Estimating WAIS-R IQ from the Shipley Institute of Living Scale: a replication.
Zachary, Crumpton, and Spiegel (1985) introduced a linear regression and continuous norming procedure for estimating Full Scale WAIS-R IQ from the Shipley Institute of Living Scale. The present study replicated their method with 55 adult psychiatric inpatients and day hospital patients. A high correlation (r = .85), an extremely small mean difference in IQ (.8 points), and an acceptable average absolute difference (7.6 points) were found between estimated and obtained WAIS-R. Sines and Simmons tables (1959) for Shipley estimates of WAIS IQ produced a high correlation (r = .86), but large mean and average absolute differences (13.1 and 13.6 points, respectively). The study supports use of the Zachary et al. procedure for estimating WAIS-R IQ from Shipley scores in a psychiatric population.
Massachusetts Mental Health Center, Boston 02115.
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JL
Weiss
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Schell
D000293:Adolescent; D000328:Adult; D000368:Aged; D001925:Brain Damage, Chronic / Q000175:diagnosis* / Q000523:psychology; D005260:Female; D006801:Humans; D007360:Intelligence; D008297:Male; D008875:Middle Aged; D009483:Neuropsychological Tests / Q000706:statistics & numerical data*; D011594:Psychometrics; D015203:Reproducibility of Results; D014888:Wechsler Scales / Q000706:statistics & numerical data*