Cognitive Behavioural Therapy — commonly known as CBT — is today one of the most widely practised and rigorously researched methods of psychotherapy in the world. Guidelines from organisations such as NICE (the UK’s National Institute for Health and Care Excellence) recommend CBT as the first-line treatment for depression, anxiety disorders, PTSD, OCD, and many other difficulties. So what makes this method work — and what can you expect if you decide to try it?

Where did CBT come from?

CBT grew out of two traditions: the behavioural therapy of John Watson and B.F. Skinner (focused on behaviours and their consequences) and the cognitive revolution pioneered in the 1960s by psychiatrist Aaron Beck. Working with patients experiencing depression, Beck noticed something that seemed obvious yet had been overlooked by earlier theories: his patients didn’t suffer simply because they had been through difficult events. They suffered because of the specific — and often distorted — way they interpreted those events and themselves.

At the same time, Albert Ellis was developing Rational Emotive Behaviour Therapy (REBT), based on a similar premise: the source of our suffering is not facts themselves, but the beliefs we form about them.

CBT emerged from the merging of both traditions — an approach that takes into account both thoughts and beliefs (cognition) and behaviours and their patterns.

The cognitive model: thoughts, emotions, behaviours

The central concept in CBT is the cognitive model. It proposes that in any given situation, between a stimulus and our emotional response there are automatic thoughts — rapid, often unconscious interpretations of events.

Here’s an example: two people receive a brief email from their manager saying “Come see me tomorrow morning.” One person interprets this as a routine meeting invitation. The other sees it as a sign they’re about to be fired. Same message, two completely different emotional reactions (calm vs. anxiety), which then lead to different behaviours (a normal evening vs. sleeplessness and catastrophising).

In CBT, we learn to catch these automatic thoughts, examine how accurate they really are, and — where they turn out to be distorted — replace them with more balanced and realistic interpretations.

At a deeper level, CBT also addresses intermediate beliefs (assumptions like “If I make a mistake, others will reject me”) and core beliefs — deep, often childhood-formed convictions about oneself and the world, such as “I am not good enough” or “The world is dangerous.”

What does a CBT session look like?

A CBT session is typically more structured than sessions in many other therapeutic approaches. Common elements include:

  • Brief review of the week — what happened, how you’re feeling in relation to your therapeutic goals.
  • Follow-up from the previous session — whether the agreed homework was completed, and what came of it.
  • Work on the current topic — identifying automatic thoughts, analysing thought patterns, working on beliefs.
  • Homework — agreeing on specific exercises or behavioural experiments to try before the next session.

That last element — work between sessions — is one of CBT’s defining features. The therapist’s office isn’t the only place where change happens. Change happens in everyday life, in real situations. The session is a space for learning and reflection; practice takes place the other six days of the week.

Who is CBT suitable for?

CBT has an evidence base for:

  • Depression — including single episodes and relapse prevention
  • Anxiety disorders — GAD (generalised anxiety disorder), panic disorder, social anxiety disorder, agoraphobia, specific phobias
  • OCD — obsessive-compulsive disorder (in the CBT variant with exposure and response prevention, ERP)
  • PTSD — psychological trauma (including trauma-focused CBT and EMDR as a related approach)
  • Burnout and chronic stress
  • Relationship difficulties — both individually and in couples therapy
  • Sleep disorders (CBT-I — for insomnia)
  • Eating disorders

CBT tends to be less suitable for people in an acute psychotic episode or those who require intensive pharmacological stabilisation. In such cases, therapy typically complements psychiatric treatment rather than replacing it.

How long does CBT take?

CBT is by design a time-limited therapy. A standard course of treatment is usually 12–20 sessions (fewer for specific phobias, more for complex trauma or long-standing depression). Compared to years-long psychodynamic therapies, that’s a relatively short time — but its effectiveness doesn’t come from cutting corners; it comes from a very specific and purposeful use of every therapeutic hour.

Long-term follow-up research shows that CBT’s effects are lasting: patients who complete CBT are less likely to experience relapse than those who have only taken medication. This is because CBT teaches not just how to feel better, but how to think and act in ways that protect against future difficulties.

CBT is not “just think positive”

A common misconception is to equate CBT with advice to “think positively.” This is profoundly mistaken. CBT doesn’t ask you to replace dark thoughts with rosy ones. It asks you to subject them to critical examination — the same way you would examine any other claim. If, after careful analysis, a negative thought turns out to be justified, CBT helps you find a way to act in a difficult situation. If it turns out to be distorted — CBT helps you see that clearly, without self-deception.

This approach is closer to the scientific method than to coaching-style optimism. And that’s precisely why it works.

Piotr – brainlab.center · Środa Wielkopolska · online sessions