FIGURE 8.2 Four abilities tested by WISC-IV This figure shows examples of the types of items used on the WISC-IV to measure four aspects of children’s intelligence. On most subtests, the measure of performance is simply whether answers are correct, but on some, such as “perceptual speed,” the measure of performance is the number of correct answers that are generated in a limited time. These are not actual items from the test but rather are of the same type; copyright laws prevent the reproduction of the actual items.