American family has become the most important part of American life since the era of colonies. Family is a part of certain society, thus the family�s way of life becomes the reflection of the society�s lifestyle. Since the family �plays the chief role in molding the character of every individual in human society� (Barnes and Ruedi, 1971:641), it is necessary to discuss the shaping of a child�s behavior. This study uses interdisciplinary approach which involving theory of behaviorism of B.F. Skinner and also social science. This study will do research on a novel entitled The Story of Edgar Sawtelle by American author David Wroblewski. The aim of this study is to analyze the behavior formation of Edgar Sawtelle, as the main characte...