Very geeky stuff this. Sobel’s test is a parametric null hypothesis test of the significance of a mediation effect, i.e. that a third variable may be contributing to, i.e. mediating, the relationship between a first and second variable. If this is gobbledygook either, don’t worry, or, go and read up the entry about mediation!<\/p>\n\n\n\n
As Sobel’s test is based on a model assuming population distributions of all three variables are Gaussian, it is much better, if you have raw data, to test mediation using bootstrapping to get confidence intervals.<\/p>\n\n\n\n
Bootstrapping<\/a> Not mentioned in the OMbook!<\/p>\n\n\n\n None currently.<\/p>\n\n\n\n First created 5.x.24.<\/p>\n","protected":false},"excerpt":{"rendered":" Very geeky stuff this. Sobel’s test is a parametric null hypothesis test of the significance of a mediation effect, i.e. that a third variable may be contributing to, i.e. mediating, the relationship between a first and second variable. If this is gobbledygook either, don’t worry, or, go and read up the entry about mediation! Details … Continue reading Sobel’s test<\/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-4464","docs","type-docs","status-publish","hentry","doc_category-om-book"],"year_month":"2026-04","word_count":118,"total_views":"621","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\/4464","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=4464"}],"version-history":[{"count":1,"href":"https:\/\/www.psyctc.org\/psyctc\/wp-json\/wp\/v2\/docs\/4464\/revisions"}],"predecessor-version":[{"id":4465,"href":"https:\/\/www.psyctc.org\/psyctc\/wp-json\/wp\/v2\/docs\/4464\/revisions\/4465"}],"wp:attachment":[{"href":"https:\/\/www.psyctc.org\/psyctc\/wp-json\/wp\/v2\/media?parent=4464"}],"wp:term":[{"taxonomy":"doc_category","embeddable":true,"href":"https:\/\/www.psyctc.org\/psyctc\/wp-json\/wp\/v2\/doc_category?post=4464"},{"taxonomy":"glossaries","embeddable":true,"href":"https:\/\/www.psyctc.org\/psyctc\/wp-json\/wp\/v2\/glossaries?post=4464"},{"taxonomy":"doc_tag","embeddable":true,"href":"https:\/\/www.psyctc.org\/psyctc\/wp-json\/wp\/v2\/doc_tag?post=4464"},{"taxonomy":"knowledge_base","embeddable":true,"href":"https:\/\/www.psyctc.org\/psyctc\/wp-json\/wp\/v2\/knowledge_base?post=4464"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
Confidence intervals<\/a>
Gaussian (“Normal”) distributions<\/a>
Mediation
Null hypothesis<\/a>
Null hypothesis significance testing (NHST) paradigm<\/a><\/p>\n\n\n\nChapters<\/h4>\n\n\n\n
Online resources<\/h4>\n\n\n\n
Dates<\/h4>\n\n\n\n