Psychology › Therapy & treatment
Cognitive behavioral therapy (CBT; Beck, Ellis)
Ellis 1955; Beck 1960s· Therapy or method
Well replicatedStrong, repeated evidence.
A structured, short-term talk therapy that changes unhelpful thoughts and behaviors to relieve problems such as depression, anxiety and insomnia.
See it on the Psychology map →What it says
Albert Ellis launched his rational therapy in 1955, challenging beliefs like 'I must be liked by everyone'. In the 1960s psychiatrist Aaron Beck, studying depressed patients in Philadelphia, noticed automatic negative thoughts about the self, the world and the future. CBT teaches clients to catch such thoughts, test them against evidence and try new behaviors, with homework between sessions. A typical course runs 6 to 20 weekly sessions. It absorbed behavior therapy's exposure methods and now has versions for dozens of conditions.
Why it matters
It became the most studied and most widely recommended talk therapy, the default in clinical guidelines and in public programs such as England's NHS Talking Therapies.
Think of it like
Like auditing a pro forma: test each gloomy or rosy assumption against the actual numbers before acting on the forecast.
The evidence
Status: well replicated. Hundreds of randomized trials and meta-analyses support it for depression, anxiety, insomnia and more. Effects are real but often smaller in newer, better-controlled trials than in early ones.
Open questions
Whether changing thoughts is the active ingredient: in some studies the behavioral parts alone work about as well, and improvement can come before thoughts change.
Inside this (3)
Connections (8)
▸Cognitive behavioral therapy (CBT; Beck, Ellis) treats the insomnia behind Sleep loss, the body clock and healthWell replicated
The connection
CBT for insomnia (CBT-I) targets the habits and worries that keep poor sleep going. It limits time in bed to actual sleep time, reserves the bed for sleep, fixes a wake-up time and challenges anxious thoughts about sleeplessness. Over four to eight sessions, sleep usually becomes deeper and more efficient.
Who showed it and when
Built from Richard Bootzin's stimulus control (1972) and Arthur Spielman's sleep restriction (1987), combined into CBT-I in the 1990s by researchers including Charles Morin in Quebec.
The evidence
Trials and meta-analyses show CBT-I matches sleeping pills short term and outlasts them; the American College of Physicians made it first-line treatment in 2016.
Open questions
Trained providers are scarce, so digital versions are being tested; whether treating insomnia also helps prevent depression is under study.
▸Cognitive behavioral therapy (CBT; Beck, Ellis) drew on The cognitive revolutionWell replicated
The connection
Behaviorism had dismissed thoughts as unscientific. The cognitive revolution made mental processes such as beliefs, attention and memory legitimate subjects again. Beck and Ellis applied that view to therapy: how people interpret events drives their emotions, so changing interpretations changes feelings and behavior.
Who showed it and when
From the late 1950s to the 1970s; Albert Bandura, Donald Meichenbaum and Michael Mahoney helped merge cognitive and behavior therapies into 'cognitive-behavioral' therapy.
The evidence
Beck's 1976 book Cognitive Therapy and the Emotional Disorders and the journal Cognitive Therapy and Research, founded in 1977, record the shift explicitly.
Open questions
Beck credited clinical observation more than lab psychology, so historians debate whether CBT grew from the cognitive revolution or developed alongside it.
▸Cognitive behavioral therapy (CBT; Beck, Ellis) is a leading treatment for Eating disordersWell replicated
The connection
Enhanced CBT (CBT-E) targets the core belief that self-worth depends on weight and shape. Patients establish regular eating, drop strict dieting rules that trigger binges, and tackle body-checking and shape worries. It is first-line for bulimia and binge-eating disorder and is used for anorexia in adults.
Who showed it and when
Christopher Fairburn at Oxford developed CBT for bulimia in the early 1980s and the broader CBT-E for all eating disorders in 2008.
The evidence
Controlled trials show many bulimia and binge-eating patients stop bingeing; the UK's NICE guidelines (2017) recommend eating-disorder-focused CBT.
Open questions
For anorexia, especially in teenagers, family-based treatment often works better, and why relapse is common after any treatment is poorly understood.
▸Cognitive behavioral therapy (CBT; Beck, Ellis) is the most tested form of Talk therapy (psychotherapy)Well replicated
The connection
CBT's short, structured, manual-based format made it easy to test in randomized trials, so it built up more evidence than any other talk therapy. That evidence made it the default recommendation in many clinical guidelines and government-funded programs.
Who showed it and when
Trials began with Beck's team's 1977 depression study in Philadelphia; there are now hundreds of trials for depression alone and thousands overall.
The evidence
Meta-analyses by Pim Cuijpers and others, and Stefan Hofmann's 2012 review of 269 meta-analyses, document the size of the evidence base.
Open questions
Most tested is not the same as best: in head-to-head comparisons, other well-run therapies often perform similarly, the so-called Dodo bird debate.
▸Exposure therapy is a core technique of Cognitive behavioral therapy (CBT; Beck, Ellis)Well replicated
The connection
Exposure began in behavior therapy and was folded into CBT as cognitive and behavioral methods merged. For anxiety disorders, OCD and PTSD it is often the most powerful part of a CBT program, with thought-challenging used to support it.
Who showed it and when
Joseph Wolpe's work in South Africa and, from 1965, Philadelphia; merged with Beck's cognitive therapy through the 1970s and 1980s.
The evidence
Dismantling studies, which test parts of CBT separately, often find exposure accounts for much of the benefit for anxiety disorders.
Open questions
Whether cognitive techniques add much beyond exposure for anxiety, or exposure works partly by changing beliefs, remains debated.
▸Dialectical behavior therapy (DBT) adapts Cognitive behavioral therapy (CBT; Beck, Ellis)Well replicated
The connection
DBT kept CBT's structure, skills training, homework and step-by-step analysis of problem behaviors, but added acceptance, validation and Zen-derived mindfulness. Linehan had found that purely change-focused CBT made highly suicidal clients feel blamed, and many dropped out.
Who showed it and when
Marsha Linehan, a behavior therapist at the University of Washington in Seattle, developed it through the 1980s; manuals published in 1993.
The evidence
Linehan's own manuals describe DBT as a form of CBT, and treatment guidelines and reviews classify it as one.
Open questions
Whether its acceptance elements make DBT truly distinct from CBT, or mainly a well-packaged extension of it, is debated.
▸Cognitive behavioral therapy (CBT; Beck, Ellis) is a first-line treatment for Depression and mood disordersWell replicated
The connection
CBT for depression teaches patients to spot and test negative automatic thoughts and to schedule rewarding activities, countering withdrawal. In trials it works about as well as antidepressants for many patients, and its benefits tend to last longer after treatment ends.
Who showed it and when
Aaron Beck's cognitive therapy at the University of Pennsylvania; his team's 1977 trial compared it with the antidepressant imipramine.
The evidence
Hundreds of trials; a 2005 Penn–Vanderbilt study by Robert DeRubeis and Steven Hollon found it matched medication for moderate to severe depression, with fewer relapses afterward.
Open questions
Effects in newer, better-controlled trials look smaller than in early ones, and simpler behavioral activation may work about as well.
▸Cognitive behavioral therapy (CBT; Beck, Ellis) is a first-line treatment for Anxiety disordersWell replicated
The connection
CBT for anxiety combines gradual exposure to feared situations with testing catastrophic predictions, such as 'my racing heart means a heart attack'. It treats panic disorder, social anxiety, generalized anxiety and phobias, typically in 8 to 16 sessions, and its gains often outlast those of medication.
Who showed it and when
David Clark at Oxford and David Barlow in the US developed influential panic treatments in the 1980s; protocols for social anxiety and chronic worry followed in the 1990s.
The evidence
Many randomized trials and meta-analyses support it; the UK's NICE guidelines recommend it as a first treatment for most anxiety disorders.
Open questions
Perhaps 40 to 50 percent of patients still have notable symptoms after treatment; how to help them is a major research question.