reflist"> <div class="mw-references-wrap mw-references-columns"><ol class="references"> <li id="cite_note-1"><span class="mw-cite-backlink"><b><a href="#cite_ref-1">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222" /><cite id="CITEREFGault,_RH1907" class="citation journal cs1">Gault, RH (1907). <a rel="nofollow" class="external text" href="https://zenodo.org/record/1430588">"A history of the questionnaire method of research in psychology"</a>. <i>Research in Psychology</i>. <b>14</b> (3): <span class="nowrap">366–</span>383. <a href="/wiki/Doi_(identifier)" class="mw-redirect" title="Doi (identifier)">doi</a>:<a rel="nofollow" class="external text" href="https://doi.org/10.1080%2F08919402.1907.10532551">10.1080/08919402.1907.10532551</a>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=article&rft.jtitle=Research+in+Psychology&rft.atitle=A+history+of+the+questionnaire+method+of+research+in+psychology&rft.volume=14&rft.issue=3&rft.pages=%3Cspan+class%3D%22nowrap%22%3E366-%3C%2Fspan%3E383&rft.date=1907&rft_id=info%3Adoi%2F10.1080%2F08919402.1907.10532551&rft.au=Gault%2C+RH&rft_id=https%3A%2F%2Fzenodo.org%2Frecord%2F1430588&rfr_id=info%3Asid%2Fen.wikipedia.org%3AQuestionnaire" class="Z3988"></span></span> </li> <li id="cite_note-2"><span class="mw-cite-backlink"><b><a href="#cite_ref-2">^</a></b></span> <span class="reference-text">A copy of the instrument was published in the <a href="/w/index.php?title=Journal_of_the_Statistical_Society&action=edit&redlink=1" class="new" title="Journal of the Statistical Society (page does not exist)">Journal of the Statistical Society</a>, Volume 1, Issue 1, 1838, pages 5–13. <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222" /><cite class="citation cs2"><i>Fourth Annual Report of the Council of the Statistical Society of London</i>, <a href="/wiki/JSTOR_(identifier)" class="mw-redirect" title="JSTOR (identifier)">JSTOR</a> <a rel="nofollow" class="external text" href="https://www.jstor.org/stable/i315562">i315562</a></cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=book&rft.btitle=Fourth+Annual+Report+of+the+Council+of+the+Statistical+Society+of+London&rft_id=https%3A%2F%2Fwww.jstor.org%2Fstable%2Fi315562%23id-name%3DJSTOR&rfr_id=info%3Asid%2Fen.wikipedia.org%3AQuestionnaire" class="Z3988"></span></span> </li> <li id="cite_note-3"><span class="mw-cite-backlink"><b><a href="#cite_ref-3">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222" /><cite class="citation journal cs1">"The Roma have a much younger population". <i>OECD Economic Surveys: 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SAGE Publications Ltd. <a href="/wiki/ISBN_(identifier)" class="mw-redirect" title="ISBN (identifier)">ISBN</a> <a href="/wiki/Special:BookSources/978-1-4739-5789-3" title="Special:BookSources/978-1-4739-5789-3"><bdi>978-1-4739-5789-3</bdi></a>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=book&rft.btitle=The+Translation+of+Measurement+Instruments+for+Cross-Cultural+Surveys+%28Chapter+19%29+in+The+SAGE+Handbook+of+Survey+Methodology&rft.pub=SAGE+Publications+Ltd&rft.date=2016&rft.isbn=978-1-4739-5789-3&rft.aulast=Behr&rft.aufirst=Dorothe&rft.au=Shishido%2C+Kuniaki&rft_id=https%3A%2F%2Fmethods.sagepub.com%2Fbook%2Fthe-sage-handbook-of-survey-methodology&rfr_id=info%3Asid%2Fen.wikipedia.org%3AQuestionnaire" class="Z3988"></span></span> </li> <li id="cite_note-18"><span class="mw-cite-backlink"><b><a href="#cite_ref-18">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222" /><cite id="CITEREFShaImmerwahr2018" class="citation journal cs1">Sha, Mandy; Immerwahr, Stephen (2018-02-19). <a rel="nofollow" class="external text" href="https://www.surveypractice.org/article/3248-survey-translation-why-and-how-should-researchers-and-managers-be-engaged">"Survey Translation: Why and How Should Researchers and Managers be Engaged?"</a>. <i>Survey Practice</i>. <b>11</b> (2): <span class="nowrap">1–</span>10. <a href="/wiki/Doi_(identifier)" class="mw-redirect" title="Doi (identifier)">doi</a>:<span class="id-lock-free" title="Freely accessible"><a rel="nofollow" class="external text" href="https://doi.org/10.29115%2FSP-2018-0016">10.29115/SP-2018-0016</a></span>. <a href="/wiki/S2CID_(identifier)" class="mw-redirect" title="S2CID (identifier)">S2CID</a> <a rel="nofollow" class="external text" href="https://api.semanticscholar.org/CorpusID:155857898">155857898</a>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=article&rft.jtitle=Survey+Practice&rft.atitle=Survey+Translation%3A+Why+and+How+Should+Researchers+and+Managers+be+Engaged%3F&rft.volume=11&rft.issue=2&rft.pages=%3Cspan+class%3D%22nowrap%22%3E1-%3C%2Fspan%3E10&rft.date=2018-02-19&rft_id=info%3Adoi%2F10.29115%2FSP-2018-0016&rft_id=https%3A%2F%2Fapi.semanticscholar.org%2FCorpusID%3A155857898%23id-name%3DS2CID&rft.aulast=Sha&rft.aufirst=Mandy&rft.au=Immerwahr%2C+Stephen&rft_id=https%3A%2F%2Fwww.surveypractice.org%2Farticle%2F3248-survey-translation-why-and-how-should-researchers-and-managers-be-engaged&rfr_id=info%3Asid%2Fen.wikipedia.org%3AQuestionnaire" class="Z3988"></span></span> </li> <li id="cite_note-19"><span class="mw-cite-backlink"><b><a href="#cite_ref-19">^</a></b></span> <span class="reference-text">Kaplan, R. M., & Saccuzzo, D. P. (2009). Psychological testing: Principles, applications, and issues. Belmont, CA: Wadsworth</span> </li> <li id="cite_note-20"><span class="mw-cite-backlink"><b><a href="#cite_ref-20">^</a></b></span> <span class="reference-text">Alwin, D. F. (2007). Margins of error: A study of reliability in survey measurement. Hoboken, Wiley</span> </li> <li id="cite_note-21"><span class="mw-cite-backlink"><b><a href="#cite_ref-21">^</a></b></span> <span class="reference-text">Saris, W. E. and Gallhofer, I. N. (2014). Design, evaluation, and analysis of questionnaires for survey research. Second Edition. Hoboken, Wiley.</span> </li> <li id="cite_note-22"><span class="mw-cite-backlink"><b><a href="#cite_ref-22">^</a></b></span> <span class="reference-text">Moser, Claus Adolf, and Graham Kalton. "Survey methods in social investigation." Survey methods in social investigation. 2nd Edition (1971).</span> </li> </ol></div></div> <div class="mw-heading mw-heading2"><h2 id="External_links">External links</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Questionnaire&action=edit&section=15" title="Edit section: External links"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <style data-mw-deduplicate="TemplateStyles:r1235681985">.mw-parser-output .side-box{margin:4px 0;box-sizing:border-box;border:1px solid #aaa;font-size:88%;line-height:1.25em;background-color:var(--background-color-interactive-subtle,#f8f9fa);display:flow-root}.mw-parser-output .side-box-abovebelow,.mw-parser-output .side-box-text{padding:0.25em 0.9em}.mw-parser-output .side-box-image{padding:2px 0 2px 0.9em;text-align:center}.mw-parser-output .side-box-imageright{padding:2px 0.9em 2px 0;text-align:center}@media(min-width:500px){.mw-parser-output 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href="mw-data:TemplateStyles:r1235681985" /><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1237033735" /><div class="side-box side-box-right plainlinks sistersitebox"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1126788409" /> <div class="side-box-flex"> <div class="side-box-image"><span class="noviewer" typeof="mw:File"><a href="/wiki/File:Wiktionary-logo-en-v2.svg" class="mw-file-description"><img alt="" src="//upload.wikimedia.org/wikipedia/commons/thumb/9/99/Wiktionary-logo-en-v2.svg/40px-Wiktionary-logo-en-v2.svg.png" decoding="async" width="40" height="40" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/9/99/Wiktionary-logo-en-v2.svg/60px-Wiktionary-logo-en-v2.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/9/99/Wiktionary-logo-en-v2.svg/120px-Wiktionary-logo-en-v2.svg.png 2x" data-file-width="512" data-file-height="512" /></a></span></div> <div class="side-box-text plainlist">Look up <i><b><a href="https://en.wiktionary.org/wiki/Special:Search/questionnaire" class="extiw" title="wiktionary:Special:Search/questionnaire">questionnaire</a></b></i> in Wiktionary, the free dictionary.</div></div> </div> <ul><li><a rel="nofollow" class="external text" href="http://www.ons.gov.uk/ons/guide-method/harmonisation/harmonisation-index-page/index.html">Harmonised questions</a> from the UK <a href="/wiki/Office_for_National_Statistics" title="Office for National Statistics">Office for National Statistics</a></li> <li><a href="https://en.wikiversity.org/wiki/Hints_for_designing_effective_questionnaires" class="extiw" title="v:Hints for designing effective questionnaires">Hints for designing effective questionnaires</a> - from the ERIC Clearinghouse on Assessment and Evaluation</li></ul> <div class="navbox-styles"><style data-mw-deduplicate="TemplateStyles:r1129693374">.mw-parser-output .hlist dl,.mw-parser-output .hlist ol,.mw-parser-output .hlist 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.navbar{display:none!important}}</style><div class="navbar plainlinks hlist navbar-mini"><ul><li class="nv-view"><a href="/wiki/Template:Social_surveys" title="Template:Social surveys"><abbr title="View this template">v</abbr></a></li><li class="nv-talk"><a href="/wiki/Template_talk:Social_surveys" title="Template talk:Social surveys"><abbr title="Discuss this template">t</abbr></a></li><li class="nv-edit"><a href="/wiki/Special:EditPage/Template:Social_surveys" title="Special:EditPage/Template:Social surveys"><abbr title="Edit this template">e</abbr></a></li></ul></div><div id="Social_survey_research490" style="font-size:114%;margin:0 4em">Social <a href="/wiki/Survey_(human_research)" title="Survey (human research)">survey research</a></div></th></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Data_collection" title="Data collection">Data collection</a></th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Survey_data_collection" title="Survey data collection">Collection methods</a></li> <li><a class="mw-selflink selflink">Questionnaire</a></li> <li><a href="/wiki/Interview_(research)" title="Interview (research)">Interview</a> <ul><li><a href="/wiki/Structured_interview" title="Structured interview">Structured</a></li> <li><a href="/wiki/Semi-structured_interview" title="Semi-structured interview">Semi-structured</a></li> <li><a href="/wiki/Unstructured_interview" title="Unstructured interview">Unstructured</a></li> <li><a href="/wiki/Couple_interview" title="Couple interview">Couple</a></li></ul></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Survey_methodology" title="Survey methodology">Methodology</a></th><td class="navbox-list-with-group navbox-list navbox-even hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Census" title="Census">Census</a></li> <li><a href="/wiki/Sampling_frame" title="Sampling frame">Sampling frame</a></li> <li><a href="/wiki/Sample_(statistics)" class="mw-redirect" title="Sample (statistics)">Statistical sample</a></li> <li><a href="/wiki/Survey_sampling" title="Survey sampling">Sampling for surveys</a> <ul><li><a href="/wiki/Sampling_(statistics)" title="Sampling (statistics)">Random sampling</a></li> <li><a href="/wiki/Simple_random_sample" title="Simple random sample">Simple random sampling</a></li> <li><a href="/wiki/Quota_sampling" title="Quota sampling">Quota sampling</a></li> <li><a href="/wiki/Stratified_sampling" title="Stratified sampling">Stratified sampling</a></li> <li><a href="/wiki/Nonprobability_sampling" title="Nonprobability sampling">Nonprobability sampling</a></li> <li><a href="/wiki/Sample_size_determination" title="Sample size determination">Sample size determination</a></li></ul></li> <li><a href="/wiki/Research_design" title="Research design">Research design</a> <ul><li><a href="/wiki/Longitudinal_study" title="Longitudinal study">Panel study</a></li> <li><a href="/wiki/Cohort_study" title="Cohort study">Cohort study</a></li> <li><a href="/wiki/Cross-sectional_study" title="Cross-sectional study">Cross-sectional study</a></li> <li><a href="/wiki/Cross-sequential_study" title="Cross-sequential study">Cross-sequential study</a></li></ul></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Total_survey_error" title="Total survey error">Survey errors</a></th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Sampling_error" title="Sampling error">Sampling error</a></li> <li><a href="/wiki/Standard_error" title="Standard error">Standard error</a></li> <li><a href="/wiki/Sampling_bias" title="Sampling bias">Sampling bias</a></li> <li><a href="/wiki/Systematic_errors" class="mw-redirect" title="Systematic errors">Systematic errors</a></li> <li><a href="/wiki/Non-sampling_error" title="Non-sampling error">Non-sampling error</a> <ul><li><a href="/wiki/Statistical_model_specification#Specification_error_and_bias" title="Statistical model specification">Specification error</a></li> <li><a href="/wiki/Sampling_frame#Sampling_frames_problems" title="Sampling frame">Frame error</a></li> <li><a href="/wiki/Observational_error" title="Observational error">Measurement error</a></li> <li><a href="/wiki/Respondent_error" title="Respondent error">Response errors</a></li> <li><a href="/wiki/Participation_bias" title="Participation bias">Non-response bias</a></li> <li><a href="/wiki/Coverage_error" title="Coverage error">Coverage error</a></li> <li><a href="/wiki/Pseudo-opinion" class="mw-redirect" title="Pseudo-opinion">Pseudo-opinion</a></li> <li><a href="/wiki/Data_collection#Data_integrity_issues" title="Data collection">Processing errors</a></li></ul></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Data_analysis" title="Data analysis">Data analysis</a></th><td class="navbox-list-with-group navbox-list navbox-even hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Categorical_variable" title="Categorical variable">Categorical data</a></li> <li><a href="/wiki/Contingency_table" title="Contingency table">Contingency table</a></li> <li><a href="/wiki/Level_of_measurement" title="Level of measurement">Level of measurement</a></li> <li><a href="/wiki/Descriptive_statistics" title="Descriptive statistics">Descriptive statistics</a></li> <li><a href="/wiki/Exploratory_data_analysis" title="Exploratory data analysis">Exploratory data analysis</a></li> <li><a href="/wiki/Multivariate_statistics" title="Multivariate statistics">Multivariate statistics</a></li> <li><a href="/wiki/Psychometrics" title="Psychometrics">Psychometrics</a></li> <li><a href="/wiki/Statistical_inference" title="Statistical inference">Statistical inference</a></li> <li><a href="/wiki/Statistical_model" title="Statistical model">Statistical models</a> <ul><li><a href="/wiki/Graphical_model" title="Graphical model">Graphical</a></li> <li><a href="/wiki/Poisson_regression" title="Poisson regression">Log-linear</a></li> <li><a href="/wiki/Structural_equation_modeling" title="Structural equation modeling">Structural</a></li></ul></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Applications</th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Audience_measurement" title="Audience measurement">Audience measurement</a></li> <li><a href="/wiki/Demography" title="Demography">Demography</a></li> <li><a href="/wiki/Market_research" title="Market research">Market research</a></li> <li><a href="/wiki/Opinion_poll" title="Opinion poll">Opinion poll</a></li> <li><a href="/wiki/Public_opinion" title="Public opinion">Public opinion</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Major surveys</th><td class="navbox-list-with-group navbox-list navbox-even hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/List_of_comparative_social_surveys" title="List of comparative social surveys">List of comparative social surveys</a></li> <li><a href="/wiki/Afrobarometer" title="Afrobarometer">Afrobarometer</a></li> <li><a href="/wiki/American_National_Election_Studies" title="American National Election Studies">American National Election Studies</a></li> <li><a href="/wiki/Asian_Barometer_Survey" title="Asian Barometer Survey">Asian Barometer Survey</a></li> <li><a href="/wiki/Comparative_Study_of_Electoral_Systems" title="Comparative Study of Electoral Systems">Comparative Study of Electoral Systems</a></li> <li>Emerson College Polling</li> <li><a href="/wiki/Eurobarometer" title="Eurobarometer">Eurobarometer</a></li> <li><a href="/wiki/European_Social_Survey" title="European Social Survey">European Social Survey</a></li> <li><a href="/wiki/Gallup_(company)" class="mw-redirect" title="Gallup (company)">Gallup Poll</a></li> <li><a href="/wiki/General_Social_Survey" title="General Social Survey">General Social Survey</a></li> <li><a href="/wiki/Household,_Income_and_Labour_Dynamics_in_Australia_Survey" title="Household, Income and Labour Dynamics in Australia Survey">Household, Income and Labour Dynamics in Australia Survey</a></li> <li><a href="/wiki/International_Social_Survey_Programme" title="International Social Survey Programme">International Social Survey</a></li> <li><a href="/wiki/Latinobar%C3%B3metro" title="Latinobarómetro">Latinobarómetro</a></li> <li><a href="/wiki/List_of_household_surveys_in_the_United_States" title="List of household surveys in the United States">List of household surveys in the United States</a></li> <li><a href="/wiki/National_Health_and_Nutrition_Examination_Survey" title="National Health and Nutrition Examination Survey">National Health and Nutrition Examination Survey</a></li> <li><a href="/wiki/New_Zealand_Attitudes_and_Values_Study" title="New Zealand Attitudes and Values Study">New Zealand Attitudes and Values Study</a></li> <li><a href="/wiki/Suffolk_University_Political_Research_Center" title="Suffolk University Political Research Center">Suffolk University Political Research Center</a></li> <li><a href="/wiki/The_Phillips_Academy_Poll" class="mw-redirect" title="The Phillips Academy Poll">The Phillips Academy Poll</a></li> <li><a href="/wiki/Quinnipiac_University_Polling_Institute" title="Quinnipiac University Polling Institute">Quinnipiac University Polling Institute</a></li> <li><a href="/wiki/World_Values_Survey" title="World Values Survey">World Values Survey</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Associations</th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/American_Association_for_Public_Opinion_Research" title="American Association for Public Opinion Research">American Association for Public Opinion Research</a></li> <li><a href="/wiki/ESOMAR" title="ESOMAR">European Society for Opinion and Marketing Research</a></li> <li><a href="/wiki/International_Statistical_Institute" title="International Statistical Institute">International Statistical Institute</a></li> <li><a href="/wiki/Pew_Research_Center" title="Pew Research Center">Pew Research Center</a></li> <li><a href="/wiki/World_Association_for_Public_Opinion_Research" title="World Association for Public Opinion Research">World Association for Public Opinion Research</a></li></ul> </div></td></tr><tr><td class="navbox-abovebelow hlist" colspan="2"><div> <ul><li><a href="/wiki/Category:Research_methods" title="Category:Research methods">Category</a></li> <li>Projects <ul><li><a href="/wiki/Wikipedia:WikiProject_Business" title="Wikipedia:WikiProject Business">Business</a></li> <li><a href="/wiki/Wikipedia:WikiProject_Politics" title="Wikipedia:WikiProject Politics">Politics</a></li> <li><a href="/wiki/Wikipedia:WikiProject_Psychology" title="Wikipedia:WikiProject Psychology">Psychology</a></li> <li><a href="/wiki/Wikipedia:WikiProject_Sociology" title="Wikipedia:WikiProject Sociology">Sociology</a></li> <li><a href="/wiki/Wikipedia:WikiProject_Statistics" title="Wikipedia:WikiProject Statistics">Statistics</a></li></ul></li></ul> </div></td></tr></tbody></table></div> <div class="navbox-styles"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1129693374" /><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1236075235" /><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1129693374" /></div><div role="navigation" class="navbox" aria-labelledby="Statistics636" style="padding:3px"><table class="nowraplinks hlist mw-collapsible mw-collapsed navbox-inner" style="border-spacing:0;background:transparent;color:inherit"><tbody><tr><th scope="col" class="navbox-title" colspan="2"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1129693374" /><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1239400231" /><div class="navbar plainlinks hlist navbar-mini"><ul><li class="nv-view"><a href="/wiki/Template:Statistics" title="Template:Statistics"><abbr title="View this template">v</abbr></a></li><li class="nv-talk"><a href="/wiki/Template_talk:Statistics" title="Template talk:Statistics"><abbr title="Discuss this template">t</abbr></a></li><li class="nv-edit"><a href="/wiki/Special:EditPage/Template:Statistics" title="Special:EditPage/Template:Statistics"><abbr title="Edit this template">e</abbr></a></li></ul></div><div id="Statistics636" style="font-size:114%;margin:0 4em"><a href="/wiki/Statistics" title="Statistics">Statistics</a></div></th></tr><tr><td class="navbox-abovebelow" colspan="2"><div> <ul><li><a href="/wiki/Outline_of_statistics" title="Outline of statistics">Outline</a></li> <li><a href="/wiki/List_of_statistics_articles" title="List of statistics articles">Index</a></li></ul> </div></td></tr><tr><td colspan="2" class="navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks mw-collapsible mw-collapsed navbox-subgroup" style="border-spacing:0"><tbody><tr><th scope="col" class="navbox-title" colspan="2"><div id="Descriptive_statistics636" style="font-size:114%;margin:0 4em"><a href="/wiki/Descriptive_statistics" title="Descriptive statistics">Descriptive statistics</a></div></th></tr><tr><td colspan="2" class="navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th scope="row" class="navbox-group" style="width:12.5em"><a href="/wiki/Continuous_probability_distribution" class="mw-redirect" title="Continuous probability distribution">Continuous data</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th scope="row" class="navbox-group" style="width:1%;font-weight:normal;"><a href="/wiki/Central_tendency" title="Central tendency">Center</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Mean" title="Mean">Mean</a> <ul><li><a href="/wiki/Arithmetic_mean" title="Arithmetic mean">Arithmetic</a></li> <li><a href="/wiki/Arithmetic%E2%80%93geometric_mean" title="Arithmetic–geometric mean">Arithmetic-Geometric</a></li> <li><a href="/wiki/Contraharmonic_mean" title="Contraharmonic mean">Contraharmonic</a></li> <li><a href="/wiki/Cubic_mean" title="Cubic mean">Cubic</a></li> <li><a href="/wiki/Generalized_mean" title="Generalized mean">Generalized/power</a></li> <li><a href="/wiki/Geometric_mean" title="Geometric mean">Geometric</a></li> <li><a href="/wiki/Harmonic_mean" title="Harmonic mean">Harmonic</a></li> <li><a href="/wiki/Heronian_mean" title="Heronian mean">Heronian</a></li> <li><a href="/wiki/Heinz_mean" title="Heinz mean">Heinz</a></li> <li><a href="/wiki/Lehmer_mean" title="Lehmer mean">Lehmer</a></li></ul></li> <li><a href="/wiki/Median" title="Median">Median</a></li> <li><a href="/wiki/Mode_(statistics)" title="Mode (statistics)">Mode</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%;font-weight:normal;"><a href="/wiki/Statistical_dispersion" title="Statistical dispersion">Dispersion</a></th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Average_absolute_deviation" title="Average absolute deviation">Average absolute deviation</a></li> <li><a href="/wiki/Coefficient_of_variation" title="Coefficient of variation">Coefficient of variation</a></li> <li><a href="/wiki/Interquartile_range" title="Interquartile range">Interquartile range</a></li> <li><a href="/wiki/Percentile" title="Percentile">Percentile</a></li> <li><a href="/wiki/Range_(statistics)" title="Range (statistics)">Range</a></li> <li><a href="/wiki/Standard_deviation" title="Standard deviation">Standard deviation</a></li> <li><a href="/wiki/Variance#Sample_variance" title="Variance">Variance</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%;font-weight:normal;"><a href="/wiki/Shape_of_the_distribution" class="mw-redirect" title="Shape of the distribution">Shape</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Central_limit_theorem" title="Central limit theorem">Central limit theorem</a></li> <li><a href="/wiki/Moment_(mathematics)" title="Moment (mathematics)">Moments</a> <ul><li><a href="/wiki/Kurtosis" title="Kurtosis">Kurtosis</a></li> <li><a href="/wiki/L-moment" title="L-moment">L-moments</a></li> <li><a href="/wiki/Skewness" title="Skewness">Skewness</a></li></ul></li></ul> </div></td></tr></tbody></table><div></div></td></tr><tr><th scope="row" class="navbox-group" style="width:12.5em"><a href="/wiki/Count_data" title="Count data">Count data</a></th><td class="navbox-list-with-group navbox-list navbox-even" style="padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Index_of_dispersion" title="Index of dispersion">Index of dispersion</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:12.5em">Summary tables</th><td class="navbox-list-with-group navbox-list navbox-odd" style="padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Contingency_table" title="Contingency table">Contingency table</a></li> <li><a href="/wiki/Frequency_distribution" class="mw-redirect" title="Frequency distribution">Frequency distribution</a></li> <li><a href="/wiki/Grouped_data" title="Grouped data">Grouped data</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:12.5em"><a href="/wiki/Correlation_and_dependence" class="mw-redirect" title="Correlation and dependence">Dependence</a></th><td class="navbox-list-with-group navbox-list navbox-even" style="padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Partial_correlation" title="Partial correlation">Partial correlation</a></li> <li><a href="/wiki/Pearson_correlation_coefficient" title="Pearson correlation coefficient">Pearson product-moment correlation</a></li> <li><a href="/wiki/Rank_correlation" title="Rank correlation">Rank correlation</a> <ul><li><a href="/wiki/Kendall_rank_correlation_coefficient" title="Kendall rank correlation coefficient">Kendall's τ</a></li> <li><a href="/wiki/Spearman%27s_rank_correlation_coefficient" title="Spearman's rank correlation coefficient">Spearman's ρ</a></li></ul></li> <li><a href="/wiki/Scatter_plot" title="Scatter plot">Scatter plot</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:12.5em"><a href="/wiki/Statistical_graphics" title="Statistical graphics">Graphics</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Bar_chart" title="Bar chart">Bar chart</a></li> <li><a href="/wiki/Biplot" title="Biplot">Biplot</a></li> <li><a href="/wiki/Box_plot" title="Box plot">Box plot</a></li> <li><a href="/wiki/Control_chart" title="Control chart">Control chart</a></li> <li><a href="/wiki/Correlogram" title="Correlogram">Correlogram</a></li> <li><a href="/wiki/Fan_chart_(statistics)" title="Fan chart (statistics)">Fan chart</a></li> <li><a href="/wiki/Forest_plot" title="Forest plot">Forest plot</a></li> <li><a href="/wiki/Histogram" title="Histogram">Histogram</a></li> <li><a href="/wiki/Pie_chart" title="Pie chart">Pie chart</a></li> <li><a href="/wiki/Q%E2%80%93Q_plot" title="Q–Q plot">Q–Q plot</a></li> <li><a href="/wiki/Radar_chart" title="Radar chart">Radar chart</a></li> <li><a href="/wiki/Run_chart" title="Run chart">Run chart</a></li> <li><a href="/wiki/Scatter_plot" title="Scatter plot">Scatter plot</a></li> <li><a href="/wiki/Stem-and-leaf_display" title="Stem-and-leaf display">Stem-and-leaf display</a></li> <li><a href="/wiki/Violin_plot" title="Violin plot">Violin plot</a></li></ul> </div></td></tr></tbody></table><div></div></td></tr></tbody></table><div></div></td></tr><tr><td colspan="2" class="navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks mw-collapsible uncollapsed navbox-subgroup" style="border-spacing:0"><tbody><tr><th scope="col" class="navbox-title" colspan="2"><div id="Data_collection636" style="font-size:114%;margin:0 4em"><a href="/wiki/Data_collection" title="Data collection">Data collection</a></div></th></tr><tr><td colspan="2" class="navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th scope="row" class="navbox-group" style="width:12.5em"><a href="/wiki/Design_of_experiments" title="Design of experiments">Study design</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Effect_size" title="Effect size">Effect size</a></li> <li><a href="/wiki/Missing_data" title="Missing data">Missing data</a></li> <li><a href="/wiki/Optimal_design" class="mw-redirect" title="Optimal design">Optimal design</a></li> <li><a href="/wiki/Statistical_population" title="Statistical population">Population</a></li> <li><a href="/wiki/Replication_(statistics)" title="Replication (statistics)">Replication</a></li> <li><a href="/wiki/Sample_size_determination" title="Sample size determination">Sample size determination</a></li> <li><a href="/wiki/Statistic" title="Statistic">Statistic</a></li> <li><a href="/wiki/Statistical_power" class="mw-redirect" title="Statistical power">Statistical power</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:12.5em"><a href="/wiki/Survey_methodology" title="Survey methodology">Survey methodology</a></th><td class="navbox-list-with-group navbox-list navbox-even" style="padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Sampling_(statistics)" title="Sampling (statistics)">Sampling</a> <ul><li><a href="/wiki/Cluster_sampling" title="Cluster sampling">Cluster</a></li> <li><a href="/wiki/Stratified_sampling" title="Stratified sampling">Stratified</a></li></ul></li> <li><a href="/wiki/Opinion_poll" title="Opinion poll">Opinion poll</a></li> <li><a class="mw-selflink selflink">Questionnaire</a></li> <li><a href="/wiki/Standard_error" title="Standard error">Standard error</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:12.5em"><a href="/wiki/Experiment" title="Experiment">Controlled experiments</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Blocking_(statistics)" title="Blocking (statistics)">Blocking</a></li> <li><a href="/wiki/Factorial_experiment" title="Factorial experiment">Factorial experiment</a></li> <li><a href="/wiki/Interaction_(statistics)" title="Interaction (statistics)">Interaction</a></li> <li><a href="/wiki/Random_assignment" title="Random assignment">Random assignment</a></li> <li><a href="/wiki/Randomized_controlled_trial" title="Randomized controlled trial">Randomized controlled trial</a></li> <li><a href="/wiki/Randomized_experiment" title="Randomized experiment">Randomized experiment</a></li> <li><a href="/wiki/Scientific_control" title="Scientific control">Scientific control</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:12.5em">Adaptive designs</th><td class="navbox-list-with-group navbox-list navbox-even" style="padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Adaptive_clinical_trial" class="mw-redirect" title="Adaptive clinical trial">Adaptive clinical trial</a></li> <li><a href="/wiki/Stochastic_approximation" title="Stochastic approximation">Stochastic approximation</a></li> <li><a href="/wiki/Up-and-Down_Designs" class="mw-redirect" title="Up-and-Down Designs">Up-and-down designs</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:12.5em"><a href="/wiki/Observational_study" title="Observational study">Observational studies</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Cohort_study" title="Cohort study">Cohort study</a></li> <li><a href="/wiki/Cross-sectional_study" title="Cross-sectional study">Cross-sectional study</a></li> <li><a href="/wiki/Natural_experiment" title="Natural experiment">Natural experiment</a></li> <li><a href="/wiki/Quasi-experiment" title="Quasi-experiment">Quasi-experiment</a></li></ul> </div></td></tr></tbody></table><div></div></td></tr></tbody></table><div></div></td></tr><tr><td colspan="2" class="navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks mw-collapsible mw-collapsed navbox-subgroup" style="border-spacing:0"><tbody><tr><th scope="col" class="navbox-title" colspan="2"><div id="Statistical_inference636" style="font-size:114%;margin:0 4em"><a href="/wiki/Statistical_inference" title="Statistical inference">Statistical inference</a></div></th></tr><tr><td colspan="2" class="navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th scope="row" class="navbox-group" style="width:12.5em"><a href="/wiki/Statistical_theory" title="Statistical theory">Statistical theory</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Population_(statistics)" class="mw-redirect" title="Population (statistics)">Population</a></li> <li><a href="/wiki/Statistic" title="Statistic">Statistic</a></li> <li><a href="/wiki/Probability_distribution" title="Probability distribution">Probability distribution</a></li> <li><a href="/wiki/Sampling_distribution" title="Sampling distribution">Sampling distribution</a> <ul><li><a href="/wiki/Order_statistic" title="Order statistic">Order statistic</a></li></ul></li> <li><a href="/wiki/Empirical_distribution_function" title="Empirical distribution function">Empirical distribution</a> <ul><li><a href="/wiki/Density_estimation" title="Density estimation">Density estimation</a></li></ul></li> <li><a href="/wiki/Statistical_model" title="Statistical model">Statistical model</a> <ul><li><a href="/wiki/Model_specification" class="mw-redirect" title="Model specification">Model specification</a></li> <li><a href="/wiki/Lp_space" title="Lp space">L<sup><i>p</i></sup> space</a></li></ul></li> <li><a href="/wiki/Statistical_parameter" title="Statistical parameter">Parameter</a> <ul><li><a href="/wiki/Location_parameter" title="Location parameter">location</a></li> <li><a href="/wiki/Scale_parameter" title="Scale parameter">scale</a></li> <li><a href="/wiki/Shape_parameter" title="Shape parameter">shape</a></li></ul></li> <li><a href="/wiki/Parametric_statistics" title="Parametric statistics">Parametric family</a> <ul><li><a href="/wiki/Likelihood_function" title="Likelihood function">Likelihood</a> <a href="/wiki/Monotone_likelihood_ratio" title="Monotone likelihood ratio"><span style="font-size: 85%;">(monotone)</span></a></li> <li><a href="/wiki/Location%E2%80%93scale_family" title="Location–scale family">Location–scale family</a></li> <li><a href="/wiki/Exponential_family" title="Exponential family">Exponential family</a></li></ul></li> <li><a href="/wiki/Completeness_(statistics)" title="Completeness (statistics)">Completeness</a></li> <li><a href="/wiki/Sufficient_statistic" title="Sufficient statistic">Sufficiency</a></li> <li><a href="/wiki/Plug-in_principle" class="mw-redirect" title="Plug-in principle">Statistical functional</a> <ul><li><a href="/wiki/Bootstrapping_(statistics)" title="Bootstrapping (statistics)">Bootstrap</a></li> <li><a href="/wiki/U-statistic" title="U-statistic">U</a></li> <li><a href="/wiki/V-statistic" title="V-statistic">V</a></li></ul></li> <li><a href="/wiki/Optimal_decision" title="Optimal decision">Optimal decision</a> <ul><li><a href="/wiki/Loss_function" title="Loss function">loss function</a></li></ul></li> <li><a href="/wiki/Efficiency_(statistics)" title="Efficiency (statistics)">Efficiency</a></li> <li><a href="/wiki/Statistical_distance" title="Statistical distance">Statistical distance</a> <ul><li><a href="/wiki/Divergence_(statistics)" title="Divergence (statistics)">divergence</a></li></ul></li> <li><a href="/wiki/Asymptotic_theory_(statistics)" title="Asymptotic theory (statistics)">Asymptotics</a></li> <li><a href="/wiki/Robust_statistics" title="Robust statistics">Robustness</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:12.5em"><a href="/wiki/Frequentist_inference" title="Frequentist inference">Frequentist inference</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th scope="row" class="navbox-group" style="width:1%;font-weight:normal;"><a href="/wiki/Point_estimation" title="Point estimation">Point estimation</a></th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Estimating_equations" title="Estimating equations">Estimating equations</a> <ul><li><a href="/wiki/Maximum_likelihood" class="mw-redirect" title="Maximum likelihood">Maximum likelihood</a></li> <li><a href="/wiki/Method_of_moments_(statistics)" title="Method of moments (statistics)">Method of moments</a></li> <li><a href="/wiki/M-estimator" title="M-estimator">M-estimator</a></li> <li><a href="/wiki/Minimum_distance_estimation" class="mw-redirect" title="Minimum distance estimation">Minimum distance</a></li></ul></li> <li><a href="/wiki/Bias_of_an_estimator" title="Bias of an estimator">Unbiased estimators</a> <ul><li><a href="/wiki/Minimum-variance_unbiased_estimator" title="Minimum-variance unbiased estimator">Mean-unbiased minimum-variance</a> <ul><li><a href="/wiki/Rao%E2%80%93Blackwell_theorem" title="Rao–Blackwell theorem">Rao–Blackwellization</a></li> <li><a href="/wiki/Lehmann%E2%80%93Scheff%C3%A9_theorem" title="Lehmann–Scheffé theorem">Lehmann–Scheffé theorem</a></li></ul></li> <li><a href="/wiki/Median-unbiased_estimator" class="mw-redirect" title="Median-unbiased estimator">Median unbiased</a></li></ul></li> <li><a href="/wiki/Plug-in_principle" class="mw-redirect" title="Plug-in principle">Plug-in</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%;font-weight:normal;"><a href="/wiki/Interval_estimation" title="Interval estimation">Interval estimation</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Confidence_interval" title="Confidence interval">Confidence interval</a></li> <li><a href="/wiki/Pivotal_quantity" title="Pivotal quantity">Pivot</a></li> <li><a href="/wiki/Likelihood_interval" class="mw-redirect" title="Likelihood interval">Likelihood interval</a></li> <li><a href="/wiki/Prediction_interval" title="Prediction interval">Prediction interval</a></li> <li><a href="/wiki/Tolerance_interval" title="Tolerance interval">Tolerance interval</a></li> <li><a href="/wiki/Resampling_(statistics)" title="Resampling (statistics)">Resampling</a> <ul><li><a href="/wiki/Bootstrapping_(statistics)" title="Bootstrapping (statistics)">Bootstrap</a></li> <li><a href="/wiki/Jackknife_resampling" title="Jackknife resampling">Jackknife</a></li></ul></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%;font-weight:normal;"><a href="/wiki/Statistical_hypothesis_testing" class="mw-redirect" title="Statistical hypothesis testing">Testing hypotheses</a></th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/One-_and_two-tailed_tests" title="One- and two-tailed tests">1- & 2-tails</a></li> <li><a href="/wiki/Power_(statistics)" title="Power (statistics)">Power</a> <ul><li><a href="/wiki/Uniformly_most_powerful_test" title="Uniformly most powerful test">Uniformly most powerful test</a></li></ul></li> <li><a href="/wiki/Permutation_test" title="Permutation test">Permutation test</a> <ul><li><a href="/wiki/Randomization_test" class="mw-redirect" title="Randomization test">Randomization test</a></li></ul></li> <li><a href="/wiki/Multiple_comparisons" class="mw-redirect" title="Multiple comparisons">Multiple comparisons</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%;font-weight:normal;"><a href="/wiki/Parametric_statistics" title="Parametric statistics">Parametric tests</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Likelihood-ratio_test" title="Likelihood-ratio test">Likelihood-ratio</a></li> <li><a href="/wiki/Score_test" title="Score test">Score/Lagrange multiplier</a></li> <li><a href="/wiki/Wald_test" title="Wald test">Wald</a></li></ul> </div></td></tr></tbody></table><div></div></td></tr><tr><th scope="row" class="navbox-group" style="width:12.5em"><a href="/wiki/List_of_statistical_tests" title="List of statistical tests">Specific tests</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><td colspan="2" class="navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Z-test" title="Z-test"><i>Z</i>-test <span style="font-size: 85%;">(normal)</span></a></li> <li><a href="/wiki/Student%27s_t-test" title="Student's t-test">Student's <i>t</i>-test</a></li> <li><a href="/wiki/F-test" title="F-test"><i>F</i>-test</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%;font-weight:normal;"><a href="/wiki/Goodness_of_fit" title="Goodness of fit">Goodness of fit</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Chi-squared_test" title="Chi-squared test">Chi-squared</a></li> <li><a href="/wiki/G-test" title="G-test"><i>G</i>-test</a></li> <li><a href="/wiki/Kolmogorov%E2%80%93Smirnov_test" title="Kolmogorov–Smirnov test">Kolmogorov–Smirnov</a></li> <li><a href="/wiki/Anderson%E2%80%93Darling_test" title="Anderson–Darling test">Anderson–Darling</a></li> <li><a href="/wiki/Lilliefors_test" title="Lilliefors test">Lilliefors</a></li> <li><a href="/wiki/Jarque%E2%80%93Bera_test" title="Jarque–Bera test">Jarque–Bera</a></li> <li><a href="/wiki/Shapiro%E2%80%93Wilk_test" title="Shapiro–Wilk test">Normality <span style="font-size: 85%;">(Shapiro–Wilk)</span></a></li> <li><a href="/wiki/Likelihood-ratio_test" title="Likelihood-ratio test">Likelihood-ratio test</a></li> <li><a href="/wiki/Model_selection" title="Model selection">Model selection</a> <ul><li><a href="/wiki/Cross-validation_(statistics)" title="Cross-validation (statistics)">Cross validation</a></li> <li><a href="/wiki/Akaike_information_criterion" title="Akaike information criterion">AIC</a></li> <li><a href="/wiki/Bayesian_information_criterion" title="Bayesian information criterion">BIC</a></li></ul></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%;font-weight:normal;"><a href="/wiki/Rank_statistics" class="mw-redirect" title="Rank statistics">Rank statistics</a></th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Sign_test" title="Sign test">Sign</a> <ul><li><a href="/wiki/Sample_median" class="mw-redirect" title="Sample median">Sample median</a></li></ul></li> <li><a href="/wiki/Wilcoxon_signed-rank_test" title="Wilcoxon signed-rank test">Signed rank <span style="font-size: 85%;">(Wilcoxon)</span></a> <ul><li><a href="/wiki/Hodges%E2%80%93Lehmann_estimator" title="Hodges–Lehmann estimator">Hodges–Lehmann estimator</a></li></ul></li> <li><a href="/wiki/Mann%E2%80%93Whitney_U_test" title="Mann–Whitney U test">Rank sum <span style="font-size: 85%;">(Mann–Whitney)</span></a></li> <li><a href="/wiki/Nonparametric_statistics" title="Nonparametric statistics">Nonparametric</a> <a href="/wiki/Analysis_of_variance" title="Analysis of variance">anova</a> <ul><li><a href="/wiki/Kruskal%E2%80%93Wallis_test" title="Kruskal–Wallis test">1-way <span style="font-size: 85%;">(Kruskal–Wallis)</span></a></li> <li><a href="/wiki/Friedman_test" title="Friedman test">2-way <span style="font-size: 85%;">(Friedman)</span></a></li> <li><a href="/wiki/Jonckheere%27s_trend_test" title="Jonckheere's trend test">Ordered alternative <span style="font-size: 85%;">(Jonckheere–Terpstra)</span></a></li></ul></li> <li><a href="/wiki/Van_der_Waerden_test" title="Van der Waerden test">Van der Waerden test</a></li></ul> </div></td></tr></tbody></table><div></div></td></tr><tr><th scope="row" class="navbox-group" style="width:12.5em"><a href="/wiki/Bayesian_inference" title="Bayesian inference">Bayesian inference</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Bayesian_probability" title="Bayesian probability">Bayesian probability</a> <ul><li><a href="/wiki/Prior_probability" title="Prior probability">prior</a></li> <li><a href="/wiki/Posterior_probability" title="Posterior probability">posterior</a></li></ul></li> <li><a href="/wiki/Credible_interval" title="Credible interval">Credible interval</a></li> <li><a href="/wiki/Bayes_factor" title="Bayes factor">Bayes factor</a></li> <li><a href="/wiki/Bayes_estimator" title="Bayes estimator">Bayesian estimator</a> <ul><li><a href="/wiki/Maximum_a_posteriori_estimation" title="Maximum a posteriori estimation">Maximum posterior estimator</a></li></ul></li></ul> </div></td></tr></tbody></table><div></div></td></tr></tbody></table><div></div></td></tr><tr><td colspan="2" class="navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks mw-collapsible mw-collapsed navbox-subgroup" style="border-spacing:0"><tbody><tr><th scope="col" class="navbox-title" colspan="2"><div id="CorrelationRegression_analysis636" style="font-size:114%;margin:0 4em"><div class="hlist"><ul><li><a href="/wiki/Correlation_and_dependence" class="mw-redirect" title="Correlation and dependence">Correlation</a></li><li><a href="/wiki/Regression_analysis" title="Regression analysis">Regression analysis</a></li></ul></div></div></th></tr><tr><td colspan="2" class="navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th scope="row" class="navbox-group" style="width:12.5em"><a href="/wiki/Correlation_and_dependence" class="mw-redirect" title="Correlation and dependence">Correlation</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Pearson_product-moment_correlation_coefficient" class="mw-redirect" title="Pearson product-moment correlation coefficient">Pearson product-moment</a></li> <li><a href="/wiki/Partial_correlation" title="Partial correlation">Partial correlation</a></li> <li><a href="/wiki/Confounding" title="Confounding">Confounding variable</a></li> <li><a href="/wiki/Coefficient_of_determination" title="Coefficient of determination">Coefficient of determination</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:12.5em"><a href="/wiki/Regression_analysis" title="Regression analysis">Regression analysis</a></th><td class="navbox-list-with-group navbox-list navbox-even" style="padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Errors_and_residuals" title="Errors and residuals">Errors and residuals</a></li> <li><a href="/wiki/Regression_validation" title="Regression validation">Regression validation</a></li> <li><a href="/wiki/Mixed_model" title="Mixed model">Mixed effects models</a></li> <li><a href="/wiki/Simultaneous_equations_model" title="Simultaneous equations model">Simultaneous equations models</a></li> <li><a href="/wiki/Multivariate_adaptive_regression_splines" class="mw-redirect" title="Multivariate adaptive regression splines">Multivariate adaptive regression splines (MARS)</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:12.5em"><a href="/wiki/Linear_regression" title="Linear regression">Linear regression</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Simple_linear_regression" title="Simple linear regression">Simple linear regression</a></li> <li><a href="/wiki/Ordinary_least_squares" title="Ordinary least squares">Ordinary least squares</a></li> <li><a href="/wiki/General_linear_model" title="General linear model">General linear model</a></li> <li><a href="/wiki/Bayesian_linear_regression" title="Bayesian linear regression">Bayesian regression</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:12.5em">Non-standard predictors</th><td class="navbox-list-with-group navbox-list navbox-even" style="padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Nonlinear_regression" title="Nonlinear regression">Nonlinear regression</a></li> <li><a href="/wiki/Nonparametric_regression" title="Nonparametric regression">Nonparametric</a></li> <li><a href="/wiki/Semiparametric_regression" title="Semiparametric regression">Semiparametric</a></li> <li><a href="/wiki/Isotonic_regression" title="Isotonic regression">Isotonic</a></li> <li><a href="/wiki/Robust_regression" title="Robust regression">Robust</a></li> <li><a href="/wiki/Homoscedasticity_and_heteroscedasticity" title="Homoscedasticity and heteroscedasticity">Homoscedasticity and Heteroscedasticity</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:12.5em"><a href="/wiki/Generalized_linear_model" title="Generalized linear model">Generalized linear model</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Exponential_family" title="Exponential family">Exponential families</a></li> <li><a href="/wiki/Logistic_regression" title="Logistic regression">Logistic <span style="font-size: 85%;">(Bernoulli)</span></a> / <a href="/wiki/Binomial_regression" title="Binomial regression">Binomial</a> / <a href="/wiki/Poisson_regression" title="Poisson regression">Poisson regressions</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:12.5em"><a href="/wiki/Partition_of_sums_of_squares" title="Partition of sums of squares">Partition of variance</a></th><td class="navbox-list-with-group navbox-list navbox-even" style="padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Analysis_of_variance" title="Analysis of variance">Analysis of variance (ANOVA, anova)</a></li> <li><a href="/wiki/Analysis_of_covariance" title="Analysis of covariance">Analysis of covariance</a></li> <li><a href="/wiki/Multivariate_analysis_of_variance" title="Multivariate analysis of variance">Multivariate ANOVA</a></li> <li><a href="/wiki/Degrees_of_freedom_(statistics)" title="Degrees of freedom (statistics)">Degrees of freedom</a></li></ul> </div></td></tr></tbody></table><div></div></td></tr></tbody></table><div></div></td></tr><tr><td colspan="2" class="navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks mw-collapsible mw-collapsed navbox-subgroup" style="border-spacing:0"><tbody><tr><th scope="col" class="navbox-title" colspan="2"><div id="Categorical_/_Multivariate_/_Time-series_/_Survival_analysis636" style="font-size:114%;margin:0 4em"><a href="/wiki/Categorical_variable" title="Categorical variable">Categorical</a> / <a href="/wiki/Multivariate_statistics" title="Multivariate statistics">Multivariate</a> / <a href="/wiki/Time_series" title="Time series">Time-series</a> / <a href="/wiki/Survival_analysis" title="Survival analysis">Survival analysis</a></div></th></tr><tr><td colspan="2" class="navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th scope="row" class="navbox-group" style="width:12.5em"><a href="/wiki/Categorical_variable" title="Categorical variable">Categorical</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Cohen%27s_kappa" title="Cohen's kappa">Cohen's kappa</a></li> <li><a href="/wiki/Contingency_table" title="Contingency table">Contingency table</a></li> <li><a href="/wiki/Graphical_model" title="Graphical model">Graphical model</a></li> <li><a href="/wiki/Poisson_regression" title="Poisson regression">Log-linear model</a></li> <li><a href="/wiki/McNemar%27s_test" title="McNemar's test">McNemar's test</a></li> <li><a href="/wiki/Cochran%E2%80%93Mantel%E2%80%93Haenszel_statistics" title="Cochran–Mantel–Haenszel statistics">Cochran–Mantel–Haenszel statistics</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:12.5em"><a href="/wiki/Multivariate_statistics" title="Multivariate statistics">Multivariate</a></th><td class="navbox-list-with-group navbox-list navbox-even" style="padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/General_linear_model" title="General linear model">Regression</a></li> <li><a href="/wiki/Multivariate_analysis_of_variance" title="Multivariate analysis of variance">Manova</a></li> <li><a href="/wiki/Principal_component_analysis" title="Principal component analysis">Principal components</a></li> <li><a href="/wiki/Canonical_correlation" title="Canonical correlation">Canonical correlation</a></li> <li><a href="/wiki/Linear_discriminant_analysis" title="Linear discriminant analysis">Discriminant analysis</a></li> <li><a href="/wiki/Cluster_analysis" title="Cluster analysis">Cluster analysis</a></li> <li><a href="/wiki/Statistical_classification" title="Statistical classification">Classification</a></li> <li><a href="/wiki/Structural_equation_modeling" title="Structural equation modeling">Structural equation model</a> <ul><li><a href="/wiki/Factor_analysis" title="Factor analysis">Factor analysis</a></li></ul></li> <li><a href="/wiki/Multivariate_distribution" class="mw-redirect" title="Multivariate distribution">Multivariate distributions</a> <ul><li><a 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href="/wiki/Stationary_process" title="Stationary process">Stationarity</a></li> <li><a href="/wiki/Seasonal_adjustment" title="Seasonal adjustment">Seasonal adjustment</a></li> <li><a href="/wiki/Exponential_smoothing" title="Exponential smoothing">Exponential smoothing</a></li> <li><a href="/wiki/Cointegration" title="Cointegration">Cointegration</a></li> <li><a href="/wiki/Structural_break" title="Structural break">Structural break</a></li> <li><a href="/wiki/Granger_causality" title="Granger causality">Granger causality</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%;font-weight:normal;">Specific tests</th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Dickey%E2%80%93Fuller_test" title="Dickey–Fuller test">Dickey–Fuller</a></li> <li><a href="/wiki/Johansen_test" title="Johansen test">Johansen</a></li> <li><a href="/wiki/Ljung%E2%80%93Box_test" title="Ljung–Box test">Q-statistic <span style="font-size: 85%;">(Ljung–Box)</span></a></li> <li><a href="/wiki/Durbin%E2%80%93Watson_statistic" title="Durbin–Watson statistic">Durbin–Watson</a></li> <li><a href="/wiki/Breusch%E2%80%93Godfrey_test" title="Breusch–Godfrey test">Breusch–Godfrey</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%;font-weight:normal;"><a href="/wiki/Time_domain" title="Time domain">Time domain</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Autocorrelation" title="Autocorrelation">Autocorrelation (ACF)</a> <ul><li><a href="/wiki/Partial_autocorrelation_function" title="Partial autocorrelation function">partial (PACF)</a></li></ul></li> <li><a href="/wiki/Cross-correlation" title="Cross-correlation">Cross-correlation (XCF)</a></li> <li><a href="/wiki/Autoregressive%E2%80%93moving-average_model" class="mw-redirect" title="Autoregressive–moving-average model">ARMA model</a></li> <li><a href="/wiki/Box%E2%80%93Jenkins_method" title="Box–Jenkins method">ARIMA model <span style="font-size: 85%;">(Box–Jenkins)</span></a></li> <li><a href="/wiki/Autoregressive_conditional_heteroskedasticity" title="Autoregressive conditional heteroskedasticity">Autoregressive conditional heteroskedasticity (ARCH)</a></li> <li><a href="/wiki/Vector_autoregression" title="Vector autoregression">Vector autoregression (VAR)</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%;font-weight:normal;"><a href="/wiki/Frequency_domain" title="Frequency domain">Frequency domain</a></th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Spectral_density_estimation" title="Spectral density estimation">Spectral density estimation</a></li> <li><a href="/wiki/Fourier_analysis" title="Fourier analysis">Fourier 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