Larry Fenson, Ph.D., is Professor of Psychology at San Diego State University in California. Dr. Fenson has published research on infant attentiveness, early symbolic development, categorization, children's drawing skills, play, and early language development. He received his doctorate in child psychology from the University of Iowa. He served as Assistant Professor at the University of Denver and was a National Institute of Child Health and Human Development postdoctoral fellow with Jerome Kagan at Harvard University. Dr. Fenson is Chair of The CDI Advisory Board.