Transfer of control of the pigeon's key peck from food reinforcement to avoidance of shock.

The team worked with eight pigeons. Each bird already pecked a key for food on a variable-interval schedule.

They then switched the payoff. A peck now cancelled a brief shock that was about to arrive. No food appeared.

The birds lived under this new rule for twenty days. The researchers counted every peck to see if the food-trained response would survive.

All eight pigeons kept pecking. The response that once earned grain now prevented shock.

The birds never needed fresh shaping. The old topography simply slid onto the new consequence.

Lobb et al. (1977) later added warning lights before shock. Their birds pecked even faster, showing the same transfer can be boosted with signals.

Quilitch et al. (1973) showed that food-key pairings first create the peck. Dove et al. (1974) pick up where they left off, proving that once the response exists it can jump to a new reinforcer class.

Hayes et al. (1975) tweaked food timing to raise or lower autoshaped pecks. The 1974 study moves past these parametrics, asking what happens when food disappears and shock takes over.

You now know that a skill you build with praise or tokens can later protect a client from harm without re-teaching the movement. If a child can already touch a card for candy, you can switch the payoff to escaping loud noise, aversive smells, or social demands. The response stays intact, saving you precious teaching time.