He is a Diplomate in Clinical Neuropsychology with the American Board of Professional Psychology. In 1990 he received the International Neuropsychological Society's Philip M. Rennick Award for Excellence in Research. His clinical interests include neuropsychological rehabilitation for patients with cognitive, behavioral, and emotional problems caused by brain dysfunction and the evaluation and management of Alzheimer's Disease and other dementias. His research interests include cognitive neuroscience, aphasia, and human frontal lobe dysfunction. He is the author of over 20 scholarly and professional publications, including refereed journal articles, and book chapters. He has also written general-interest articles on the brain and aging for the University of Iowa Health Care System's website.