लेखक: Diane L. Coalson

SUSAN ENGI RAIFORD, Ph D, and DIANE L. COALSON, Ph D, are the research directors for the WPPSI¯(TM)-IV, as well as numerous other Wechsler Intelligence Scales that have been published over the past decade. As research directors, they are responsible for conceptualizing, designing, and implementing all aspects of scale development, including writing the published manuals.