Psychologist is a protected professional title requiring a psychology degree and, for clinical work, postgraduate training and registration. Therapist is a broad umbrella covering many kinds of talking therapy, and in many places it is not a protected title at all — so every clinical psychologist is a therapist, but not every therapist is a psychologist.
The core difference
- psychologist — someone qualified in psychology, the study of mind and behaviour. Clinical and counselling psychologists undergo doctoral or equivalent training and are registered with a professional regulator.
- therapist — anyone who provides therapy. The word covers psychotherapists, counsellors, and specialists such as occupational or speech and language therapists.
Why the distinction matters
In many countries psychologist is legally protected — using it without the qualifications is an offence — while therapist on its own often is not. That is why choosing a practitioner usually means looking at the specific title and the register they appear on, rather than the general word.
And the one people most often mean: psychiatrist
A psychiatrist is a medical doctor who then specialised in mental health. That is the sharpest line in this area, because it determines what they can do:
- psychiatrist — a physician; can diagnose medically and prescribe medication
- psychologist — not a physician; assesses, diagnoses within their scope and delivers psychological therapy, and generally cannot prescribe
- psychotherapist / counsellor — trained in talking therapies, with training length and regulation varying widely
The related fields
Psychology is the study of mind and behaviour; psychiatry is the branch of medicine treating mental illness; psychoanalysis is a specific therapeutic tradition descending from Freud, not a synonym for either.
Frequently asked questions
Is a psychologist a therapist?
A clinical or counselling psychologist provides therapy, so yes in practice. But therapist is a much broader term and many therapists are not psychologists.
What is the difference between a psychologist and a psychiatrist?
A psychiatrist is a medical doctor who can prescribe medication. A psychologist is not a physician and generally cannot prescribe, working instead through assessment and psychological therapy.
Is "therapist" a protected title?
Often not. Psychologist is legally protected in many countries; therapist frequently is not, which is why the specific title and professional register matter.