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Abstract
A short form (Information, Arithmetic, Picture Completion, and Block Design) of the Wechsler Adult Intelligence Scale-Revised (WAIS-R) developed by Reynolds, Willson, and Clark (1983) was used to estimate Full Scale IQ in brain-injured persons. Estimated IQ correlated .91 with WAIS-R Full Scale IQ, but overestimated IQ by a mean of 5.94 points. The pattern of overestimating IQ with brain-injured persons (p < .001) suggests that the Reynolds et al. short-form (RWCSF) procedure is not appropriate for brain-injured patients and raises questions about its use with other individuals who have cognitive or neurological impairments.