1. J. P. Das, PhD, is the director of the Developmental Disabilities Centre and a professor of educational psychology at the University of Alberta. His research interests are in cognitive processes, learning disabilities, and mental retardation. His most recent publication is a book entitled Assessment of Cognitive Processes, coauthored with Dr. Jack A. Naglieri and Dr. John R. Kirby.
2. Rama K. Mishra received his PhD in educational psychology from the University of Alberta. He is currently a research associate with the Developmental Disabilities Centre, University of Alberta.
3. John R. Kirby received his PhD from the University of Alberta. He is presently professor of education at Queen's University, Kingston, Ontario. His research interests are in learning disabilities and cognitive processes. He has published widely in these areas, including a book with Noel Williams entitled Learning Problems, A Cognitive Approach. Address: Dr. J. P. Das, Developmental Disabilities Centre, 6-123D, Education North, University of Alberta, Edmonton, Alberta, Canada T6G 2G5.