Elicitation and punishment of intraspecies aggression by the same stimulus.

Burgess et al. (1971) worked with pairs of rats in a small cage.

Each rat got a brief electric shock through the floor grid.

The shock made the rats instantly fight each other.

Right after the fight started, the same shock came on again and stayed until the fighting stopped.

The researchers turned this extra shock on and off across several ABAB cycles.

When the extra shock punished the fighting, the battles almost disappeared.

When the extra shock was removed, the fighting bounced right back.

The same stimulus could both trigger aggression and later stop it, depending on timing.

CHARNEY et al. (1965) first showed that a quick tail-pinch makes monkeys attack objects.

L et al. built on that by asking, "Can the same aversive stimulus also punish the aggression it just caused?"

Shahan et al. (2023) revisited punishment 52 years later.

They warn that suppression may come from the sheer pain of the punisher, not from any learned signal.

That view lines up with L et al.: the extra shock worked only while it was present, so its aversive strength, not a lasting cue, did the work.

Fyfe et al. (2007) later moved the logic to humans.

They paired a red light with timeout for stereotypy in adults with ID.

The red light alone then cut stereotypy, showing punishment can create a useful discriminative stimulus in clinical settings.

You now have lab proof that even reflexive aggression can be turned off by a punisher.

The effect, however, is temporary; remove the punisher and the behavior returns.

Use this as a reminder to pair any aversive-reduction plan with reinforcement for alternate behaviors, and to program for maintenance long after the punisher is gone.