{"id":7521,"date":"2019-05-22T15:57:46","date_gmt":"2019-05-22T15:57:46","guid":{"rendered":"http:\/\/www.lancaster.ac.uk\/fas\/psych\/glossary\/co-twin_method\/"},"modified":"2019-05-22T15:57:46","modified_gmt":"2019-05-22T15:57:46","slug":"co-twin_method","status":"publish","type":"post","link":"https:\/\/www.lancaster.ac.uk\/fas\/psych\/glossary\/co-twin_method\/","title":{"rendered":"Co-twin method"},"content":{"rendered":"<p>A method for comparing the development of monozygotic twins in which one is given regular practice or training on a specific ability or a range of them, while such experiences are withheld from the other twin. &nbsp;If practice does not make a difference, then it taken as evidence that the environment plays little role in development and thus it is genetically determined. &nbsp;In its original form, as employed by <a href=\"http:\/\/www.cambridge.org\/aus\/catalogue\/catalogue.asp?isbn=9780521651172\" target=\"_self\" data-editable-link=\"http:\/\/www.cambridge.org\/aus\/catalogue\/catalogue.asp?isbn=9780521651172?target=_self\" rel=\"noopener noreferrer\">Arnold Gesell and Myrtle B. McGraw<\/a> before WWII, this method would not now meet with ethical approval, but it finds an echo in behavior genetics when attempting to dissect hereditary and environmental contributions to the development of a range of traits by means of comparing monozygotic and dizygotic twins using a range of sophisticated statistical techniques.<\/p>\n<p>See <a href=\"behavior_genetics\">Behavior genetics<\/a>, <a href=\"dizygotic_twins\">Dizygotic twins<\/a>, <a href=\"hereditary\">Hereditary<\/a>, Monozygotic twins<\/p>\n<p><\/body><\/html><\/p>\n","protected":false},"excerpt":{"rendered":"<p>A method for comparing the development of monozygotic twins in which one is given regular practice or training on a specific ability or a range of them, while such experiences are withheld from the other twin. &nbsp;If practice does not make a difference, then it taken as evidence that the environment plays little role in &hellip; <\/p>\n<p class=\"link-more\"><a href=\"https:\/\/www.lancaster.ac.uk\/fas\/psych\/glossary\/co-twin_method\/\" class=\"more-link\">Continue reading<span class=\"screen-reader-text\"> &#8220;Co-twin method&#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-7521","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\/7521","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=7521"}],"version-history":[{"count":0,"href":"https:\/\/www.lancaster.ac.uk\/fas\/psych\/glossary\/wp-json\/wp\/v2\/posts\/7521\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.lancaster.ac.uk\/fas\/psych\/glossary\/wp-json\/wp\/v2\/media?parent=7521"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.lancaster.ac.uk\/fas\/psych\/glossary\/wp-json\/wp\/v2\/categories?post=7521"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.lancaster.ac.uk\/fas\/psych\/glossary\/wp-json\/wp\/v2\/tags?post=7521"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}