David Klahr is a professor and former head of the Department of Psychology at Carnegie Mellon University. His current research focuses on cognitive development, scientific reasoning, and cognitively-based instructional interventions in early science education. His earlier work addressed cognitive processes in such diverse areas as voting behavior, college admissions, consumer choice, peer review and problem solving. Dr. Klahr pioneered the application of information-processing analysis to questions of cognitive development, and formulated the first computational models to account for children's thinking processes. He received a Ph.D. in organizations and social behavior from Carnegie Mellon University.