Difference between psychiatrist and psychology

Psychology is the study of cognition, motivation, emotion, perception, and behavior. Physiology is the study of the various biochemical and mechanical functions, structures and systems of the organism.

Psychology and physiology have many fields or sub-fields including, for example, comparative psychology which is the study of animal cognition and behavior, and animal physiology which is the study of all the forms of life. At the intersection between psychology and physiology, we find the field of psychophysiology which is the study of the physiological bases of cognition and behavior.

Psychology, physiology, and psychophysiology can be academic or applied; that is, we can obtain both abstract and practical psychological and physiological knowledge.