Developmental psychology, as a discipline, is currently undergoing a paradigmatic/world view change. Consequently, several different theoretical approaches to the study of development and the life course have been proposed and advocated. The three primary approaches currently being debated include the structural, information processing/cognitive, and life-span developmental/developmental dimensions approaches. The purpose of this paper is to examine the differences and similarities between these three broad approaches. However, this exposition would be incomplete without a discussion of the concept of world views (Kuhn, 1970; Pepper, 1942). An individual's theoretical position is affected by their world views. This world view not only affects how an individual conceptualizes a particular field of study but also influences the questions they ask within that field of study. Therefore, this paper will also include a discussion of the three major world views influencing developmental psychology: the organismic, mechanistic,, and contextual world views (Pepper, 1942).…