Acquired stimulus control of drug-induced changes in aggressive display in betta splendens.

Scientists paired colored lights with drugs in fighting fish.

The lights came on every time the fish got morphine or phenergan.

Later they showed the lights alone to see if aggression still jumped.

The colored lights alone made the fish act drugged.

Aggressive displays popped up even when no drug was in the tank.

A plain light gained stimulus control through simple pairing.

McMillan et al. (1967) got the same slow effect with mild shock.

Lowe et al. (1974) showed noise needs a shock history to control escape.

All three tell the same story: neutral cues turn powerful only after they share time with something aversive or drug-like.

Renne et al. (1976) add a twist: visual cues win with appetitive tasks, while auditory cues win with avoidance.

The fish study fits the visual-win rule because the cue was a light and the payoff was drug-state change.

Your client’s world is full of accidental cues.

A chair, a hallway, a staff face can pick up control if it keeps company with reinforcers or punishers.

Track what stimuli repeat with strong events.

Either break the pair or build it on purpose to shape new behavior.