SAM GOLDSTEIN, PhD, is a member of the faculty at the University of Utah; maintains a private practice at the Neurology, Learning, and Behavioral Center in Salt Lake City, Utah; and is on staff at the University Neuropsychiatric Institute. He is the Editor in Chief of the Journal of Attention Disorders.

JACK A. NAGLIERI, PhD, is Professor of Psychology at George Mason University. Dr. Naglieri authored Essentials of CAS Assessment and coauthored Essentials of WNV Assessment (both published by Wiley). He is the Senior Editor of the Journal of Attention Disorders.

Jointly Drs. Goldstein and Naglieri are developing six new assessment instruments and are coeditors of the Encyclopedia of Child Behavior and Development.

MELISSA DeVRIES, PhD, is conducting postdoctoral study at the Neurology, Learning, and Behavior Center in Salt Lake City, Utah. In addition to this text, she has coauthored three book chapters and a peer-reviewed article.