Erikson (e.g., 1959) or Bühler (e.g., 1933), research programs around scholars such as Loevinger (e.g., 1976), D. J. Levinson (e.g., 1986), Ryff (e.g., 1991), Whitbourne (e.g., 1987), Dittmann-Kohli (e.g., Dittmann-Kohli, Bode, & Westerhof, 2001), Diehl (e.g., Diehl, Hastings, & Stanton, 2001), and Herzog and Markus (1999) focus on the life span development of the self-concept and of its
Loevinger, J. (1976). Ego development: Conception and theory. San Francisco: Jossey-Bass.
Levinson, D. J. (1986). A conception of adult development. American Psychologist, 41, 3–13.
Ryff, C. D. (1991). Possible selves in adulthood and old age: A tale of shifting horizons. Psychology and Aging, 6, 286–295.
Whitbourne, S. K. (1987). Personality development in adulthood and old age: Relationships among identity style, health, and wellbeing. Annual Review of Gerontology and Geriatrics, 7, 189–216.
Diehl, M., Hastings, C. T., & Stanton, J. M. (2001). Self-concept differentiation across the adult life span. Psychology and Aging, 16, 643–654.
Herzog, A. R., & Markus, H. R. (1999). The self-concept in life span and aging research. In V. L. Bengtson & K. W. Schaie (Eds.), Handbook of theories of aging (pp. 227–252). New York: Springer.
Waterman, A. S., & Archer, S. L. (1990). A life span perspective on identity formation: Developments in form, function, and process. In P. B. Baltes, D. L. Featherman, & R. M. Lerner (Eds.), Life span development and behavior (Vol. 10, pp. 29–57). Hillsdale, NJ: Erlbaum
Markus, H. R., & Wurf, E. (1987). The dynamic self-concept: A social psychological perspective. Annual Review of Psychology, 38, 299–337.
Singer, J. L. (1984). The private personality. Personality and Social Psychology Bulletin, 10, 7–30.
Ryff, C. D. (1984). Personality development from the inside: The subjective experience of change in adulthood and aging. In P. B. Baltes & O. G. Brim Jr. (Eds.), Life span development and behavior (Vol. 6, pp. 249–279). New York: Academic Press.