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data-event-name="pinnable-header.vector-appearance.unpin">hide</button> </div> </div> </div> </nav> </div> </div> <div id="bodyContent" class="vector-body" aria-labelledby="firstHeading" data-mw-ve-target-container> <div class="vector-body-before-content"> <div class="mw-indicators"> </div> <div id="siteSub" class="noprint">From Wikipedia, the free encyclopedia</div> </div> <div id="contentSub"><div id="mw-content-subtitle"></div></div> <div id="mw-content-text" class="mw-body-content"><div class="mw-content-ltr mw-parser-output" lang="en" dir="ltr"><div class="shortdescription nomobile noexcerpt noprint searchaux" style="display:none">Form of cognitive bias</div> <p>The <b>horn effect</b>, closely related to the <a href="/wiki/Halo_effect" title="Halo effect">halo effect</a>, is a form of <a href="/wiki/Cognitive_bias" title="Cognitive bias">cognitive bias</a> that causes one's perception of another to be unduly influenced by a single negative trait.<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-Attitudes_2-0" class="reference"><a href="#cite_note-Attitudes-2"><span class="cite-bracket">[</span>2<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-JoshKennon_3-0" class="reference"><a href="#cite_note-JoshKennon-3"><span class="cite-bracket">[</span>3<span class="cite-bracket">]</span></a></sup> An example of the horn effect may be that an observer is more likely to assume a physically unattractive person is morally inferior to an attractive person, despite the lack of relationship between morality and physical appearance.<sup id="cite_ref-study.com_4-0" class="reference"><a href="#cite_note-study.com-4"><span class="cite-bracket">[</span>4<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-nisbett_5-0" class="reference"><a href="#cite_note-nisbett-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="Etymology">Etymology</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Horn_effect&action=edit&section=1" title="Edit section: Etymology"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>The term is derived from the word "horn" and refers to the <a href="/wiki/Sign_of_the_horns" title="Sign of the horns">devil's horns</a>. This is in contrast to the word halo and the <a href="/wiki/Halo_effect" title="Halo effect">halo effect</a>, based on the concept of a <a href="/wiki/Halo_(religious_iconography)" title="Halo (religious iconography)">saint's halo</a>.<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><p>In a 1920 study published by Thorndike<sup id="cite_ref-ThornD_7-0" class="reference"><a href="#cite_note-ThornD-7"><span class="cite-bracket">[</span>7<span class="cite-bracket">]</span></a></sup> that focused on the halo effect, it was noted that "ratings were apparently affected by a marked tendency to think of the person in general as rather good or rather interior  [<i><a href="/wiki/Sic" title="Sic">sic</a></i>]<sup id="cite_ref-8" class="reference"><a href="#cite_note-8"><span class="cite-bracket">[</span>a<span class="cite-bracket">]</span></a></sup> and to color the judgments of the qualities by this general feeling".<sup id="cite_ref-9" class="reference"><a href="#cite_note-9"><span class="cite-bracket">[</span>b<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading3"><h3 id="Alternate_terminology">Alternate terminology</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Horn_effect&action=edit&section=2" title="Edit section: Alternate terminology"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>It is sometimes called the <i>horns effect</i>,<sup id="cite_ref-Attitudes_2-1" class="reference"><a href="#cite_note-Attitudes-2"><span class="cite-bracket">[</span>2<span class="cite-bracket">]</span></a></sup> <i>reverse-halo effect</i>, or <i>devil effect</i>.<sup id="cite_ref-10" class="reference"><a href="#cite_note-10"><span class="cite-bracket">[</span>8<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading2"><h2 id="Bias_in_action">Bias in action</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Horn_effect&action=edit&section=3" title="Edit section: Bias in action"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>The horn effect occurs when "individuals believe that negative traits are connected to each other."<sup id="cite_ref-JoshKennon_3-1" class="reference"><a href="#cite_note-JoshKennon-3"><span class="cite-bracket">[</span>3<span class="cite-bracket">]</span></a></sup> It is a phenomenon in which an observer's judgment of a person is adversely affected by the presence of (for the observer) an unfavorable aspect of this person. </p> <ul><li><i><a href="/wiki/The_Guardian" title="The Guardian">The Guardian</a></i> wrote of the devil effect in relation to <a href="/wiki/Hugo_Chavez" class="mw-redirect" title="Hugo Chavez">Hugo Chavez</a>: "Some leaders can become so demonised that it's impossible to assess their achievements and failures in a balanced way."<sup id="cite_ref-11" class="reference"><a href="#cite_note-11"><span class="cite-bracket">[</span>9<span class="cite-bracket">]</span></a></sup></li></ul> <ul><li>The relation of crime to attractiveness is also subject to the halo effect. A study presented two hypothetical crimes: a <a href="/wiki/Burglary" title="Burglary">burglary</a> and a <a href="/wiki/Confidence_trick" class="mw-redirect" title="Confidence trick">swindle</a>. The burglary involved a woman illegally obtaining a key and stealing $2,200; the swindle involved a woman manipulating a man to invest $2,200 in a nonexistent corporation. The results showed that when the offense was not related to attractiveness (as in the burglary) the unattractive defendant was punished more severely than the attractive one. However, when the offense was related to attractiveness (the swindle), the attractive defendant was punished more severely than the unattractive one. The study imputes that the usual leniency given to the attractive woman (as a result of the halo effect) was negated or reversed when the nature of the crime involved her looks.<sup id="cite_ref-ostrove_sigall1975_12-0" class="reference"><a href="#cite_note-ostrove_sigall1975-12"><span class="cite-bracket">[</span>10<span class="cite-bracket">]</span></a></sup></li></ul> <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=Horn_effect&action=edit&section=4" title="Edit section: See also"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li><a href="/wiki/Splitting_(psychology)" title="Splitting (psychology)">Splitting (psychology)</a></li></ul> <div class="mw-heading mw-heading2"><h2 id="Explanatory_notes">Explanatory notes</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Horn_effect&action=edit&section=5" title="Edit section: Explanatory notes"><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 reflist-lower-alpha"> <div class="mw-references-wrap"><ol class="references"> <li id="cite_note-8"><span class="mw-cite-backlink"><b><a href="#cite_ref-8">^</a></b></span> <span class="reference-text">"inferior"</span> </li> <li id="cite_note-9"><span class="mw-cite-backlink"><b><a href="#cite_ref-9">^</a></b></span> <span class="reference-text">Although not popularizing the actual term Horn effect.</span> </li> </ol></div></div> <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=Horn_effect&action=edit&section=6" title="Edit section: References"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1239543626"><div 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.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 class="citation web cs1"><a rel="nofollow" class="external text" href="https://www.simplypsychology.org/halo-effect.html">"Halo Effect: Definition and Examples"</a>. Simply Psychology<span class="reference-accessdate">. Retrieved <span class="nowrap">2022-02-11</span></span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=Halo+Effect%3A+Definition+and+Examples&rft.pub=Simply+Psychology&rft_id=https%3A%2F%2Fwww.simplypsychology.org%2Fhalo-effect.html&rfr_id=info%3Asid%2Fen.wikipedia.org%3AHorn+effect" class="Z3988"></span></span> </li> <li id="cite_note-Attitudes-2"><span class="mw-cite-backlink">^ <a href="#cite_ref-Attitudes_2-0"><sup><i><b>a</b></i></sup></a> <a href="#cite_ref-Attitudes_2-1"><sup><i><b>b</b></i></sup></a></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFBelludi2013" class="citation web cs1">Belludi, Nagesh (30 April 2013). <a rel="nofollow" class="external text" href="http://www.rightattitudes.com/2010/04/30/rating-errors-halo-effect-horns-effect">"The Halo and Horns Effects [Rating Errors]"</a>. <i>Right Attitudes</i><span class="reference-accessdate">. Retrieved <span class="nowrap">15 August</span> 2017</span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=Right+Attitudes&rft.atitle=The+Halo+and+Horns+Effects+%5BRating+Errors%5D&rft.date=2013-04-30&rft.aulast=Belludi&rft.aufirst=Nagesh&rft_id=http%3A%2F%2Fwww.rightattitudes.com%2F2010%2F04%2F30%2Frating-errors-halo-effect-horns-effect&rfr_id=info%3Asid%2Fen.wikipedia.org%3AHorn+effect" class="Z3988"></span></span> </li> <li id="cite_note-JoshKennon-3"><span class="mw-cite-backlink">^ <a href="#cite_ref-JoshKennon_3-0"><sup><i><b>a</b></i></sup></a> <a href="#cite_ref-JoshKennon_3-1"><sup><i><b>b</b></i></sup></a></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFKennon2011" class="citation web cs1">Kennon, Joshua (12 November 2011). <a rel="nofollow" class="external text" href="https://www.joshuakennon.com/mental-model-horns-effect-and-halo-effect">"Mental Model: Horns Effect and Halo Effect"</a>. <i>www.joshuakennon.com</i><span class="reference-accessdate">. Retrieved <span class="nowrap">15 August</span> 2017</span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=www.joshuakennon.com&rft.atitle=Mental+Model%3A+Horns+Effect+and+Halo+Effect&rft.date=2011-11-12&rft.aulast=Kennon&rft.aufirst=Joshua&rft_id=https%3A%2F%2Fwww.joshuakennon.com%2Fmental-model-horns-effect-and-halo-effect&rfr_id=info%3Asid%2Fen.wikipedia.org%3AHorn+effect" class="Z3988"></span></span> </li> <li id="cite_note-study.com-4"><span class="mw-cite-backlink"><b><a href="#cite_ref-study.com_4-0">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFLong-Crowell" class="citation web cs1">Long-Crowell, Erin. <a rel="nofollow" class="external text" href="http://study.com/academy/lesson/the-halo-effect-definition-advantages-disadvantages.html">"The Halo Effect: Definition, Advantages & Disadvantages"</a>. <i>Psychology 104: Social Psychology</i>. study.com<span class="reference-accessdate">. Retrieved <span class="nowrap">September 30,</span> 2015</span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=Psychology+104%3A+Social+Psychology&rft.atitle=The+Halo+Effect%3A+Definition%2C+Advantages+%26+Disadvantages&rft.aulast=Long-Crowell&rft.aufirst=Erin&rft_id=http%3A%2F%2Fstudy.com%2Facademy%2Flesson%2Fthe-halo-effect-definition-advantages-disadvantages.html&rfr_id=info%3Asid%2Fen.wikipedia.org%3AHorn+effect" class="Z3988"></span></span> </li> <li id="cite_note-nisbett-5"><span class="mw-cite-backlink"><b><a href="#cite_ref-nisbett_5-0">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFNisbettWilson1977" class="citation journal cs1">Nisbett, Richard E; Wilson, Timothy D (1977). <a rel="nofollow" class="external text" href="https://deepblue.lib.umich.edu/bitstream/2027.42/92158/1/TheHaloEffect.pdf">"The halo effect: Evidence for unconscious alteration of judgments"</a> <span class="cs1-format">(PDF)</span>. <i>Journal of Personality and Social Psychology</i>. <b>35</b> (4). American Psychological Association: 250–56. <a href="/wiki/Doi_(identifier)" class="mw-redirect" title="Doi (identifier)">doi</a>:<a rel="nofollow" class="external text" href="https://doi.org/10.1037%2F0022-3514.35.4.250">10.1037/0022-3514.35.4.250</a>. <a href="/wiki/Hdl_(identifier)" class="mw-redirect" title="Hdl (identifier)">hdl</a>:<span class="id-lock-free" title="Freely accessible"><a rel="nofollow" class="external text" href="https://hdl.handle.net/2027.42%2F92158">2027.42/92158</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:17867385">17867385</a>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=article&rft.jtitle=Journal+of+Personality+and+Social+Psychology&rft.atitle=The+halo+effect%3A+Evidence+for+unconscious+alteration+of+judgments&rft.volume=35&rft.issue=4&rft.pages=250-56&rft.date=1977&rft_id=info%3Ahdl%2F2027.42%2F92158&rft_id=https%3A%2F%2Fapi.semanticscholar.org%2FCorpusID%3A17867385%23id-name%3DS2CID&rft_id=info%3Adoi%2F10.1037%2F0022-3514.35.4.250&rft.aulast=Nisbett&rft.aufirst=Richard+E&rft.au=Wilson%2C+Timothy+D&rft_id=https%3A%2F%2Fdeepblue.lib.umich.edu%2Fbitstream%2F2027.42%2F92158%2F1%2FTheHaloEffect.pdf&rfr_id=info%3Asid%2Fen.wikipedia.org%3AHorn+effect" class="Z3988"></span></span> </li> <li id="cite_note-6"><span class="mw-cite-backlink"><b><a href="#cite_ref-6">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://www.britannica.com/art/halo-art">"halo | History, Art, & Facts"</a>. <i>Encyclopedia Britannica</i><span class="reference-accessdate">. Retrieved <span class="nowrap">2019-02-03</span></span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=Encyclopedia+Britannica&rft.atitle=halo+%7C+History%2C+Art%2C+%26+Facts&rft_id=https%3A%2F%2Fwww.britannica.com%2Fart%2Fhalo-art&rfr_id=info%3Asid%2Fen.wikipedia.org%3AHorn+effect" class="Z3988"></span></span> </li> <li id="cite_note-ThornD-7"><span class="mw-cite-backlink"><b><a href="#cite_ref-ThornD_7-0">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFThorndike1920" class="citation cs2">Thorndike, EL (1920), <a rel="nofollow" class="external text" href="https://zenodo.org/record/1429134">"A constant error in psychological ratings"</a>, <i>Journal of Applied Psychology</i>, <b>4</b> (1): 25–29, <a href="/wiki/Doi_(identifier)" class="mw-redirect" title="Doi (identifier)">doi</a>:<a rel="nofollow" class="external text" href="https://doi.org/10.1037%2Fh0071663">10.1037/h0071663</a></cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=article&rft.jtitle=Journal+of+Applied+Psychology&rft.atitle=A+constant+error+in+psychological+ratings&rft.volume=4&rft.issue=1&rft.pages=25-29&rft.date=1920&rft_id=info%3Adoi%2F10.1037%2Fh0071663&rft.aulast=Thorndike&rft.aufirst=EL&rft_id=https%3A%2F%2Fzenodo.org%2Frecord%2F1429134&rfr_id=info%3Asid%2Fen.wikipedia.org%3AHorn+effect" class="Z3988"></span></span> </li> <li id="cite_note-10"><span class="mw-cite-backlink"><b><a href="#cite_ref-10">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://www.simplypsychology.org/halo-effect.html">"Halo Effect: Definition and Examples | Simply Psychology"</a>. <i>www.simplypsychology.org</i><span class="reference-accessdate">. Retrieved <span class="nowrap">2022-02-11</span></span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=www.simplypsychology.org&rft.atitle=Halo+Effect%3A+Definition+and+Examples+%7C+Simply+Psychology&rft_id=https%3A%2F%2Fwww.simplypsychology.org%2Fhalo-effect.html&rfr_id=info%3Asid%2Fen.wikipedia.org%3AHorn+effect" class="Z3988"></span></span> </li> <li id="cite_note-11"><span class="mw-cite-backlink"><b><a href="#cite_ref-11">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFGlennie2011" class="citation news cs1">Glennie, Jonathan (3 May 2011). <a rel="nofollow" class="external text" href="https://www.theguardian.com/global-development/poverty-matters/2011/may/03/hugo-chavez-reverso-halo-effect">"Hugo Chávez's reverse-halo effect"</a>. <i>The Guardian</i>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=article&rft.jtitle=The+Guardian&rft.atitle=Hugo+Ch%C3%A1vez%27s+reverse-halo+effect&rft.date=2011-05-03&rft.aulast=Glennie&rft.aufirst=Jonathan&rft_id=https%3A%2F%2Fwww.theguardian.com%2Fglobal-development%2Fpoverty-matters%2F2011%2Fmay%2F03%2Fhugo-chavez-reverso-halo-effect&rfr_id=info%3Asid%2Fen.wikipedia.org%3AHorn+effect" class="Z3988"></span></span> </li> <li id="cite_note-ostrove_sigall1975-12"><span class="mw-cite-backlink"><b><a href="#cite_ref-ostrove_sigall1975_12-0">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFOstroveSigall1975" class="citation journal cs1">Ostrove, Nancy; Sigall, Harold (1975). <a rel="nofollow" class="external text" href="https://www.researchgate.net/publication/232451231">"Beautiful but Dangerous: Effects of Offender Attractiveness and Nature of the Crime on Juridic Judgment"</a>. <i>Journal of Personality and Social Psychology</i>. <b>31</b> (3): 410–14. <a href="/wiki/Doi_(identifier)" class="mw-redirect" title="Doi (identifier)">doi</a>:<a rel="nofollow" class="external text" href="https://doi.org/10.1037%2Fh0076472">10.1037/h0076472</a>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=article&rft.jtitle=Journal+of+Personality+and+Social+Psychology&rft.atitle=Beautiful+but+Dangerous%3A+Effects+of+Offender+Attractiveness+and+Nature+of+the+Crime+on+Juridic+Judgment&rft.volume=31&rft.issue=3&rft.pages=410-14&rft.date=1975&rft_id=info%3Adoi%2F10.1037%2Fh0076472&rft.aulast=Ostrove&rft.aufirst=Nancy&rft.au=Sigall%2C+Harold&rft_id=https%3A%2F%2Fwww.researchgate.net%2Fpublication%2F232451231&rfr_id=info%3Asid%2Fen.wikipedia.org%3AHorn+effect" class="Z3988"></span></span> </li> </ol></div></div> <div class="navbox-styles"><style data-mw-deduplicate="TemplateStyles:r1129693374">.mw-parser-output .hlist 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style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Acquiescence_bias" title="Acquiescence bias">Acquiescence</a></li> <li><a href="/wiki/Ambiguity_effect" title="Ambiguity effect">Ambiguity</a></li> <li><a href="/wiki/Affinity_bias" title="Affinity bias">Affinity</a></li> <li><a href="/wiki/Anchoring_(cognitive_bias)" class="mw-redirect" title="Anchoring (cognitive bias)">Anchoring</a></li> <li><a href="/wiki/Attentional_bias" title="Attentional bias">Attentional</a></li> <li><a href="/wiki/Attribution_bias" title="Attribution bias">Attribution</a> <ul><li><a href="/wiki/Actor%E2%80%93observer_asymmetry" title="Actor–observer asymmetry">Actor–observer</a></li> <li><a href="/wiki/Fundamental_attribution_error" title="Fundamental attribution error">Correspondence</a></li></ul></li> <li><a href="/wiki/Authority_bias" title="Authority bias">Authority</a></li> <li><a href="/wiki/Automation_bias" title="Automation bias">Automation</a></li> <li><a href="/wiki/Availability_heuristic" title="Availability heuristic">Availability</a> <ul><li><a href="/wiki/Mean_world_syndrome" title="Mean world syndrome">Mean world</a></li></ul></li> <li><a href="/wiki/Belief_bias" title="Belief bias">Belief</a></li> <li><a href="/wiki/Bias_blind_spot" title="Bias blind spot">Blind spot</a></li> <li><a href="/wiki/Choice-supportive_bias" title="Choice-supportive bias">Choice-supportive</a></li> <li><a href="/wiki/Escalation_of_commitment" title="Escalation of commitment">Commitment</a></li> <li><a href="/wiki/Confirmation_bias" title="Confirmation bias">Confirmation</a> <ul><li><a href="/wiki/Selective_perception" title="Selective perception">Selective perception</a></li></ul></li> <li><a href="/wiki/Compassion_fade" title="Compassion fade">Compassion fade</a></li> <li><a href="/wiki/Congruence_bias" title="Congruence bias">Congruence</a></li> <li><a href="/wiki/Cultural_bias" title="Cultural bias">Cultural</a></li> <li><a href="/wiki/Declinism" title="Declinism">Declinism</a></li> <li><a href="/wiki/Distinction_bias" title="Distinction bias">Distinction</a></li> <li><a href="/wiki/Dunning%E2%80%93Kruger_effect" title="Dunning–Kruger effect">Dunning–Kruger</a></li> <li><a href="/wiki/Egocentric_bias" title="Egocentric bias">Egocentric</a> <ul><li><a href="/wiki/Curse_of_knowledge" title="Curse of knowledge">Curse of knowledge</a></li></ul></li> <li><a href="/wiki/Emotional_bias" title="Emotional bias">Emotional</a></li> <li><a href="/wiki/Extrinsic_incentives_bias" title="Extrinsic incentives bias">Extrinsic incentives</a></li> <li><a href="/wiki/Fading_affect_bias" title="Fading affect bias">Fading affect</a></li> <li><a href="/wiki/Framing_effect_(psychology)" title="Framing effect (psychology)">Framing</a></li> <li><a href="/wiki/Frequency_illusion" title="Frequency illusion">Frequency</a></li> <li><a href="/wiki/Frog_pond_effect" title="Frog pond effect">Frog pond effect</a></li> <li><a href="/wiki/Halo_effect" title="Halo effect">Halo effect</a></li> <li><a href="/wiki/Hindsight_bias" title="Hindsight bias">Hindsight</a></li> <li><a class="mw-selflink selflink">Horn effect</a></li> <li><a href="/wiki/Hostile_attribution_bias" title="Hostile attribution bias">Hostile attribution</a></li> <li><a href="/wiki/Impact_bias" title="Impact bias">Impact</a></li> <li><a href="/wiki/Implicit_stereotype" title="Implicit stereotype">Implicit</a></li> <li><a href="/wiki/In-group_favoritism" title="In-group favoritism">In-group</a></li> <li><a href="/wiki/Intentionality_bias" title="Intentionality bias">Intentionality</a></li> <li><a href="/wiki/Illusion_of_transparency" title="Illusion of transparency">Illusion of transparency</a></li> <li><a href="/wiki/Mean_world_syndrome" title="Mean world syndrome">Mean world syndrome</a></li> <li><a href="/wiki/Mere-exposure_effect" title="Mere-exposure effect">Mere-exposure effect</a></li> <li><a href="/wiki/Narrative_bias" title="Narrative bias">Narrative</a></li> <li><a href="/wiki/Negativity_bias" title="Negativity bias">Negativity</a></li> <li><a href="/wiki/Normalcy_bias" title="Normalcy bias">Normalcy</a></li> <li><a href="/wiki/Omission_bias" title="Omission bias">Omission</a></li> <li><a href="/wiki/Optimism_bias" title="Optimism bias">Optimism</a></li> <li><a href="/wiki/Out-group_homogeneity" title="Out-group homogeneity">Out-group homogeneity</a></li> <li><a href="/wiki/Outcome_bias" title="Outcome bias">Outcome</a></li> <li><a href="/wiki/Overton_window" title="Overton window">Overton window</a></li> <li><a href="/wiki/Precision_bias" title="Precision bias">Precision</a></li> <li><a href="/wiki/Present_bias" title="Present bias">Present</a></li> <li><a href="/wiki/Pro-innovation_bias" title="Pro-innovation bias">Pro-innovation</a></li> <li><a href="/wiki/Proximity_bias" title="Proximity bias">Proximity</a></li> <li><a href="/wiki/Response_bias" title="Response bias">Response</a></li> <li><a href="/wiki/Restraint_bias" title="Restraint bias">Restraint</a></li> <li><a href="/wiki/Self-serving_bias" title="Self-serving bias">Self-serving</a></li> <li><a href="/wiki/Social_comparison_bias" title="Social comparison bias">Social comparison</a></li> <li><a href="/wiki/Social_influence_bias" title="Social influence bias">Social influence bias</a></li> <li><a href="/wiki/Spotlight_effect" title="Spotlight effect">Spotlight</a></li> <li><a href="/wiki/Status_quo_bias" title="Status quo bias">Status quo</a></li> <li><a href="/wiki/Attribute_substitution" title="Attribute substitution">Substitution</a></li> <li><a href="/wiki/Time-saving_bias" title="Time-saving bias">Time-saving</a></li> <li><a href="/wiki/Trait_ascription_bias" title="Trait ascription bias">Trait ascription</a></li> <li><a href="/wiki/Turkey_illusion" title="Turkey illusion">Turkey illusion</a></li> <li><a href="/wiki/Von_Restorff_effect" title="Von Restorff effect">von Restorff effect</a></li> <li><a href="/wiki/Zero-risk_bias" title="Zero-risk bias">Zero-risk</a></li> <li><a href="/wiki/Cognitive_bias_in_animals" title="Cognitive bias in animals">In animals</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Bias_(statistics)" title="Bias (statistics)">Statistical biases</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/Bias_of_an_estimator" title="Bias of an estimator">Estimator</a></li> <li><a href="/wiki/Forecast_bias" title="Forecast bias">Forecast</a></li> <li><a href="/wiki/Healthy_user_bias" title="Healthy user bias">Healthy user</a></li> <li><a href="/wiki/Information_bias_(epidemiology)" title="Information bias (epidemiology)">Information</a> <ul><li><a href="/wiki/Information_bias_(psychology)" title="Information bias (psychology)">Psychological</a></li></ul></li> <li><a href="/wiki/Lead_time_bias" title="Lead time bias">Lead time</a></li> <li><a href="/wiki/Length_time_bias" title="Length time bias">Length time</a></li> <li><a href="/wiki/Participation_bias" title="Participation bias">Non-response</a></li> <li><a href="/wiki/Observer_bias" title="Observer bias">Observer</a></li> <li><a href="/wiki/Omitted-variable_bias" title="Omitted-variable bias">Omitted-variable</a></li> <li><a href="/wiki/Participation_bias" title="Participation bias">Participation</a></li> <li><a href="/wiki/Recall_bias" title="Recall bias">Recall</a></li> <li><a href="/wiki/Sampling_bias" title="Sampling bias">Sampling</a></li> <li><a href="/wiki/Selection_bias" title="Selection bias">Selection</a></li> <li><a href="/wiki/Self-selection_bias" title="Self-selection bias">Self-selection</a></li> <li><a href="/wiki/Social-desirability_bias" title="Social-desirability bias">Social desirability</a></li> <li><a href="/wiki/Spectrum_bias" title="Spectrum bias">Spectrum</a></li> <li><a href="/wiki/Survivorship_bias" title="Survivorship bias">Survivorship</a></li> <li><a href="/wiki/Systematic_error" class="mw-redirect" title="Systematic error">Systematic error</a></li> <li><a href="/wiki/Systemic_bias" title="Systemic bias">Systemic</a></li> <li><a href="/wiki/Verification_bias" title="Verification bias">Verification</a></li> <li><a href="/wiki/Wet_bias" title="Wet bias">Wet</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Other biases</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/Academic_bias" title="Academic bias">Academic</a></li> <li><a href="/wiki/Basking_in_reflected_glory" title="Basking in reflected glory">Basking in reflected glory</a></li> <li><i><a href="/wiki/D%C3%A9formation_professionnelle" title="Déformation professionnelle">Déformation professionnelle</a></i></li> <li><a href="/wiki/Funding_bias" title="Funding bias">Funding</a></li> <li><a href="/wiki/FUTON_bias" class="mw-redirect" title="FUTON bias">FUTON</a></li> <li><a href="/wiki/Inductive_bias" title="Inductive bias">Inductive</a></li> <li><a href="/wiki/Infrastructure_bias" title="Infrastructure bias">Infrastructure</a></li> <li><a href="/wiki/Inherent_bias" title="Inherent bias">Inherent</a></li> <li><a href="/wiki/Bias_in_education" class="mw-redirect" title="Bias in education">In education</a></li> <li><a href="/wiki/Liking_gap" title="Liking gap">Liking gap</a></li> <li><a href="/wiki/Media_bias" title="Media bias">Media</a> <ul><li><a href="/wiki/False_balance" title="False balance">False balance</a></li> <li><a href="/wiki/United_States_news_media_and_the_Vietnam_War" title="United States news media and the Vietnam War">Vietnam War</a></li> <li><a href="/wiki/Media_of_Norway" class="mw-redirect" title="Media of Norway">Norway</a></li> <li><a href="/wiki/Media_bias_in_South_Asia" title="Media bias in South Asia">South Asia</a></li> <li><a href="/wiki/Media_of_Sweden" class="mw-redirect" title="Media of Sweden">Sweden</a></li> <li><a href="/wiki/Media_bias_in_the_United_States" title="Media bias in the United States">United States</a></li> <li><a href="/wiki/Media_coverage_of_the_Arab%E2%80%93Israeli_conflict" class="mw-redirect" title="Media coverage of the Arab–Israeli conflict">Arab–Israeli conflict</a></li> <li><a href="/wiki/Media_portrayal_of_the_Ukrainian_crisis" class="mw-redirect" title="Media portrayal of the Ukrainian crisis">Ukraine</a></li></ul></li> <li><a href="/wiki/Net_bias" title="Net bias">Net</a></li> <li><a href="/wiki/Political_bias" title="Political bias">Political bias</a></li> <li><a href="/wiki/Publication_bias" title="Publication bias">Publication</a></li> <li><a href="/wiki/Reporting_bias" title="Reporting bias">Reporting</a></li> <li><a href="/wiki/White_hat_bias" title="White hat bias">White hat</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Bias reduction</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/Cognitive_bias_mitigation" title="Cognitive bias mitigation">Cognitive bias mitigation</a></li> <li><a href="/wiki/Debiasing" title="Debiasing">Debiasing</a></li> <li><a href="/wiki/Heuristic_(psychology)" title="Heuristic (psychology)">Heuristics in judgment and decision-making</a></li></ul> </div></td></tr><tr><td class="navbox-abovebelow hlist" colspan="2"><div> <ul><li>Lists: <a href="/wiki/List_of_cognitive_biases" title="List of cognitive biases">General</a></li> <li><a href="/wiki/List_of_cognitive_biases#Memory_biases" title="List of cognitive biases">Memory</a></li></ul> </div></td></tr></tbody></table></div>    </div><noscript><img src="https://login.wikimedia.org/wiki/Special:CentralAutoLogin/start?type=1x1" alt="" width="1" height="1" style="border: none; position: absolute;"></noscript> <div class="printfooter" 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