AP® Psychology · Unit 5 · Topic 5.5

Behavior Therapies and Exposure

Behavior therapies treat psychological problems as learned responses, so they use conditioning principles directly: exposure extinguishes fear, and reinforcement reshapes behavior in token economies.

Behavior therapies assume a phobia was learned through conditioning, so it can be unlearned the same way. A fear hierarchy lists feared situations from mildest to most terrifying. Systematic desensitization pairs deep relaxation with each rung of that ladder, starting low. Because you cannot be relaxed and panicked at once, relaxation gradually replaces the fear response at each step before the client moves up. This is counterconditioning: the old stimulus-fear link gets replaced with a stimulus-calm link.

Plain exposure therapy skips the relaxation pairing and just has the client face the feared stimulus repeatedly, without escape and without the dreaded outcome happening. Across sessions, the anxiety response weakens: it spikes high in session one, stays elevated but peaks lower in sessions two and three, and flattens toward a mild response by session six. This decline is extinction, the same process that weakens any conditioned response once it stops predicting danger.

Token economies apply a different half of conditioning: operant, not classical. On a ward or in a classroom, desired behaviors earn tokens that are later exchanged for real rewards, following the logic of secondary reinforcement and shaping. Where desensitization and exposure erase an unwanted learned fear, token economies build up wanted behaviors through reinforcement. Both sit under the same umbrella because both treat the symptom itself as the thing to retrain, not as a sign of some hidden underlying conflict to analyze.

Key terms

Fear hierarchy
A ranked list of feared situations from least to most anxiety-provoking, used to structure gradual exposure.
Systematic desensitization
A behavior therapy that pairs relaxation with each step of a fear hierarchy to replace fear with calm.
Extinction
The weakening of a conditioned response when the stimulus no longer predicts the feared outcome.
Token economy
An operant conditioning system where desired behaviors earn tokens exchangeable for real rewards.
Counterconditioning
Replacing an unwanted learned response to a stimulus with a new, incompatible response.

Watch it explained

  1. How it worksHow does a fear hierarchy climb from the mildest step to the worst one?
  2. How it worksWalk me through systematic desensitization pairing relaxation with each step up the ladder.
  3. Worked exampleDraw the anxiety curve across six exposure sessions to the same feared stimulus.
  4. How it worksHow does a token economy apply operant conditioning to a whole ward or classroom?

Check yourself

Your turn1 of 2
A therapist treating a client's fear of public speaking has the client first imagine speaking in front of one trusted friend, then a small familiar group, and only much later a large unfamiliar audience, with relaxation techniques practiced at each step before moving to the next. What is this graduated structure called, and why is it built this way rather than starting with the most feared scenario immediately?

End of topic.