Psychology is an academic and applied field involving the study of mind and behavior. "Psychology" also refers to the application of such knowledge to various spheres of human activity, including problems of individuals' daily lives and the treatment of mental illness.

Psychology differs from sociology, anthropology, economics, and political science in part because it involves studying the mental processes and behavior of individuals (alone or in groups) rather than the behavior of the groups or aggregates themselves. Psychology differs from biology and neuroscience in that it is primarily concerned with the interaction of mental processes and behavior and of the overall processes of a system, and not simply the biological or neural processes themselves.

Although psychological questions were asked in antiquity, psychology emerged as a separate discipline only recently. The first person to call himself a "psychologist", Wilhelm Wundt, opened the first psychological laboratory in 1879. - Wikipedia