In Treatment With Defiant and Aggressive Adolescents, Fred J. Hanna works with a 17-year-old boy who says he wants to succeed in school, although he also asserts that it is all right to drink and party with his friends. Hanna first assesses the presence of the precursors to change, then creates cognitive dissonance between the two sides of the client's personality so that the client will seek to resolve this split and commit to making changes in his life.