Titration schedule with rats in a restraining device.

Scientists put rats in a small tube. Each rat could press a lever to lower mild electric shock.

The shock crept back up every few seconds. Pressing again knocked it down. This loop is called a titration schedule.

The rats quickly learned to keep the shock at a low, steady level. Their lever pressing stayed stable for long sessions.

When the researchers turned the shock off, pressing stopped at once. The behavior extinguished immediately.

Rachlin (1972) repeated the idea with pigeons and rats and saw the same stable response rate. The two studies back each other up across species.

Mosk et al. (1984) later showed that stable avoidance only works above a minimum shock intensity. G et al. found steady low-shock performance, while D et al. revealed the floor below which the behavior collapses.

WALLETHOMAS et al. (1963) had already shown that shorter reset intervals let monkeys and humans tolerate more shock. G et al. built on those rules to design the rat lever setup.

The study shows that organisms will work just hard enough to keep aversive events bearable. When the aversive event disappears, the work stops. For BCBAs, this is a reminder to fade or remove aversive components as soon as possible. If you use any form of negative reinforcement, build in clear removal cues and plan for rapid extinction once the aversive is gone.