A 26-year-old female with generalized anxiety disorder has been receiving cognitive behavioral therapy (CBT) for 12 weeks. Her GAD-7 score has decreased from 18 at intake to 11 at the current session. She reports she is using cognitive restructuring techniques regularly and has reduced her avoidance of social situations. However, she continues to experience persistent worry about work performance and physical symptoms of tension. The patient expresses frustration that she is not feeling completely better despite consistent attendance and homework completion. The PMHNP is evaluating psychotherapy treatment outcomes. Which evaluation is most appropriate?