Rasch models

Research output: Chapter in Book/Conference paperChapterpeer-review

9 Citations (Scopus)


The Rasch models arise from the a priori requirements that, from the responses of a class of persons to a class of items, the comparison between locations of persons should be independent of the relative locations of items, and vice versa. Arising from these requirements, a general model for responses in ordered categories, of which responses in two ordered categories are a special case, follows. Deviations of empirical responses from the model are then taken to violate these requirements of invariance. Ideally, these violations are corrected empirically rather than by using a more complicated model to account for the data.

Original languageEnglish
Title of host publicationInternational Encyclopedia of Education
Number of pages12
ISBN (Print)9780080448947
Publication statusPublished - 1 Dec 2010


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