The main motive is to understand and explain how the mind works and how various mental processes result in various behaviors. Psychologists explain behaviur and experiences in different manners. Some of them make their analysis more scientific and objective while others explain behavior from the point of view of the experiencing individual because they consider that subjectivity is a necessary aspect of human experience. Psychology as a discipline has its focus largely on biological principles to explain individual behavior.
Any knowledge discipline is very difficult to define because it evolves continuously and the range of phenomena that is studied cannot be hooked by any one definition.This is even more true for psychology. The most interesting feature of this discipline lies in the study of psychological processes which are mostly innate and are available to individuals for observation within themselves.