ELIZABETH O. LICHTENBERGER, PHD, is a licensed clinical psychologist residing in Carlsbad, California. She has coauthored several Essentials books, including Essentials of Assessment Report Writing (with Nancy Mather, Nadeen Kaufman, and Alan Kaufman). She and Alan Kaufman are coauthors of Assessing Adolescent and Adult Intelligence, now in its third edition. ALAN S. KAUFMAN, PHD, a leading expert on intelligence testing, is Clinical Professor of Psychology at the Child Study Center at the Yale University School of Medicine. His books, tests, and intelligent testing approach have had worldwide impact on clinical assessment. Dr. Kaufman's approach to test interpretation and his tests--such as KABC-II and KTEA-II, which he co-created with Nadeen Kaufman--reflect an integration of psychometric, theoretical, and clinical perspectives. Alan and Nadeen are the Series Editors of Wiley's Essentials of Psychological Assessment series.