John R. Anderson is the R. K. Mellon University Professor of Psychology and Computer Science at Carnegie Mellon University. He has led the development of the ACT-R cognitive architecture and its applications, especially intelligent tutoring systems. Anderson has been recognized as a leader in the field of cognitive science by a number of awards, including the American Psychological Association's Distinguished Scientific Career Award, the David E. Rumelhart Prize for Contributions to the Formal Analysis of Human Cognition, the Howard Crosby Warren Medal for outstanding achievement in Expe...