1.0 Introduction To theories on behavior 1.1 Definition of psychology according to Kalatt (2008) is the systematic study of behaviour aqnd experience. This definition takes cognizant of the mental processes such as thoughts feelings and imagery which though not directly observable but are covert activities of man. The above definition is in support of Meyers’ (1989) definition of psychology as the science of behavior and mental processes. This definition is different from John Wastons definition of psychology as the study of measurable and observable behavior (Waston, 1919). 1.2 Definition of theory As a science, psychology involves systematic gathering of data through observing and measuring events. Psychological theories, like all scientific theories are general principles which explain and summarize many observations and predict what can be expected to happen in new situations (Moragn , King, Weisz & Schopler, 1993). A theo