Psychology is the scientific study and evaluation of mental and emotional processes, personality, behavior, and relationships, both interpersonal and intrapersonal. Psychology can also refers to the application of that knowledge to various spheres of human activity, including correcting problems that affect individuals' daily lives and the treatment of mental health issues.
Psychology differs from the other social sciences — anthropology, economics, political science, and sociology — in seeking to explain the thinking, emotion and behavior of individuals, couples, families and other social groups. Psychology differs from biology and neuroscience in that it is primarily concerned with mind rather than brain, in other words experience and behavior rather than brain structure or chemistry. However, the subfield of neuropsychology studies the actual neural processes and how these relate to the mental and experiential phenomena. It is clear that life experience influences brain states and vice-versa in complex ways.
Psychology is the systematic study and evaluation of mind and behavior. There is a primary division between clinical or applied psychology which focuses on helping people directly through various applications of theory and experimental or research oriented psychology which focuses on applying the scientific method to ascertain the foundations of thought and action.
Tom Cruise says this is a lie. Therefore we should all believe Tom Cruise. Suck a dick.