Alan S. Kaufman is Clinical Professor of Psychology at Yale University Child Study Center. He worked closely with David Wechsler in developing the WISC-R and is co-author of the KABC-II Normative Update, KTEA-3, and KBIT-2. The theory-based K-ABC and the KABC-II have been translated and adapted throughout the world,. He has published widely on the clinical and neuropsychological assessment of intelligence and achievement as well as the educational applications of test profiles. He wrote the 1979 landmark Intelligent Testing with the WISC-R and, more recently, co-authored Essentials of WAIS-IV Assessment—2nd ed. (2013) and Intelligent Testing with the WISC-V (2016).