The Stanford-Binet Intelligence Scale was designed to assess an individual's intelligence and cognitive abilities. It is appropriate for ages 2 and older.

The Wechsler Adult Intelligence Scale-Revised was designed to assess the intellectual ability of individuals age 16 and older. The W.A.I.S. consists of subtests that measure different facets of intelligence. The test results in three I.Q. scores: verbal, performance, and full scale including verbal comprehension, perceptual organization, working memory, and processing speed. The test can be completed in 60 to 90 minutes.

The Wechsler Intelligence Scale for Children-Revised was intended as a general intelligence test for children. It is appropriate for children between the ages of 6 and 16 and takes 50 to 75 minutes to complete. Results of the test represent the individual's functioning in verbal comprehension, perceptual reasoning, working memory, and processing speed. There is also a score representing the child's general intelligence ability.