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Treatment terms

CBT

Shariq Refai, MD, MBA, board-certified psychiatrist and the reviewer of this article.

Reviewed by Shariq Refai, MD, MBA·Updated March 15, 2026·About 3 minutes

About this term

Quick definition
Cognitive behavioral therapy. A structured, time-limited form of psychotherapy that works on the link between thoughts, feelings, and behavior.
Full clinical definition
Cognitive behavioral therapy is a category of evidence-based psychotherapies that target the relationship between cognitions (thoughts, beliefs, interpretations), behaviors, and emotional and physiological responses. The depression-focused versions developed by Aaron Beck and others use techniques including cognitive restructuring, behavioral experiments, activity scheduling, problem-solving training, and graded exposure. CBT for depression is typically delivered in 12 to 20 weekly sessions of 45 to 60 minutes, with structured between-session work.
Epidemiology
CBT is the most studied form of psychotherapy in the world, with hundreds of randomized controlled trials in depression alone. Network meta-analyses place CBT among the most effective psychotherapies for depression, with effect sizes comparable to antidepressant medication for mild to moderate depression (Cuijpers et al., World Psychiatry, 2021).
What it can feel like
Sessions are organized and goal-directed. The therapist and patient set an agenda at the start of each session, review between-session work, focus on a specific problem, and assign new practice. Patients often describe the early sessions as effortful but quickly useful. Symptom improvement usually begins within the first four to six sessions when there is a good fit.
Why it matters
CBT has strong evidence in depression and anxiety. It is one of the most studied forms of psychotherapy. It is also among the easiest to access in workbook, app-based, and group formats, which extends reach when in-person therapy is hard to find.
How clinicians assess fit and progress
An intake visit covers symptoms, prior treatment, and goals. PHQ-9 is tracked over the course of treatment. A response is generally defined as at least a 50 percent reduction in PHQ-9 score. Patients who do not respond after eight to ten sessions are reassessed, and a different approach or addition (often medication) is considered.
Treatment implications
CBT is recommended as first-line for mild to moderate depression alone, and in combination with medication for moderate to severe depression, in APA and NICE guidelines. Internet-delivered CBT and guided self-help CBT have evidence in mild to moderate depression and may be useful when therapist access is limited. CBT also has a role in relapse prevention after recovery.
Related terms
Psychotherapy. Behavioral activation. Major depressive disorder.
Related articles
Treatment.

Sources

  • Beck AT, Rush AJ, Shaw BF, Emery G. Cognitive Therapy of Depression. Guilford Press, 1979.
  • Cuijpers P, et al. Psychotherapies for depression in adults: a network meta-analysis. World Psychiatry. 2021.
  • NICE Guideline NG222.
  • American Psychiatric Association. Practice Guideline for the Treatment of Patients with Major Depressive Disorder.

Frequently asked questions

What is cognitive behavioral therapy?
Cognitive behavioral therapy (CBT) is a structured, time-limited talk therapy that targets the patterns of thinking and behavior that maintain depression. Sessions are active and skill-based. Homework between sessions is part of how it works. CBT has the strongest research evidence of any psychotherapy for depression.
How is CBT different from other therapy?
CBT is more structured, more present-focused, and more skills-based than open-ended supportive or psychodynamic therapy. A typical course is 12 to 20 weekly sessions with a clear plan. The therapist teaches specific tools and works with you to apply them between sessions.
How long does CBT take?
A standard course of CBT for depression is 12 to 20 sessions. Some people see meaningful change earlier. Some need longer, especially when there is a chronic pattern, a co-occurring condition, or trauma in the picture.
Does CBT work as well as medication?
For mild to moderate depression, CBT and antidepressants have similar response rates. For moderate to severe depression, the combination usually outperforms either alone. CBT also has evidence for relapse prevention after recovery, especially mindfulness-based cognitive therapy (MBCT).
What if I cannot find a CBT therapist?
Self-guided CBT workbooks (David Burns' "Feeling Good," Christine Padesky and Dennis Greenberger's "Mind Over Mood") and digital CBT programs have evidence for mild to moderate depression. They are not a substitute for in-person care for severe depression, but they can be a useful starting point or supplement.
What is behavioral activation?
Behavioral activation is a structured therapy that targets the loss of activity and reward in depression. Instead of waiting to feel better before doing more, the person and therapist identify activities that used to bring meaning or pleasure, schedule them in small steps, and notice the effect. It has evidence on par with full CBT for depression.

Last reviewed March 15, 2026.

Every clinical page on DepressionResource.org is written in plain language, dated, and reviewed by a board-certified psychiatrist against current clinical guidelines. See our editorial standards and medical review process.