1. Albert R. Cavalier, PhD, is an associate professor in the Department of Educational Studies and director of the Center for Assistive and Instructional Technology at the University of Delaware. His research interests are in human-factors principles involved in the use of assistive technology, and the cognitive demands placed on students with disabilities by functional tasks and assistive devices. Address: Albert R. Cavalier, Department of Educational Studies, University of Delaware, Newark, DE 19716.
2. Ralph P. Ferretti, PhD, is an associate professor in the Departments of Educational Studies and Psychology at the University of Delaware. His research interests focus on cognitive mechanisms that affect the use of assistive technology for persons with learning handicaps.