Selective sensitivity of schedule-induced activity to an operant suppression contingency.

Researchers worked with pigeons on a fixed-time food schedule. Every 60 seconds the birds got grain no matter what they did.

Between deliveries the birds started pacing and pecking at the floor. The team then added a rule: if the bird moved during the last 5 seconds before food, the next delivery was pushed back 15 seconds. They wanted to see if this penalty could stop the extra activity.

The setback worked. The birds quickly learned to stand still near the end of each interval.

When the penalty was removed the pacing came back. When it was returned the birds froze again. The behavior was clearly under operant control, not just a reflex.

Reid et al. (2005) later showed the same schedule-control idea works with preschoolers. Kids learned to ask for teacher attention only during colored-light cues. When the lights were removed the timing still held, proving the rule had transferred to the reinforcement itself.

WEISSMAN (1963) had earlier found that shortening the "limited hold" for food hurt pigeons' stimulus control. Davidson et al. (1992) solved a similar problem by using a setback instead of a time cut-off, keeping the schedule clear to the bird.

Harrison et al. (1975) used DRO to cut a child's compliance; W et al. used a setback to cut schedule-induced movement. Both show that any behavior—even one that looks automatic—can be turned off if you make it cost something.

If pacing, hand-flapping, or other "schedule-induced" behaviors pop up during breaks or fixed-time reinforcement, you now have a tool. Add a brief delay to the next reinforcer when the extra motion occurs. The cost can suppress the behavior without punishment or restraint. Test it in 5-minute probes, track rate changes, and fade the delay once the movement drops.