About the Authors

Robert Sekuler is the Louis and Frances Salvage Professor of Psychology at Brandeis University, Adjunct Professor of Cognitive & Neural Sciences at Boston University, and Consultant in Neurosurgery at Children's Hospital (Boston). At Brandeis, where he served as the university's chief academic officer, Sekuler is also a member of the Volen Center for Complex Systems, an interdisciplinary center for the study of the brain. After earning his Ph.D. at Brown University in 1964, he held a postdoctoral fellowship at the Massachusetts Institute of Technology. Subsequently, Sekuler was on the faculty at Northwestern University for twenty-four years, where he was John Evans Professor of Neuroscience, and held the rank of professor in the departments of psychology, ophthalmology, and neurobiology & physiology. After chairing Northwestern's department of psychology for six years, he served as Associate Dean in the College of Arts and Sciences. A leader in the fields of motion perception and age-related perceptual changes, Sekuler has published more than 200 scientific papers and has contributed chapters to various books including the Handbook of Perception, the APA Encyclopedia of Psychology, the Handbook of Sensory Physiology, the Handbook of Experimental Psychology, and the Oxford Textbook of Geriatric Medicine. He chaired the National Academy of Sciences' Committee on Vision, and directed the Academy's study of "Aging Workers and Visual Impairment" as well as a study of "Vision and Aging." Those efforts lead to his co-edited book, Aging and Visual Function. During 2000, Sekuler was a visiting scientist at the Rotman Research Institute of Toronto's Baycrest Centre for Geriatric Care, and a visiting professor of psychology at the University of Toronto. He has served on the board of the Hugh Knowles Center on Hearing and its Preservation, and on the Sensory Physiology of Advisory Panel of the National Science Foundation. Sekuler is an elected fellow of the American Psychological Society and the American Association for the Advancement of Science; he is a member of the Psychonomic Society, the Society for Neuroscience and the Association for Research in Vision and Ophthalmology.

Randolph Blake is Centennial Professor of Psychology at Vanderbilt University, Nashville, Tennessee; beginning in 1988 he chaired this department for eight years. Prior to this appointment he was on the faculty of Northwestern University for fourteen years. He received his Ph.D. from Vanderbilt in 1972 and then spent two years as a postdoctoral fellow in the Sensory Sciences Center at the University of Texas Graduate School of Biomedical Sciences. Blake has published extensively in major psychology and neuroscience journals and has contributed chapters to edited books including Models of the Visual Cortex, Frontiers of Visual Science, and Early Vision and Beyond. His research, supported by grants from the National Science Foundation and the National Institutes of Health, focuses on visual perception with particular emphasis on binocular vision, motion perception, and perceptual grouping. In recent years, Blake's research has expanded to include functional brain imaging of visual areas involved in perception of human activity. In recognition of his research contributions, Blake received a Career Development Award from the National Institutes of Health and the American Psychological Association's Early Career Award for Distinguished Scientific Contribution. Blake is an elected Fellow of the American Association for the Advancement of Science, the American Psychological Society and the John Kennedy Center for Research on Human Development. He is a past member of the Committee on Vision of the National Academy of Sciences/National Research Council and the Sensory Sciences Advisory Panel of the National Science Foundation. During 1992, he was a Fellow of the Japan Society for the Promotion of Science, and in 1995, he held the William Evans Professorship in Psychology at Dunedin University, New Zealand. His professional memberships include the Association of Research in Vision and Ophthalmology, Sigma Xi and the American Association for the Advancement of Science.