Pat Langley is a research scientist at NASA Ames Research Center, where he carries out research on machine learning and intelligent agents. Before coming to NASA, Dr. Langley was an Associate Professor of Computer Science at the University of California, Irvine, and a Research Scientist at Carnegie Mellon University, where he received his PhD in cognitive psychology. Dr. Langley has published papers on a variety of topics including scientific discovery, concept formation, heuristics learning, motor learning, and language acquisition. He is co-author or editor of three other books. Dr. Langley serves as an editor of the journal Machine Learning and as director of the Institute for the Study of Learning and Expertise.