v. 1. Language / edited by Lila R. Gleitman and Mark Liberman -- v. 2. Visual cognition / edited by Stephen M. Kosslyn and Daniel N. Osherson -- v. 3. Thinking / edited by Edward E. Smith and Daniel N. Osherson -- v. 4. Methods, models, and conceptual issues / edited by Don Scarborough and Saul Sternberg.