Wechsler Adult Intelligence Scale—Revised subtest scatter as a function of maximum subtest scaled score.

The Wechsler Adult Intelligence Scale-Revised (Wechsler, 1981) standardization data were analyzed to determine the frequency of relative intersubtest scatter. The relative scatter range was defined as the difference between the highest and lowest subtest scores based on the value of the highest subtest. This approach provides the greatest precision in scatter analysis to determine whether the amount of scatter obtained in clinical profiles is rare enough to be considered abnormal. For ease of clinical use, tables are provided that report frequency of a minimum (lowest) subtest score by each level of maximum (highest) subtest score. Potential scatter range, rather than overall level of intelligence, was the primary determinant of the magnitude of scatter; the greater the possible range the larger the magnitude of scatter