This fully updated, comprehensive text examines the assessment of intellectual abilities in children and adults. Chapters emphasize the rationale and techniques for measuring intellectual function in educational, clinical, and other organizational settings. The author includes detailed descriptions of the most widely used procedures for administering, scoring, and interpreting individual and group intelligence tests. This second edition features additional material on testing the handicapped, individual and group differences in mental abilities, theories and issues in the assessment of mental abilities, and new tests for measuring intelligence and related abilities.