Received Nov. 5, 2001; revision received March 19, 2002; accepted March 21, 2002. From the Neuropsychology Research Program, Functional Imaging Research Program, Mental Health Intervention Research Center for Late-Life Mood Disorders, and the Departments of Psychiatry, Radiology, Neurology, and Psychology, University of Pittsburgh Medical Center. Address reprint requests to Dr. Bell-McGinty, Neuropsychology Research Program, Suite 830, Oxford Bldg., 3501 Forbes Ave., Pittsburgh, PA 15213. Supported in part by NIMH grants MH-52247 (Mental Health Intervention Research Center for the Study of Late-Life Mood Disorders, Dr. Reynolds, Director), MH-43832, MH-37869, MH-01210, MH-59945, MH-01684 (Career Development Award, Dr. Butters), MH-19986 (Dr. Bell-McGinty), and MH-01077 (Research Scientist Development Award, Dr. Becker); by National Institute on Aging grant AG-05133 (University of Pittsburgh’s Alzheimer Disease Research Center, S.T. DeKosky, Director); and by National Heart, Lung, and Blood Institute grant HL-57529 (Cognitive and Cerebrovascular Consequences of Hypertension, J.R. Jennings, principal investigator). The authors thank M. Zmuda and S. Bensasi for their assistance with data management.