Negative reinforcement without shock reduction.

Scientists watched rats press a lever to delay electric shocks.

The shocks still came just as often, only later.

They wanted to know if mere delay, not fewer shocks, could keep the lever pressing alive.

The rats kept pressing when the lever bought them extra safe seconds.

Pressing stopped only when the delay ended up giving more shocks.

Postponement alone was enough to power the behavior.

Peterson (1968) first showed that cutting the real number of shocks keeps avoidance going even when the chance of shock stays high. Hineline (1970) tightens the screw: no cut is needed, just a delay.

Mellitz et al. (1983) later stretched the idea to whole sessions; rats worked to shorten the aversive period itself.

Zeiler (1977) ran a similar test with monkeys and fixed-ratio schedules. Responding held steady even when the overall shock rate never changed, backing up the same point with a different procedure.

You now know that negative reinforcement can work by simply pushing the aversive event farther away, not removing it.

In practice, a brief timeout or a short response-cost delay can strengthen behavior even if the client still faces the same final demand.

Use delay thoughtfully: make sure the postponement truly benefits the client and does not accidentally increase the overall task or consequence load.