How is intelligence measured? The most widely used test is the Wechsler Adult Intelligence Scale (WAIS). This test makes an important distinction between verbal ability and nonverbal ability. There are separate tasks to measure each type of ability. Scores on these individual tasks are then combined to produce an overall IQ score.
As shown in this table, the WAIS contains 6 verbal subtests and 5 performance (nonverbal) subtests.
On the next screens you will try your hand at sample questions and tasks similar to the items on each of the 11 WAIS subtests.