{"id":1871,"date":"2021-06-13T12:07:06","date_gmt":"2021-06-13T11:07:06","guid":{"rendered":"https:\/\/www.psyctc.org\/psyctc\/?post_type=docs&#038;p=1871"},"modified":"2021-11-14T16:55:43","modified_gmt":"2021-11-14T16:55:43","password":"","slug":"floor-and-ceiling-effects","status":"publish","type":"docs","link":"https:\/\/www.psyctc.org\/psyctc\/glossary2\/floor-and-ceiling-effects\/","title":{"rendered":"Floor and ceiling effects"},"content":{"rendered":"\n<p>A floor effect in multi-item outcome measures occurs when most people choose the lowest possible scoring response on an item.  A ceiling effect is most people choosing the highest scoring option. A floor response leaves no scope to record improvement on that item and a ceiling response leaves no room to show deterioration. Both limit the <strong>Variance<\/strong> of scores.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">Try also &#8230;<\/h4>\n\n\n\n<p><a href=\"https:\/\/www.psyctc.org\/psyctc\/glossary2\/variance\/\" data-type=\"docs\" data-id=\"2435\">Variance<\/a><\/p>\n\n\n\n<h4 class=\"wp-block-heading\">Chapters<\/h4>\n\n\n\n<p>Nothing here yet!<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">Online applications<\/h4>\n\n\n\n<p>At some point: online form which would flag up these effects for items.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>A floor effect in multi-item outcome measures occurs when most people choose the lowest possible scoring response on an item. A ceiling effect is most people choosing the highest scoring option. A floor response leaves no scope to record improvement on that item and a ceiling response leaves no room to show deterioration. Both limit &hellip; <a href=\"https:\/\/www.psyctc.org\/psyctc\/glossary2\/floor-and-ceiling-effects\/\" class=\"more-link\">Continue reading <span class=\"screen-reader-text\">Floor and ceiling effects<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"closed","template":"","meta":{"footnotes":""},"doc_category":[18],"glossaries":[],"doc_tag":[],"knowledge_base":[],"class_list":["post-1871","docs","type-docs","status-publish","hentry","doc_category-om-book"],"year_month":"2026-04","word_count":81,"total_views":"2230","reactions":{"happy":"0","normal":"0","sad":"0"},"author_info":{"name":"chris","author_nicename":"chris","author_url":"https:\/\/www.psyctc.org\/psyctc\/author\/chris\/"},"doc_category_info":[{"term_name":"All OM book glossary entries","term_url":"https:\/\/www.psyctc.org\/psyctc\/glossary\/non-knowledgebase\/om-book\/"}],"doc_tag_info":[],"knowledge_base_info":[],"knowledge_base_slug":[],"_links":{"self":[{"href":"https:\/\/www.psyctc.org\/psyctc\/wp-json\/wp\/v2\/docs\/1871","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.psyctc.org\/psyctc\/wp-json\/wp\/v2\/docs"}],"about":[{"href":"https:\/\/www.psyctc.org\/psyctc\/wp-json\/wp\/v2\/types\/docs"}],"author":[{"embeddable":true,"href":"https:\/\/www.psyctc.org\/psyctc\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.psyctc.org\/psyctc\/wp-json\/wp\/v2\/comments?post=1871"}],"version-history":[{"count":2,"href":"https:\/\/www.psyctc.org\/psyctc\/wp-json\/wp\/v2\/docs\/1871\/revisions"}],"predecessor-version":[{"id":2674,"href":"https:\/\/www.psyctc.org\/psyctc\/wp-json\/wp\/v2\/docs\/1871\/revisions\/2674"}],"wp:attachment":[{"href":"https:\/\/www.psyctc.org\/psyctc\/wp-json\/wp\/v2\/media?parent=1871"}],"wp:term":[{"taxonomy":"doc_category","embeddable":true,"href":"https:\/\/www.psyctc.org\/psyctc\/wp-json\/wp\/v2\/doc_category?post=1871"},{"taxonomy":"glossaries","embeddable":true,"href":"https:\/\/www.psyctc.org\/psyctc\/wp-json\/wp\/v2\/glossaries?post=1871"},{"taxonomy":"doc_tag","embeddable":true,"href":"https:\/\/www.psyctc.org\/psyctc\/wp-json\/wp\/v2\/doc_tag?post=1871"},{"taxonomy":"knowledge_base","embeddable":true,"href":"https:\/\/www.psyctc.org\/psyctc\/wp-json\/wp\/v2\/knowledge_base?post=1871"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}