Computation of Wechsler Adult Intelligence Scale-Revised Factor Scores: Equal and Differential Weights

Standard procedures for estimating factor scores for the Wechsler Adult Intelligence Scale-Revised (WAIS-R; D. Wechsler, 1981 ) involve equally weighted sums of the subtests that load most highly on the factor being estimated. We argue that factor scores derived in this manner lack discriminant vali...

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Bibliographic Details
Published in:Psychological assessment 1995-12, Vol.7 (4), p.456-462
Main Authors: Parker, Kevin C. H, Atkinson, Leslie
Format: Article
Language:English
Subjects:
Biological and medical sciences
Cognition. Intelligence
Computation
Discriminant Validity
Estimation (Mathematics)
Factor Structure
Fundamental and applied biological sciences. Psychology
Human
Intelligence
Intelligence Tests
Psychology
Psychology. Psychoanalysis. Psychiatry
Psychology. Psychophysiology
Psychometrics
Regression (Statistics)
Sample Size
Scores
Standardization
Statistical Weighting
Wechsler Adult Intelligence Scale
Wechsler Adult Intelligence Scale (Revised)
Weighting (Statistical)
Citations: Items that cite this one
Online Access:Get full text
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Summary:Standard procedures for estimating factor scores for the Wechsler Adult Intelligence Scale-Revised (WAIS-R; D. Wechsler, 1981 ) involve equally weighted sums of the subtests that load most highly on the factor being estimated. We argue that factor scores derived in this manner lack discriminant validity; they are strongly biased toward g (the first unrotated factor) and away from the other 2 unrotated factors. If regression-like weights are applied to all of the WAIS-R subtests and the products are summed, the resulting differentially weighted factors give results that show similar convergent validity and much greater discriminant validity with respect to the original factors.
ISSN:1040-3590
1939-134X
DOI:10.1037/1040-3590.7.4.456