Efficacy of a Two‑Session Repetitive Negative Thinking‑Focused Acceptance and Commitment Therapy (ACT) Protocol for Depression and Generalized Anxiety Disorder: A Randomized Waitlist Control Trial

Randomized trial (N=48) comparing a 2-session RNT-focused ACT protocol versus waitlist in patients with depression and/or GAD. At 1 month, the intervention produced significant reductions in emotional symptoms (d≈2.42) and 94% clinically significant change versus 9% in WL; effects were maintained at 3 months. Indicates that very brief RNT-focused interventions can be highly effective.