Psychology (Classical Greek: psyche = "soul" or "mind", logos =
"study of") is an academic and applied field involving the study
of behavior and its relationship to the mind and brain.
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. It
is largely concerned with humans, although the behavior and
mental processes of animals is also be part of psychological
research, either as a subject in its own right (e.g. animal
cognition and ethology), or as a way of gaining an insight into
human psychology by means of comparison (including comparative
psychology). Psychology is commonly defined as the science of
behavior and mental processes. Although its name derives from
the Greek word "psyche", psychology does not scientifically
study the soul. Psychology differs from sociology, anthropology,
economics, and political science, in part, because it involves
studying the behaviour of individu