Acceptance and commitment therapy is probably the most well-researched of all the third-generation behavior therapy models. Its development co-occurred with that of relational frame theory, with several researchers such as Steven C Hayes being involved with both. ACT has been argued to be based on relational frame theory, although this is a matter of some debate within the community. Originally this approach was referred to as comprehensive distancing. Every practitioner mixes acceptance with a commitment to one's values. These ingredients become enmeshed into the treatment in different ways which leads to ACT being either more on the mindfulness side or more on the behavior-changing side. ACT has, as of September 2015, been evaluated in over 130 randomized clinical trials for a variety of client problems. Overall, when compared to other active treatments designed or known to be helpful, the effect size for ACT is a Cohen's d of around 0.6, which is considered a medium effect size.
Community reinforcement approach and family training is a model developed by Robert Meyer and based on the community reinforcement approach first developed by Nathan Azrin and Hunt. The model focuses on the use of functional behavioral assessment to reduce drinking behavior. CRAFT combines CRA with family therapy.
Functional analytic psychotherapy is based on a functional analysis of the therapeutic relationship. It places a greater emphasis on the therapeutic context and returns to the use of in-session reinforcement. The basic FAP analysis utilizes what is called the clinically relevant behavior, which is the client's presenting problem as presented in-session. Client in-session actions that improve their CRB1s are referred to as CRB2s. Client statements, or verbal behavior, about CRBs are referred to as CRB3s. In general, 40 years of research supports the idea that in-session reinforcement of behavior can lead to behavioral change.
Integrative behavioral couples therapy developed from dissatisfaction with traditional behavioral couples therapy. Integrative behavioral couples therapy looks to Skinner for the difference between contingency shaped and rule-governed behavior. It couples this analysis with a thorough functional assessment of the couples relationship. Recent efforts have used radical behavioral concepts to interpret a number of clinical phenomena including forgiveness.
Clinical formulation
As with all behavior therapy, clinical behavior analysis relies on a functional analysis of problem behavior. Depending on the clinical model this analysis draws on B.F Skinner's model of Verbal Behavior or relational frame theory.
