{"id":8779,"date":"2019-05-22T16:11:25","date_gmt":"2019-05-22T16:11:25","guid":{"rendered":"http:\/\/www.lancaster.ac.uk\/fas\/psych\/glossary\/point-light_display\/"},"modified":"2019-05-22T16:11:25","modified_gmt":"2019-05-22T16:11:25","slug":"point-light_display","status":"publish","type":"post","link":"https:\/\/www.lancaster.ac.uk\/fas\/psych\/glossary\/point-light_display\/","title":{"rendered":"Point-light display"},"content":{"rendered":"<p>introduced by&nbsp;<a href=\"http:\/\/people.psych.cornell.edu\/~jec7\/pubs\/JOMO.PDF\" data-editable-link=\"http:\/\/people.psych.cornell.edu\/~jec7\/pubs\/JOMO.PDF?target=_self\" target=\"_self\" rel=\"noopener noreferrer\">Gunnar Johansson<\/a>&nbsp;(1911-1998) in 1973, it typically consists of small light sources or reflective markers attached to the main joints of the body, especially, the elbows, wrists, hips, knees and ankles. &nbsp;As the person moves in a darkened environment dressed completely in black, an almost immediate impression is created of a coherent and recognisable movement pattern that might be perceived to be sex-related or that of familiar person. &nbsp;Another example is when a person performing under such conditions demonstrates lifting a weighted object, it results in the observer judging the actual weight with an accuracy of 3-4 kg. &nbsp;This leads to the intriguing question, still not completely answered, as to how dynamics (i.e., forces required to lift a particular weight) are derived from kinematics in such displays. &nbsp;Infants as young as 3-5 months of age show some evidence of being able to detect biological motion from point-light displays, and even changes in phase relations between the component parts when they have been perturbed.&nbsp;<\/p>\n<p>See <a href=\"biological_motion\">Biological motion<\/a>, <a href=\"kinetic_depth_information\">Kinetic depth information<\/a>, <a href=\"motion_perception\">Motion perception<\/a>, <a href=\"perception\">Perception<\/a><\/p>\n<p><\/body><\/html><\/p>\n","protected":false},"excerpt":{"rendered":"<p>introduced by&nbsp;Gunnar Johansson&nbsp;(1911-1998) in 1973, it typically consists of small light sources or reflective markers attached to the main joints of the body, especially, the elbows, wrists, hips, knees and ankles. &nbsp;As the person moves in a darkened environment dressed completely in black, an almost immediate impression is created of a coherent and recognisable movement &hellip; <\/p>\n<p class=\"link-more\"><a href=\"https:\/\/www.lancaster.ac.uk\/fas\/psych\/glossary\/point-light_display\/\" class=\"more-link\">Continue reading<span class=\"screen-reader-text\"> &#8220;Point-light display&#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-8779","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\/8779","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=8779"}],"version-history":[{"count":0,"href":"https:\/\/www.lancaster.ac.uk\/fas\/psych\/glossary\/wp-json\/wp\/v2\/posts\/8779\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.lancaster.ac.uk\/fas\/psych\/glossary\/wp-json\/wp\/v2\/media?parent=8779"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.lancaster.ac.uk\/fas\/psych\/glossary\/wp-json\/wp\/v2\/categories?post=8779"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.lancaster.ac.uk\/fas\/psych\/glossary\/wp-json\/wp\/v2\/tags?post=8779"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}