Contents: P.M. Westenberg, A. Blasi, L.D. Cohn, Introduction: Contributions and Controversies. Part I:The Nature of Ego Development.A. Blasi, Loevinger's Theory of Ego Development and Its Relationship to the Cognitive-Developmental Approach. D.P. McAdams, Ego, Trait, Identity. R. Kegan, L. Lahey, E. Souvaine, From Taxonomy to Ontogeny: Thoughts on Loevinger's Theory in Relation to Subject-Object Psychology. D. Westen, Loevinger's Theory of Ego Development in the Context of Contemporary Psychoanalytic Theory. R.R. Holt, Loevinger's Conception of Ego Development and General Systems Theory. Part II:Construct Validity.P.M. Westenberg, J. Jonckheer, P.D.A. Treffers, M.J. Drewes, Ego Development in Children and Adolescents: Another Side of the Impulsive, Self-Protective, and Conformist Ego Levels. J.L. Pals, O.P. John, How Are Dimensions of Adult Personality Related to Ego Development? An Application of the Typological Approach. L.D. Cohn, Age Trends in Personality Development: A Quantitative Review. A.G. Rogers, Understanding Changes in Girls' Relationships and in Ego Development: Three Studies of Adolescent Girls. Part III:Related Developmental Models.J. Snarey, Ego Development and the Ethical Voices of Justice and Care: An Eriksonian Interpretation. L.H. Schultz, R.L. Selman, Ego Development and Interpersonal Development in Young Adulthood: A Between-Model Comparison. S.T. Hauser, E.B. Gerber, J.P. Allen, Ego Development and Attachment: Converging Platforms for Understanding Close Relationships. G. Labouvie-Vief, M. Diehl, The Role of Ego Development in the Adult Self. R. Josselson, On Becoming the Same Age as One's Mother: Ego Development and the Growth of Subject-Subject Relationship. Part IV:Clinical Implications.J. Rierdan, Ego Development, Pubertal Development, and Depressive Symptoms in Adolescent Girls. G. Noam, Solving the Ego Development--Mental Health Riddle. M. Horowitz, Organizational Levels of Self and Other Schematization. P. Young-Eisendrath, C. Foltz, Interpretive Communities of Self and Psychotherapy. L.D. Borders, Ego Development and Counselor Development. Postscript: J. Loevinger, Completing a Life Sentence.