The treatment of covert self-injury through contingencies on response products.

The team worked with someone who hurt themselves in ways no one could see.

They set up monthly doctor checks.

If the exam showed no new cuts or bruises, the person got a big reward.

No punishment was used.

The study ran long enough to see if the gains stuck.

Month after month, skin stayed clear.

Success was near perfect.

The good results lasted at least ten months.

Reinforcing the absence of damage kept the person safe.

Catania et al. (1974) used a similar idea in a state home.

They rewarded kids for not hitting themselves and saw big drops.

The new study shows the same trick still works two decades later.

Duker et al. (1996) tried the opposite tool that year: mild electric shock.

Shock also cut self-injury, but it is harder to use and raises ethics flags.

Staddon et al. (2002) later showed shock can work for five years, yet the current paper proves you can get long safety with only rewards.

Together, the line says: start nice, stay nice, and you may never need the harsh stuff.

You can copy this tomorrow.

Pick a clear, delayed cue—like a weekly nurse check—and deliver a strong reinforcer only when skin is intact.

No extra staff, no punishment, no side effects.

If the client keeps clean, you just saved them from more intrusive plans.