CONTINUOUS OPPORTUNITY FOR REINFORCING BRAIN STIMULATION.

One rat lived in a cage with a metal bar. Every press sent a tiny pulse to a pleasure spot in its brain.

The rat could press whenever it wanted for 20 full days. No food, no water limits, no breaks.

The animal kept pressing about 29 times every minute. The pace never dropped.

There was no sign of getting tired or full of the stimulation. The behavior stayed strong for almost three weeks.

Schwartz et al. (1971) later showed you can shape the same kind of steady pressing in one hour with food instead of brain current. Their gadget did the work without a human present.

Sharp et al. (2010) pushed rates even higher by slowly asking for more presses before a reward. They reached FR 30 in only four sessions, proving high rates don’t need brain wires.

HERRNSTEISLOANE (1964) ran the opposite test the same year. Shock punishment failed to slow bar pressing in other rats. Together the two 1964 papers show powerful reinforcers beat weak punishers.

You will probably never wire a client’s brain, but the lesson is clear: strong reinforcers keep behavior alive. If you want a skill to stick, pick rewards the learner never gets tired of. Rotate items, let the child choose, or thin the schedule slowly. Watch for signs of satiation like slower responses or wandering eyes. When that happens, swap in a fresh reinforcer before the behavior falls apart.