Autoshaping of key pecking in pigeons with negative reinforcement.

Redd (1969) worked with pigeons in a small lab chamber.

A key lit up before every shock.

If the bird pecked the key, the shock came off early.

No food, no praise—just less shock.

The team wanted to know if birds would learn to peck simply because the keylight kept predicting relief.

Every bird started pecking the key.

The keylight alone was enough to make the birds orient, then peck.

Learning happened even though the shock would stop on its own.

Autoshaping works with negative reinforcement, not just food.

Zentall et al. (1975) copied the setup but used grain instead of shock.

Their birds also pecked, proving autoshaping crosses reinforcer types.

Wheatley et al. (1978) went further and gave pigeons two keys, each tied to its own shock-reduction schedule.

The birds matched their pecks to whichever key gave more relief, showing the matching law holds for negative reinforcement.

Hake et al. (1972) warned that shock makes pigeons tuck their necks—an opposite move to stretching for a key.

H’s birds still learned, so the neck-flex problem can be overcome when the signal clearly predicts relief.

You now know an aversive signal can become a cue for approach.

If a client pulls back when the buzzer sounds, try pairing that buzzer with quick removal of something unpleasant.

Let the buzzer predict relief, then place the desired response right after the buzzer.

The response may autoshape itself without extra prompting.