Decision Processes in Visual Perception explores the relationships between the organization of a complex visual pattern by the perception system and the molecular activity involved in the discrimination of differences in magnitude or intensity between two stimulus elements. The text discusses the basic principles of discrimination, identification, and self-regulation of the perception system; demonstrates how adaptive decision modules emerge from multiple constraints; shows how combinations of simple decisions lead to complex judgmental tasks; and synthesizes traditional approaches to perception in order to clarify the crucial and pervasive role of these modules in the overall activity of perceptual organization. Psychologists, neuroscientists, molecular biologists, and physiologists will find the book invaluable.