Psychology is an academic and applied field involving the study of behavior and mental processes. 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 anthropology, economics, political science, and sociology in seeking to capture explanatory generalizations about the mental function and overt behaviour of individuals, while the other disciplines rely more heavily on field studies and historical methods for extracting descriptive generalizations. In practice, however, there is quite a lot of cross-fertilization that takes place among the various fields. 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, though the subfield of neuropsychology combines the study of the actual neural processes with the study of the mental effects they have subjectively produced.
Many people associate Psychology with Clinical Psychology which focuses on assessment and treatment of problems in living and psychopathology. In reality, Psychology has myriad specialties including: Social Psychology, Developmental Psychology, Cognitive Psychology, Industrial-Organizational Psychology, Mathematical psychology, Neuropsychology, and Quantitative Analysis of Behaviour to name only a few. The word psychology comes from the ancient Greek ψυχή, psyche ("soul", "mind") and logy, study).
Psychology is a very broad science that is rarely tackled as a whole, major block. Although some subfields encompass a natural science base and a social science application, others can be clearly distinguished as having little to do with the social sciences or having a lot to do with the social sciences. For example, biological psychology is considered a natural science with a social scientific application (as is clinical medicine), social and occupational psychology are, generally speaking, purely social sciences, whereas neuropsychology is a natural science that lacks application out of the scientific tradition entirely. In British universities, emphasis on what tenet of psychology a student has studied and/or concentrated is communicated through the degree conferred: B.Psy. indicates a balance between natural and social sciences, B.Sc. indicates a strong (or entire) scientific concentration, whereas a B.A. underlines a majority of social science credits.