Russell Church is an experimental psychologist who studies learning, memory, and decision processes of animals. He has been a member of the Brown faculty since 1955 where his early research concerned studies of social learning and punishment. During the last 25 years he has concentrated on the ability of animals (rats and humans) to discriminate time intervals, and adjust their behavior to the temporal constraints of tasks. His research, which involves behavioral, neuroscience, and mathematical approaches, has been published primarily in scientific journals. Since 1957 his research has been supported continuously by grants from the National Institute of Mental Health and the National Science Foundation. He has served as President of the Eastern Psychological Association, the Society for Computers in Psychology, and two Divisions of the American Psychological Association. He is currently teaching courses to graduate and undergraduate students in experimental analysis of behavior and mathematical models of psychological processes.