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MacLean, Hannah; McKenzie, Karen; Kidd, Gill; Murray, Aja L.; Schwannauer, Matthias – Research in Developmental Disabilities: A Multidisciplinary Journal, 2011
Intellectual assessment is central to the process of diagnosing an intellectual disability and the assessment process needs to be valid and reliable. One fundamental aspect of validity is that of measurement invariance, i.e. that the assessment measures the same thing in different populations. There are reasons to believe that measurement…
Descriptors: Mental Retardation, Factor Analysis, Goodness of Fit, Evaluation Methods