Premorbid Indices of Intelligence: A review.

Accurately estimating premorbid levels of functioning is essential for the completion of adequate clinical neuropsychological evaluation. There have been a number of methods suggested for the completion of this task: use of Wechsler's "hold–don't hold" ratios, variations of this use of the WAIS or the Wechsler-Bellevue Intelligence Scales, use of performance on vocabulary and reading tasks, and the use of regression equations based on demographic variables to predict IQ. Results of such attempts and possible research directions are explored. Appropriate applications of the currently available methods for estimating premorbid functioning are suggested. (36 ref)