{"id":1214,"date":"2015-12-15T20:32:26","date_gmt":"2015-12-15T19:32:26","guid":{"rendered":"http:\/\/stg-blogs.bmj.com\/adc\/?p=1214"},"modified":"2015-12-16T22:33:10","modified_gmt":"2015-12-16T21:33:10","slug":"statsminiblog-rasch-analysis","status":"publish","type":"post","link":"https:\/\/stg-blogs.bmj.com\/adc\/2015\/12\/15\/statsminiblog-rasch-analysis\/","title":{"rendered":"StatsMiniBlog: Rasch Analysis"},"content":{"rendered":"

\"calculator-97842_640\"<\/a> Yes.<\/p>\n

You’re right. I have spelt ‘rash’ wrongly and yes, there are many very very bad puns which can come from this title.<\/p>\n

But you may have seen, occasionally, Rasch analysis as a thing on scientific paper\u00a0and wondered ‘Why have they spelled rash wrong?’<\/p>\n

Rasch analysis is a way of creating a properly\u00a0scaled measurement from an interval scale (as in Likert scales).<\/p>\n

The scale may look like:<\/p>\n\n\n<\/colgroup>\n\n\n\n
Happy<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/td>\nSad<\/td>\n<\/tr>\n
1<\/td>\n2<\/td>\n3<\/td>\n4<\/td>\n5<\/td>\n6<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

But when people fill it in, the difference between 1 & 2 is different than 3&4 (that is, it’s more different to a person to be say ‘I’m feeling 4 not 3’ – the sad side of half-way – than to say ‘I’m feeling 2 not 1’ but still in the happy zone).<\/p>\n

The Rasch analysis mathematically corrects the distances between the numbers, like making the ruler rubbery.<\/p>\n\n\n<\/colgroup>\n\n\n\n
Happy<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/td>\nSad<\/td>\n<\/tr>\n
1<\/td>\n2<\/td>\n3<\/td>\n4<\/td>\n5<\/td>\n6<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

– Archi<\/p>\n

 <\/p>\n","protected":false},"excerpt":{"rendered":"

Yes. You’re right. I have spelt ‘rash’ wrongly and yes, there are many very very bad puns which can come from this title. But you may have seen, occasionally, Rasch analysis as a thing on scientific paper\u00a0and wondered ‘Why have they spelled rash wrong?’ Rasch analysis is a way of creating a properly\u00a0scaled measurement from […]<\/p>\n

Read More…<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[2676],"tags":[],"class_list":["post-1214","post","type-post","status-publish","format-standard","hentry","category-stats"],"jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/stg-blogs.bmj.com\/adc\/wp-json\/wp\/v2\/posts\/1214","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/stg-blogs.bmj.com\/adc\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/stg-blogs.bmj.com\/adc\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/stg-blogs.bmj.com\/adc\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/stg-blogs.bmj.com\/adc\/wp-json\/wp\/v2\/comments?post=1214"}],"version-history":[{"count":0,"href":"https:\/\/stg-blogs.bmj.com\/adc\/wp-json\/wp\/v2\/posts\/1214\/revisions"}],"wp:attachment":[{"href":"https:\/\/stg-blogs.bmj.com\/adc\/wp-json\/wp\/v2\/media?parent=1214"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/stg-blogs.bmj.com\/adc\/wp-json\/wp\/v2\/categories?post=1214"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/stg-blogs.bmj.com\/adc\/wp-json\/wp\/v2\/tags?post=1214"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}