Scott M. Hofer is Professor of Human Development and Family Sciences and Director, Psychosocial Core, Center for Healthy Aging Research at the Oregon State University. He received his Ph.D. in Psychology from University of Southern California in 1994 and held postdoctoral positions at the University of Manchester and the Center for Developmental and Health Genetics at the Pennsylvania State University. His research examines the role of aging and health on changes in cognitive functioning, in interaction with demographic and psychosocial influences, and on statistical analysis and design issues...