An experimental psychologist formulates hypotheses and experimental designs, and conducts experiments, to investigate problems of perception, memory, learning, personality, and cognitive processes. Designs and constructs equipment and apparatus for lab study. Manages variables in experiments with humans or animals, and studies behavior in relation to variables. Collaborates with other scientists in such fields as physiology, biology, and sociology in conducting interdisciplinary studies of behavior and formulating theories of behavior. Writes papers for publication or for presentation at scientific meetings. May specialize in aesthetics, memory, learning, autonomic functions, feeling and emotion, motivation, motor skills, perception and high order cognitive processes. May conduct experiments to study relationship of behavior to various bodily mechanisms and be designated Physiological Psychologist. May study animal behavior to develop theories on animal and human behavior and be designated Comparative Psychologist. To be an experimental psychologists usually requires a doctorate degree.