For many years behaviorism was criticized because it rejected the study of perception. This rejection was based on the extreme view that percepts were internal subjective experiences and thus not subject to examination. This book argues that this logic is incorrect and shows how visual perception, particularized in the study of form recognition, can be carried out from the behavioral point of view if certain constraints and limitations are understood and accepted. The book discusses the idea of representation of forms, considers the major historical neural, psychological, and computational theories of form recognition, and then concludes by presenting a modern approach to the problem. In this book, William Uttal continues his critical analysis of the foundations of modern psychology. He is particularly concerned with the logical and conceptual foundations of visual perception and uses form recognition as a vehicle to rationalize the discrepancies between classic behaviorism and what we now appreciate are legitimate research areas.