This chapter will:

Expand on the descriptions provided in Chapter 3 about how to design clinical trials and describe the types of review articles that are used to compare and evaluate outcomes.

Consider the types of questions being asked when it comes to evaluating outcomes given that different audiences ask different questions.

Provide summaries and examples about what has been learned about psychotherapy effectiveness as it relates to different approaches to psychotherapy but also to the different disorders that may benefit from psychotherapy.