Part I. This essay provides concise explanations of two paradigms used to explore personality, Erikson's Psychosocial Theory and Tajfel's Social Id Theory (SIT). After that it explores how each theory has been used to build up understanding of personality. A psychological methodology is a theory formed by the psychologist, providing an explanation of a subject from a specific view point. No specific approach is correct nor can be substantiated. Ideas may be modified or..