The psychometry of intelligence is one of psychology's great achievements yet it is poorly understood. Paul Kline's latest book provides a modern, readable introduction to the subject. Written to be clear and concise it none the less provides a rigorous account of the psychometric view of intelligence. Paul Kline explains factor analysis and the construction of intelligence tests and shows how the resulting factors provide a picture of human abilities. He shows 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.