| His work has focused on social-psychological aspects of aging, including the role of control as a construct for characterizing life-course development, adult age-related changes in the experience, perception, and expression of affect, and the impact of disabling late life disease on patients and their families. This body of work is reflected in publications, which have appeared in major medical, psychology, and aging journals. He is also author of numerous books and has served as editor of the Journal of Gerontology: Psychological Sciences.
Much of his recent work has focused on issues of family caregiving.
He is currently principal investigator of a 10-year, NIMH funded longitudinal
multi-site study investigating the health effects of caregiving among
married couples. He also serves as principal investigator of the coordinating
center for the NIA funded multi-site dementia caregiving intervention
trial, REACH (Resources for Enhancing Alzheimer's Caregiver Health).
In recognition of his contributions to research on aging, he was the
year 2000 recipient of the Kleemeier Award from the Gerontological Society of America.