STEPHEN GREENSPAN is a developmental psychologist, Clinical Professor of Psychiatry at the University of Colorado, and Professor Emeritus of Educational Psychology at the University of Connecticut. In 2008, he received the Dybwad Award for Humanitarianism from the American Association for Intellectual and Developmental Disabilities. A specialist in developmental disablities with a particular interest in social competence and incompetence, Greenspan's interest in gullibility grew out of his advocacy for the innocence of a cognitively-impaired man wrongly convicted of murder.