What is CBT and how does it work?

Answered by Dr. Nitnem Singh Sodhi · Mental Health Counsellor, Neuropsychologist & Psychotherapist · Updated 2026-06-10

Short answer

CBT is a short, structured therapy that identifies the automatic thoughts and behaviours maintaining a problem, tests them against reality, and installs more workable ones. It is the most evidence-supported psychotherapy for anxiety, depression, insomnia, OCD and panic.

The core idea

Situations do not directly cause feelings — the interpretation the mind makes of the situation does. CBT makes those interpretations visible, examines whether they are accurate and useful, and then rehearses new patterns until they become automatic. It is present-focused, skills-based, and structured — usually 8 to 20 sessions.

What a session actually looks like

You set an agenda together. You review the last week and any between-session practice. You pick a live example, break it into situation → thought → feeling → behaviour → outcome, and identify where the loop can be interrupted. You leave with a specific, small experiment to run before the next session. Repeat.

What it is good at and where it stops

Best evidence: anxiety disorders, depression, insomnia, panic, OCD (as ERP), social anxiety, health anxiety. Less suited as a standalone for complex trauma, personality-level patterns and deep grief, where other modalities (EMDR, schema therapy, IFS) do more of the heavy lifting.

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