Margie Lachman, PhD, is the Minnie and Harold Fierman Professor of Psychology at Brandeis University, where she directs the Lifespan Lab. She earned her AB from Boston University and her MS and PhD from The Pennsylvania State University. A leading expert on adult development and aging, Lachman is one of a small group of scholars who study midlife from a lifespan developmental perspective. Her honors include research awards from the American Psychological Association (APA) and the Gerontological Society of America. She has authored numerous scholarly articles and coedited key volumes, including Multiple Paths of Midlife Development, Handbook of Midlife Development, and the APA Handbook of Adult Development and Aging. Lachman was a member of the John D. and Catherine T. MacArthur Foundation Research Network on Successful Midlife Development, which launched the landmark Midlife in the United States (MIDUS) study. She is a coinvestigator on MIDUS and several other projects exploring cognition, health, and well-being in midlife and later adulthood. At Brandeis, she teaches courses on adult development and aging and lifespan psychology.