Leon A. Pastalan, PhD, is Professor of Architecture in the College of Architecture and urban Planning at the University of Michigan. Dr. Pastalan is also Director of the National Center on Housing and Living Arrangements for Older Americans. As a researcher of long standing in the field of environments for the elderly, he is an expert in sensory deficits, spatial behavior, and housing. Dr. Pastalan has published many books and articles resulting from his work, including Man Environment Reference 2 (MER 2), (The University of Michigan Press, 1983), Retirement Communities: An American Original (The Haworth Press, 1984), and most recently, Lifestyles and Housing of Older Adults: The Florida Experience (The Haworth Press, 1989). Dr. Pastalan is also the editor of the Journal of Housing for the Elderly (The Haworth Press).