{"id":7205,"date":"2026-09-16T18:13:35","date_gmt":"2026-09-16T18:13:35","guid":{"rendered":"http:\/\/french.arabpsychology.com\/statistics\/kurtosis-peut-il-etre-negatif\/"},"modified":"2026-09-16T18:13:41","modified_gmt":"2026-09-16T18:13:41","slug":"kurtosis-peut-il-etre-negatif","status":"publish","type":"psych_stat","link":"https:\/\/french.arabpsychology.com\/?psych_stat=kurtosis-peut-il-etre-negatif","title":{"rendered":"Le kurtosis peut-il \u00eatre n\u00e9gatif ?"},"content":{"rendered":"<p>[Diagnostic initial] : Identification d&rsquo;un exc\u00e8s de kurtosis n\u00e9gatif (gamma_2 = 100) ET distribution platykurtique sym\u00e9trique ?<br \/>\n  \u2502     \u251c\u2500\u2500 OUI : Utiliser les tests param\u00e9triques usuels (t-test, ANOVA) sans crainte.<br \/>\n  \u2502     \u2502         Sous SEM : sp\u00e9cifier les estimateurs robustes (MLM \/ Satorra-Bentler).<br \/>\n  \u2502     \u2514\u2500\u2500 NON (N &lt; 30 ou asym\u00e9trie conjointe importante) : Poursuivre vers l&#039;\u00c9tape 4.<br \/>\n         |<br \/>\n         v<br \/>\n[\u00c9tape 4 : S\u00e9lection des rem\u00e9diations non param\u00e9triques]<br \/>\n  \u2514\u2500\u2500 Mobiliser le bootstrap non param\u00e9trique (BCa \u00e0 10 000 it\u00e9rations)<br \/>\n      ou recourir aux tests d&#039;hypoth\u00e8ses fond\u00e9s sur les rangs (Mann-Whitney \/ Kruskal-Wallis).<\/p>\n<figure class=\"wpt-preserved-image\"><img fetchpriority=\"high\" decoding=\"async\" src=\"http:\/\/french.arabpsychology.com\/wp-content\/uploads\/2026\/09\/kurtosis1.png\" alt=\"Example of kurtosis in normal distribution\" \/><\/figure>\n<figure class=\"wpt-preserved-image\"><img loading=\"lazy\" decoding=\"async\" src=\"http:\/\/french.arabpsychology.com\/wp-content\/uploads\/2026\/09\/kurtosis2.png\" alt=\"\" \/><\/figure>\n<figure class=\"wpt-preserved-image\"><img loading=\"lazy\" decoding=\"async\" src=\"http:\/\/french.arabpsychology.com\/wp-content\/uploads\/2026\/09\/kurtosis3.png\" alt=\"Example of negative kurtosis\" \/><\/figure>\n","protected":false},"excerpt":{"rendered":"<p>Analyse approfondie de l&rsquo;aplatissement n\u00e9gatif en statistique et psychom\u00e9trie : d\u00e9finition, causes math\u00e9matiques, implications empiriques et diagnostic.<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"closed","template":"","categories":[1881,2,359],"tags":[8681,5733,8682,16,2344],"class_list":["post-7205","psych_stat","type-psych_stat","status-publish","hentry","category-methodologie-de-la-recherche","category-psychometrie","category-statistiques-appliquees","tag-aplatissement","tag-kurtosis","tag-platykurtique","tag-psychometrie","tag-statistiques"],"_links":{"self":[{"href":"https:\/\/french.arabpsychology.com\/index.php?rest_route=\/wp\/v2\/psych_stat\/7205","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/french.arabpsychology.com\/index.php?rest_route=\/wp\/v2\/psych_stat"}],"about":[{"href":"https:\/\/french.arabpsychology.com\/index.php?rest_route=\/wp\/v2\/types\/psych_stat"}],"author":[{"embeddable":true,"href":"https:\/\/french.arabpsychology.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/french.arabpsychology.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=7205"}],"version-history":[{"count":1,"href":"https:\/\/french.arabpsychology.com\/index.php?rest_route=\/wp\/v2\/psych_stat\/7205\/revisions"}],"predecessor-version":[{"id":7209,"href":"https:\/\/french.arabpsychology.com\/index.php?rest_route=\/wp\/v2\/psych_stat\/7205\/revisions\/7209"}],"wp:attachment":[{"href":"https:\/\/french.arabpsychology.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=7205"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/french.arabpsychology.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=7205"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/french.arabpsychology.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=7205"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}