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Direct linkMacLean, 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
Peer reviewedArbit, Jack; Zagar, Robert – Journal of Psychology, 1979
Reveals a two-factor structure (general retentiveness and memory) in the Wechsler Memory Scale for total male and female samples and for both males and females aged 13 to 39 years and 40 to 59 years but not for males or females aged 60 to 88 years. (Author/RL)
Descriptors: Age Differences, Age Groups, Cognitive Development, Developmental Stages
