The Smiths have contacted a psychologist about their son, Aaron. He is always getting into trouble and will not listen at home. The family has labeled him as a “problem child.” Mrs. Smith reports when she gets home at 7:00 pm, he has not done his homework or any of his chores. She is normally too tired from work to argue with him. Mr. Smith works out of town and only comes home on weekends. He reports Aaron wants to hang out with his troubled friends all weekend, instead of spending time with the family. After a clear assessment of the problem, the psychologist suggests what type of therapy?