Dr. Gallagher, Senior Professor at Temple University, trained as an experimental psychologist at Loyola and Harvard Universities and lectures widely on Piagetian theory. She lives in Doylestown, Pa. E-mail Dr. Gallagher Purchase Dr. Gallagher's book, "The Learning Theory of Piaget & Inhelder," from Amazon.com More information on "The Learning Theory of Piaget & Inhelder"