Prolonged exposure: stay until distress drops

Enter the feared situation and stay until anxiety peaks and then noticeably decreases on its own.

Why it works

Habituation — the brain’s reduction of the fear response with sustained, non-catastrophic exposure — requires enough time in the feared context for the amygdala to update its prediction. Leaving while anxiety is still high reinforces the association between escape and relief, teaching the brain that leaving was the right move. Staying until anxiety begins to drop within-session teaches the opposite: the threat is survived without the escape.

How to do it

1. Enter the feared situation with no escape plan.
2. Rate your anxiety at the start (0–100 SUDS).
3. Stay in the situation — do not distract yourself, reassure yourself, or use a safety behavior.
4. Rate anxiety every 5 minutes. Wait for the rating to drop at least 50% from peak before leaving.
5. Record the peak and ending SUDS after each practice; track within-session and between-session change.

Evidence

Within-session habituation was long considered the mechanism of exposure therapy; more recent inhibitory learning models suggest that extinction learning (new safety memory) may be equally or more important than habituation per se. Both frameworks support prolonged, non-avoidant engagement. (rct)

The debate between habituation and inhibitory learning models matters for optimization, not for whether to stay in the situation — both frameworks agree that escape before distress reduces is counterproductive.

Sources

• Craske et al. (2014), maximizing exposure therapy: an inhibitory learning approach, Behaviour Research and Therapy

Common mistake

Leaving the situation when distress is at its highest because "I can’t take it anymore" — this is exactly the point that most powerfully reinforces avoidance, because escape brought relief.