{"id":3497,"date":"2012-12-24T04:16:32","date_gmt":"2012-12-24T03:16:32","guid":{"rendered":"http:\/\/emilkirkegaard.dk\/en\/?p=3497"},"modified":"2012-12-24T04:16:32","modified_gmt":"2012-12-24T03:16:32","slug":"paper-intelligence-and-semen-quality-are-positively-correlated","status":"publish","type":"post","link":"https:\/\/emilkirkegaard.dk\/en\/2012\/12\/paper-intelligence-and-semen-quality-are-positively-correlated\/","title":{"rendered":"Paper: Intelligence and semen quality are positively correlated"},"content":{"rendered":"<p><a href=\"http:\/\/emilkirkegaard.dk\/en\/wp-content\/uploads\/Intelligence-and-semen-quality-are-positively-correlated.pdf\">Intelligence and semen quality are positively correlated<\/a><\/p>\n<p><span style=\"color: #800000;\">Human cognitive abilities inter-correlate to form a positive matrix, from which a large \ufb01rst<\/span><br \/>\n<span style=\"color: #800000;\">factor, called \u2018Spearman&#8217;s g\u2019 or general intelligence, can be extracted. General intelligence itself<\/span><br \/>\n<span style=\"color: #800000;\">is correlated with many important health outcomes including cardio-vascular function and<\/span><br \/>\n<span style=\"color: #800000;\">longevity. However, the important evolutionary question of whether intelligence is a \ufb01tness-<\/span><br \/>\n<span style=\"color: #800000;\">related trait has not been tested directly, let alone answered. If the correlations among cognitive<\/span><br \/>\n<span style=\"color: #800000;\">abilities are part of a larger matrix of positive associations among \ufb01tness-related traits, then<\/span><br \/>\n<span style=\"color: #800000;\">intelligence ought to correlate with seemingly unrelated traits that affect \ufb01tness\u2014such as<\/span><br \/>\n<span style=\"color: #800000;\">semen quality. We found signi\ufb01cant positive correlations between intelligence and 3 key<\/span><br \/>\n<span style=\"color: #800000;\">indices of semen quality: log sperm concentration (r=.15, p=.002), log sperm count (r=.19,<\/span><br \/>\n<span style=\"color: #800000;\">pb.001), and sperm motility (r=.14, p=.002) in a large sample of US Army Veterans. None<\/span><br \/>\n<span style=\"color: #800000;\">was mediated by age, body mass index, days of sexual abstinence, service in Vietnam, or use of<\/span><br \/>\n<span style=\"color: #800000;\">alcohol, tobacco, marijuana, or hard drugs. These results suggest that a phenotype-wide \ufb01tness<\/span><br \/>\n<span style=\"color: #800000;\">factor may contribute to the association between intelligence and health. Clarifying whether a<\/span><br \/>\n<span style=\"color: #800000;\">\ufb01tness factor exists is important theoretically for understanding the genomic architecture of<\/span><br \/>\n<span style=\"color: #800000;\">\ufb01tness-related traits, and practically for understanding patterns of human physical and<\/span><br \/>\n<span style=\"color: #800000;\">psychological health.<\/span><\/p>\n<p>Odd.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Intelligence and semen quality are positively correlated Human cognitive abilities inter-correlate to form a positive matrix, from which a large \ufb01rst factor, called \u2018Spearman&#8217;s g\u2019 or general intelligence, can be extracted. General intelligence itself is correlated with many important health outcomes including cardio-vascular function and longevity. However, the important evolutionary question of whether intelligence is [&hellip;]<\/p>\n","protected":false},"author":17,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1839],"tags":[],"class_list":["post-3497","post","type-post","status-publish","format-standard","hentry","category-psychometics","entry"],"_links":{"self":[{"href":"https:\/\/emilkirkegaard.dk\/en\/wp-json\/wp\/v2\/posts\/3497","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/emilkirkegaard.dk\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/emilkirkegaard.dk\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/emilkirkegaard.dk\/en\/wp-json\/wp\/v2\/users\/17"}],"replies":[{"embeddable":true,"href":"https:\/\/emilkirkegaard.dk\/en\/wp-json\/wp\/v2\/comments?post=3497"}],"version-history":[{"count":1,"href":"https:\/\/emilkirkegaard.dk\/en\/wp-json\/wp\/v2\/posts\/3497\/revisions"}],"predecessor-version":[{"id":3499,"href":"https:\/\/emilkirkegaard.dk\/en\/wp-json\/wp\/v2\/posts\/3497\/revisions\/3499"}],"wp:attachment":[{"href":"https:\/\/emilkirkegaard.dk\/en\/wp-json\/wp\/v2\/media?parent=3497"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/emilkirkegaard.dk\/en\/wp-json\/wp\/v2\/categories?post=3497"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/emilkirkegaard.dk\/en\/wp-json\/wp\/v2\/tags?post=3497"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}