{"id":17396,"date":"2020-10-31T15:52:47","date_gmt":"2020-10-31T15:52:47","guid":{"rendered":"http:\/\/www.wjst.de\/blog\/?p=17396"},"modified":"2022-07-19T11:41:38","modified_gmt":"2022-07-19T09:41:38","slug":"everybody-knows-about-confounder-but-what-is-a-collider","status":"publish","type":"post","link":"https:\/\/www.wjst.de\/blog\/sciencesurf\/2020\/10\/everybody-knows-about-confounder-but-what-is-a-collider\/","title":{"rendered":"Everybody knows about confounder but what is a collider?"},"content":{"rendered":"<p>Here is the best explanation of a collider written by\u00a0 Julia Rohrer at <a href=\"http:\/\/www.the100.ci\/2017\/03\/14\/that-one-weird-third-variable-problem-nobody-ever-mentions-conditioning-on-a-collider\/\">www.the100.ci<\/a><\/p>\n<blockquote><p>Whenever X1 (conscientiousness) and X2 (intelligence) both cause Y (college attendance) in some manner, conditioning on Y will bias the relationship between X1 and X2 and potentially introduce a spurious association (or hide an existing link between X1 and X2, or exaggerate an existing link, or reverse the direction of the association\u2026)<\/p><\/blockquote>\n<p>The cartoon makes it even clearer &#8211; confounder act on exposure and outcome, while collider condition on exposure and outcome.<\/p>\n<figure id=\"attachment_17400\" aria-describedby=\"caption-attachment-17400\" style=\"width: 620px\" class=\"wp-caption alignnone\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-17400 size-medium\" src=\"https:\/\/www.wjst.de\/blog\/wp-content\/uploads\/2020\/10\/collider-620x265.png\" alt=\"\" width=\"620\" height=\"265\" srcset=\"https:\/\/www.wjst.de\/blog\/wp-content\/uploads\/2020\/10\/collider-620x265.png 620w, https:\/\/www.wjst.de\/blog\/wp-content\/uploads\/2020\/10\/collider-1172x500.png 1172w, https:\/\/www.wjst.de\/blog\/wp-content\/uploads\/2020\/10\/collider-768x328.png 768w, https:\/\/www.wjst.de\/blog\/wp-content\/uploads\/2020\/10\/collider.png 1200w\" sizes=\"auto, (max-width: 620px) 100vw, 620px\" \/><figcaption id=\"caption-attachment-17400\" class=\"wp-caption-text\">https:\/\/catalogofbias.org\/biases\/confounding\/<\/figcaption><\/figure>\n\n<p>&nbsp;<\/p>\n<div class=\"bottom-note\">\n  <span class=\"mod1\">CC-BY-NC Science Surf , accessed 01.05.2026<\/span>\n <\/div>","protected":false},"excerpt":{"rendered":"<p>Here is the best explanation of a collider written by\u00a0 Julia Rohrer at www.the100.ci Whenever X1 (conscientiousness) and X2 (intelligence) both cause Y (college attendance) in some manner, conditioning on Y will bias the relationship between X1 and X2 and potentially introduce a spurious association (or hide an existing link between X1 and X2, or &hellip; <a href=\"https:\/\/www.wjst.de\/blog\/sciencesurf\/2020\/10\/everybody-knows-about-confounder-but-what-is-a-collider\/\" class=\"more-link\">Continue reading <span class=\"screen-reader-text\">Everybody knows about confounder but what is a collider?<\/span> <span class=\"meta-nav\">&rarr;<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[8],"tags":[1096],"class_list":["post-17396","post","type-post","status-publish","format-standard","hentry","category-asthma-allergy","tag-farming"],"_links":{"self":[{"href":"https:\/\/www.wjst.de\/blog\/wp-json\/wp\/v2\/posts\/17396","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.wjst.de\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.wjst.de\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.wjst.de\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.wjst.de\/blog\/wp-json\/wp\/v2\/comments?post=17396"}],"version-history":[{"count":7,"href":"https:\/\/www.wjst.de\/blog\/wp-json\/wp\/v2\/posts\/17396\/revisions"}],"predecessor-version":[{"id":20231,"href":"https:\/\/www.wjst.de\/blog\/wp-json\/wp\/v2\/posts\/17396\/revisions\/20231"}],"wp:attachment":[{"href":"https:\/\/www.wjst.de\/blog\/wp-json\/wp\/v2\/media?parent=17396"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.wjst.de\/blog\/wp-json\/wp\/v2\/categories?post=17396"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.wjst.de\/blog\/wp-json\/wp\/v2\/tags?post=17396"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}