David Klahr (born 1939) is an American psychologist whose research ranges across the fields of cognitive development, psychology of science, and educational psychology and has been a professor at Carnegie Mellon University since 1969. He is the Professor of Cognitive Development and Education Sciences at Carnegie Mellon University and a member of the National Academy of Education, a Fellow of the American Psychological Association, a Charter Fellow of the Association for Psychological Science, on the Governing Board of the , a member of the Society for Research in Child Development, and the Cognitive Science Society. He was an associate editor of Developmental Psychology and has served on the editorial boards of several cognitive science journals, as well as on the National Science Founda