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Callinan, Sarah; Cunningham, Everarda; Theiler, Stephen – Australian Journal of Learning Difficulties, 2014
Many tests used in educational settings to identify learning difficulties endeavour to pick up only the lowest performers. Yet these tests are generally developed within a Classical Test Theory (CTT) paradigm that assumes that data do not have significant skew. Rasch analysis is more tolerant of skew and was used to validate two newly developed…
Descriptors: Foreign Countries, Reading Tests, Item Response Theory, Elementary School Students