Written clearly and concisely, Paul Kline's latest book provides a modern, readable introduction to the psychometry of intelligence. He explains factor analysis and the construction of intelligence tests and shows how the resulting factors provide a picture of human abilities. He also demonstrates the value of such tests in both applied and theoretical psychology, and in so doing answers the critics of intelligence testing. It is one of the few modern texts that deals with the factorial view yet includes modern work in the cognitive field.