Ego development in perspective: Structural stage,functional phase,and cultural age-period models

Ego development is emerging as one of the more important areas of research in developmental psychology. This paper presents a structural stage approach to ego development and distinguishes it from two other models of ego development, which are termed functional phases and cultural ages. Two subtypes are also delineated within the structural stage approach—a monodomain and a multisubdomain—and the latter is argued for. These concepts are then illustrated through an analysis of four prominent ego development theories—those of Robert Selman, Robert Kegan, Jane Loevinger, and Erik Erikson. The important similarities and critical differences of the theories are clarified, which enables the authors to present a summary integration.