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Estimating WAIS‐R IQ from the shipley institute of living scale: A replication
Author(s) -
Weiss Justin L.,
Schell Ruth E.
Publication year - 1991
Publication title -
journal of clinical psychology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.124
H-Index - 119
eISSN - 1097-4679
pISSN - 0021-9762
DOI - 10.1002/1097-4679(199107)47:4<558::aid-jclp2270470414>3.0.co;2-w
Subject(s) - wechsler adult intelligence scale , psychology , replication (statistics) , intelligence quotient , short forms , population , correlation , statistics , scale (ratio) , linear regression , audiology , clinical psychology , psychiatry , demography , mathematics , cartography , medicine , cognition , geometry , sociology , geography
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.