Who identified four identity statuses that represent the four possible combinations of the dimension of commitment and exploration in adolescents?

Marianne Birkeland is known for her contributions to the field of psychology, particularly in the areas of adolescent development and identity, but she did not propose the identity statuses framework that specifically categorizes commitment and exploration. Her work does not encompass the four statuses as defined by Marcia.

Erik Erikson is famous for his theory of psychosocial development, which outlines eight stages across the lifespan, including the stage focused on identity in adolescence. However, he did not specifically define the identity statuses that combine commitment and exploration; this conceptualization is attributed to James Marcia.

Susan Harter has made significant contributions to understanding self-concept and self-esteem in adolescents, but she did not develop the theory of identity statuses. Her research primarily focuses on how adolescents perceive themselves rather than categorizing identity development into statuses based on commitment and exploration.