Psychology: This is the study of human mind. On other words Psychology is the science of behavior or mental processes. Its immediate aim is to understand the individuals or groups by either establishing general principles or researching specific cases. In this field, the professional practitioner or researcher is known as a psychologist, and may be classified as a behavioral scientist, social scientist and cognitive scientist.

A psychologists try to understand the role of mental functions in particular or social behavior, while also exploring the neurobiological or physiological  processes which underlie certain functions or behaviors. Psychologists try to explore such concepts like as cognition, personality, perception, attention, phenomenology, emotion, motivation, brain functioning, behavior, and interpersonal relationships.