When Aging Begins

By attempting to answer the question, "when does aging begin?" we can develop new theoretical and methodological approaches to understanding the lifespan development. General criteria for such an approach are outlined and a specific theory offered for consideration. The habituation process has been studied effectively in infancy and early childhood. The subsequent course of habituation from later childhood through old age is suggested. A number of potentials and problems inherent in this theoretical approach are briefly discussed, as well as its possible relationship to psychodynamic defensive strategies intended to reduce anxiety.