Journal article

Age-related invariance of abilities measured with the Wechsler Adult Intelligence Scale-III

Stephen C Bowden, Lawrence G Weiss, James A Holdnack, Delyth Lloyd

PSYCHOLOGICAL ASSESSMENT | AMER PSYCHOLOGICAL ASSOC | Published : 2006

Abstract

Examination of measurement invariance tests the assumption that the model underlying a set of test scores is directly comparable across groups. The observation of measurement invariance provides fundamental evidence for the inference that scores on a test afford equivalent measurement of the same psychological traits among diverse groups. Groups may be derived from different psychosocial backgrounds or different clinical presentations. In the Wechsler Adult Intelligence Scale-III (WAIS-III)/Wechsler Memory Scale-III (WMS-III) Technical Manual (Psychological Corporation, 2002), there appears to be a breakdown in factor structure among the standardization cases in older adults. In this study, ..

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