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The area of experimental psychology concerned specifically with how biology shapes behavior and mental processes.

The area of experimental known as physiological psychology has evolved in the 1990s. Increasingly, the field is being referred to as behavioral neuroscience, replacing physiological psychology and biological psychology. Nonetheless, the goals of psychologists in this field remain the same: to utilize basic research to explain behavior in physiological terms, working on the assumption that for every behavioral event there is a corresponding physical event or series of events.

The physiological psychologist (or behavioral neuroscientist) is also concerned with the functioning of the adrenal glands and with the physical processes involved in sensation. Although physiological psychology is concerned with physical organisms, it is distinguished from such life sciences as physiology and...