Long-Term Follow-Up of a Randomized Controlled Trial Comparing Acceptance and Commitment Therapy and Standard Cognitive Behavior Therapy for Anxiety and Depression

► This study represents one of the first comparisons of the long-term effectiveness of traditional cognitive behavior therapy (i.e., Beckian cognitive therapy; CT) and acceptance and commitment therapy (ACT). ► Anxious or depressed outpatients (n = 132) were randomly assigned to receive either CT or ACT. ► At the 1.5-year follow-up, treatment gains were better maintained for those in the CT condition.