Craig Piers, Ph.D. is a psychotherapist and clinical supervisor in the health center at Williams College and former associate director of admissions and senior staff psychologist at the Austen Riggs Center. Dr. Piers is a contributing editor of Psychoanalytic Dialogues and also serves as a reviewer for several other professional journals. John P. Muller, Ph.D. is director of training at the Austen Riggs Center. Dr. Muller is the author of numerous books, including most recently Beyond the Psychoanalytic Dyad: Developmental Semiotics in Freud, Peirce, and Lacan (Routledge, 1996). Joseph Brent, Ph.D. is a historian of ideas. He is currently president of the Semiotic Society of America and of the Charles S. Peirce Society. Dr. Brent is the author of the only full-length biography of Peirce, of which he published a revised edition in 1993.