Abstract
Azrin and Nunn introduce habit reversal — build awareness of the habit, then deploy a physically incompatible competing response when the urge appears — producing large reductions in nervous habits and tics across multiple clients.
Azrin, N. H., & Nunn, R. G. (1973). Habit-reversal: A method of eliminating nervous habits and tics. Behaviour Research and Therapy, 11(4), 619–628. DOI
Key findings
- Awareness first — Clients learn to detect early cues before the full habit chain completes — discrimination training is not optional garnish.
- Competing response — A physically incompatible action held briefly when the urge fires interrupts the chained behaviour — the core active ingredient in later reviews.
- Large reductions — Nail-biting, tics, and related repetitive habits show marked decrease in frequency within short treatment windows in the original case series.
- Multi-component package — Original protocol bundles motivation and generalisation steps — later reviews (Miltenberger et al., 1998) show simplified awareness + competing-response versions retain most gains.
Limits
Original report is a case-series demonstration, not a modern RCT — effect sizes come from small N and clinician-delivered training. Competing-response duration and physical incompatibility were later parametrically tuned — do not treat one fixed hold time as universal law for every habit domain.
Application
When you taper a default (scroll, sugar, avoidance), swap one ingredient at a time — remove the old cue-linked act and install an incompatible micro-response, not a January identity rewrite. Pair Progressive subtraction · Master of Opposites.