{"id":8428,"date":"2019-05-22T16:07:36","date_gmt":"2019-05-22T16:07:36","guid":{"rendered":"http:\/\/www.lancaster.ac.uk\/fas\/psych\/glossary\/missing_at_random_-mar\/"},"modified":"2019-05-22T16:07:36","modified_gmt":"2019-05-22T16:07:36","slug":"missing_at_random_-mar","status":"publish","type":"post","link":"https:\/\/www.lancaster.ac.uk\/fas\/psych\/glossary\/missing_at_random_-mar\/","title":{"rendered":"Missing at random (MAR)"},"content":{"rendered":"<p>The assumption that the sub-set of persons for whom data are not measured (i.e., incomplete or missing), data can be indicated by scores on variables that are measured (i.e., complete). &nbsp;The MAR assumption is different than the traditional assumption of &#8216;missing completely at random&#8217; (MCAR), and it permits a correction for the bias due to selection using maximum-likelihood estimation (MLE). &nbsp;For complex data sets, there are <a href=\"http:\/\/ssc.utexas.edu\/software\/faqs\/general\" target=\"_self\" data-editable-link=\"http:\/\/ssc.utexas.edu\/software\/faqs\/general&amp;target=_self\" rel=\"noopener noreferrer\">software<\/a> available for dealing with missing data in a principled way. &nbsp;&nbsp;<\/p>\n<p>See Multilevel modeling<\/p>\n<p><\/p>\n<p><\/p>\n<p><\/body><\/html><\/p>\n","protected":false},"excerpt":{"rendered":"<p>The assumption that the sub-set of persons for whom data are not measured (i.e., incomplete or missing), data can be indicated by scores on variables that are measured (i.e., complete). &nbsp;The MAR assumption is different than the traditional assumption of &#8216;missing completely at random&#8217; (MCAR), and it permits a correction for the bias due to &hellip; <\/p>\n<p class=\"link-more\"><a href=\"https:\/\/www.lancaster.ac.uk\/fas\/psych\/glossary\/missing_at_random_-mar\/\" class=\"more-link\">Continue reading<span class=\"screen-reader-text\"> &#8220;Missing at random (MAR)&#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-8428","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\/8428","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=8428"}],"version-history":[{"count":0,"href":"https:\/\/www.lancaster.ac.uk\/fas\/psych\/glossary\/wp-json\/wp\/v2\/posts\/8428\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.lancaster.ac.uk\/fas\/psych\/glossary\/wp-json\/wp\/v2\/media?parent=8428"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.lancaster.ac.uk\/fas\/psych\/glossary\/wp-json\/wp\/v2\/categories?post=8428"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.lancaster.ac.uk\/fas\/psych\/glossary\/wp-json\/wp\/v2\/tags?post=8428"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}