This study will evaluate the application of TFP-A, (a empirically validated treatment for adults with identity disturbance), to adolescents exhibiting the same behavioral and identity pathology. Subjects will be females; ages 14-21, with behaviors associated with identity problems, interpersonal difficulties with teachers, parents and/or peers, and live with their families. These adolescents will be randomly assigned to one of two treatment cells, TFP-A or Treatment as Usual (TAU). Subjects in TFP-A will receive weekly individual therapy for six months. The TAU group will receive standard individual therapy in the Outpatient Department. Both will receive medication as necessary. All subjects will participate in initial, weekly, and bi-monthly assessments during the six-month treatment period, and participate in a naturalistic follow-up study for an additional six months.