Jack Demick, was a Research Associate at Harvard University and a clinical and developmental psychologist. Before Harvard he has taught courses in Education and Human Development at Brown University and has held positions at Clark University where he collaborated for 27 years with one of Witkin's major research associates, Seymour Wapner, and at the University of Massachusetts Medical Center. He published numerous journal articles and book chapters, He co-edited eight major volumes, and was the editor of the Journal of Adult Development. His representative research interests include cognitive (e.g., cognitive style development) and social (e.g., adaptation of infants, children, and parents to adoption) development across the life span.