ABSTRACT
Traditionally, the study of developmental psychology involved investigations into childhood and adolescence and, as exemplified by theories of Freud and Piaget, covered only the first 16 years of the human life-span (Mussen et al., 1990). During the past 30 years, however, an interest has emerged in developmental changes associated with adulthood and old age. Concepts and theories have been constructed that engage the individual’s complete life from conception and birth to death (Santrock and Bartlett, 1986). Such work is usually referred to as the study of ‘Life-span Human Development’.
