Short-forms of the UK WAIS-R: regression equations and their predictive validity in a general population sample.
A sample of 200 healthy subjects, representative of the adult UK population in terms of age, sex and social class distribution, were administered a full-length WAIS-R (UK). Regression equations were built to predict full-length IQ from a series of short-forms. The short-forms ranged from a two-subtest version proposed by Silverstein (1982) to a seven-subtest version proposed by Warrington, James & Maciejewski (1986). Regression equations, their standard errors of estimate and confidence intervals are presented as well as IQ conversion tables. The short-forms are evaluated in terms of their validity in predicting full-length IQ and in terms of their clinical utility. The advantages of regression-based estimates of full-length IQ over those derived from conventional prorating are discussed.
Crawford
J R
JR
Department of Psychology, University of Aberdeen, Kings College, Scotland.
Allan
K M
KM
Jack
A M
AM
D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D003431:Cross-Cultural Comparison; D004739:England; D005260:Female; D006801:Humans; D007360:Intelligence; D008297:Male; D008875:Middle Aged; D011594:Psychometrics; D012016:Reference Values; D015203:Reproducibility of Results; D014888:Wechsler Scales / Q000706:statistics & numerical data*