{"id":8088,"date":"2019-05-22T16:03:54","date_gmt":"2019-05-22T16:03:54","guid":{"rendered":"http:\/\/www.lancaster.ac.uk\/fas\/psych\/glossary\/greenhouse-geisser_epsilon\/"},"modified":"2019-05-22T16:03:54","modified_gmt":"2019-05-22T16:03:54","slug":"greenhouse-geisser_epsilon","status":"publish","type":"post","link":"https:\/\/www.lancaster.ac.uk\/fas\/psych\/glossary\/greenhouse-geisser_epsilon\/","title":{"rendered":"Greenhouse-Geisser epsilon"},"content":{"rendered":"<p>A correction factor that is smaller than 1 if the sphericity assumption in an ANOVA is violated. &nbsp;The factor is multiplied with F, making the test more conservative. &nbsp;It is a method of correcting the degrees of freedom of the within-subject F-tests in the analysis of variance of repeated measures or longitudinal data so as to allow for departures of the variance-covariance matrix from the assumption of sphericity.&nbsp;<\/p>\n<p>See <a href=\"analysis_of_variance_-anova-\">Analysis of variance (ANOVA)<\/a>, <a href=\"hunyh-feldt_epsilon\">Hunyh-Feldt epsilon<\/a>, <a href=\"mauchly_test\">Mauchly test<\/a>, Repeated measures Sphericity, <a href=\"sphericity_assumption\">Sphericity assumption<\/a><\/p>\n<p><\/p>\n<p><\/p>\n<p><\/body><\/html><\/p>\n","protected":false},"excerpt":{"rendered":"<p>A correction factor that is smaller than 1 if the sphericity assumption in an ANOVA is violated. &nbsp;The factor is multiplied with F, making the test more conservative. &nbsp;It is a method of correcting the degrees of freedom of the within-subject F-tests in the analysis of variance of repeated measures or longitudinal data so as &hellip; <\/p>\n<p class=\"link-more\"><a href=\"https:\/\/www.lancaster.ac.uk\/fas\/psych\/glossary\/greenhouse-geisser_epsilon\/\" class=\"more-link\">Continue reading<span class=\"screen-reader-text\"> &#8220;Greenhouse-Geisser epsilon&#8221;<\/span><\/a><\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[2],"class_list":["post-8088","post","type-post","status-publish","format-standard","hentry","category-uncategorized","tag-glossary","entry"],"_links":{"self":[{"href":"https:\/\/www.lancaster.ac.uk\/fas\/psych\/glossary\/wp-json\/wp\/v2\/posts\/8088","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.lancaster.ac.uk\/fas\/psych\/glossary\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.lancaster.ac.uk\/fas\/psych\/glossary\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.lancaster.ac.uk\/fas\/psych\/glossary\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.lancaster.ac.uk\/fas\/psych\/glossary\/wp-json\/wp\/v2\/comments?post=8088"}],"version-history":[{"count":0,"href":"https:\/\/www.lancaster.ac.uk\/fas\/psych\/glossary\/wp-json\/wp\/v2\/posts\/8088\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.lancaster.ac.uk\/fas\/psych\/glossary\/wp-json\/wp\/v2\/media?parent=8088"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.lancaster.ac.uk\/fas\/psych\/glossary\/wp-json\/wp\/v2\/categories?post=8088"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.lancaster.ac.uk\/fas\/psych\/glossary\/wp-json\/wp\/v2\/tags?post=8088"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}