{"id":8178,"date":"2019-05-22T16:04:53","date_gmt":"2019-05-22T16:04:53","guid":{"rendered":"http:\/\/www.lancaster.ac.uk\/fas\/psych\/glossary\/hysteresis\/"},"modified":"2019-05-22T16:04:53","modified_gmt":"2019-05-22T16:04:53","slug":"hysteresis","status":"publish","type":"post","link":"https:\/\/www.lancaster.ac.uk\/fas\/psych\/glossary\/hysteresis\/","title":{"rendered":"Hysteresis"},"content":{"rendered":"<p>Termed jump resonance by electrical engineers, it involves scaling up the value of some parameter in a non-linear system to a critical value at which point there can be a sudden jump to a new and qualitatively different state, without any intermediary states. &nbsp;Scaling down or decreasing the value of the parameter may result in an abrupt change back to the original state, but at a different critical value (see figure below). &nbsp;Repeatedly scaling up and down can result in a hysteresis cycle (i.e., &#8216;progression&#8217; followed by &#8216;regression&#8217; and so on). &nbsp;Subsequently, the cycle is broken and the system settles into stable regime as defined by the new state. &nbsp;Many control systems have a built-in hysteresis cycle (e.g., thermostat). &nbsp;There is some evidence that hysteresis is a feature of the development of conservation and some indication that it is takes place in the development of grasping (i.e., between the scissor grasp and pincer grasp). &nbsp;All told, hysteresis, which takes place when a system is undergoing a transition, is one demonstration that qualitative and quantitative change are not mutually exclusive, but rather that one (quantitative change) can give rise to the other (qualitative change).&nbsp;<\/p>\n<p class=\"\" style=\"text-align: center;\">\n<p><img decoding=\"async\" src=\"..\/wp-content\/uploads\/2019\/05\/image064.hysteresisjpg.jpg\" \/><\/div>\n<\/div>\n<p class=\"\" style=\"text-align: center;\">An illustration of an abstract hysteresis curve or cycle: X could indicate the application of some force, while Y gives the magnitude of the changing effect. Thus, the force applied increases as it is scaled up and crosses the X line at some particular value. When it is scaled down, it does so at a different value. &nbsp;<\/p>\n<p class=\"\" style=\"text-align: left;\">See Attractor, Catastrophe theory, Control parameter, Dynamical systems approaches,&nbsp;Phase transition (or shift),&nbsp;Pincer grasp (or grip),&nbsp;Quantitative and qualitative change, Transition&nbsp;<\/p>\n<p><\/body><\/html><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Termed jump resonance by electrical engineers, it involves scaling up the value of some parameter in a non-linear system to a critical value at which point there can be a sudden jump to a new and qualitatively different state, without any intermediary states. &nbsp;Scaling down or decreasing the value of the parameter may result in &hellip; <\/p>\n<p class=\"link-more\"><a href=\"https:\/\/www.lancaster.ac.uk\/fas\/psych\/glossary\/hysteresis\/\" class=\"more-link\">Continue reading<span class=\"screen-reader-text\"> &#8220;Hysteresis&#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-8178","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\/8178","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=8178"}],"version-history":[{"count":0,"href":"https:\/\/www.lancaster.ac.uk\/fas\/psych\/glossary\/wp-json\/wp\/v2\/posts\/8178\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.lancaster.ac.uk\/fas\/psych\/glossary\/wp-json\/wp\/v2\/media?parent=8178"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.lancaster.ac.uk\/fas\/psych\/glossary\/wp-json\/wp\/v2\/categories?post=8178"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.lancaster.ac.uk\/fas\/psych\/glossary\/wp-json\/wp\/v2\/tags?post=8178"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}