Intermittent reinforcement of operant behavior in children.

Long et al. (1958) watched children press a lever for marbles. They tried different reward schedules. Sometimes every press paid off. Sometimes only every third, fifth, or tenth press paid off.

The team simply showed the patterns. They did not test if one schedule was better. They wanted a clear picture of how kids act under each rule.

Kids slowed down when rewards got lean. They still pressed, but the pauses grew longer. The data looked like adult rat charts from earlier labs.

No skill was taught. No problem was fixed. The paper just proved that child behavior follows the same schedule laws seen in animals.

Matthews et al. (1987) took the same idea and made it useful. After teaching preschoolers to pick fruit snacks, they thinned rewards to every third time. The healthy choices stuck even when praise and snacks became rare.

Jennett et al. (2003) found a warning. When eight- to eleven-year-olds got free stickers on a fixed-time plan, they later picked easy math problems and made more errors. Same intermittent idea, but the free reward hurt work quality.

These studies do not fight each other. R et al. showed the basic rule. A et al. proved the rule can teach. K et al. showed the rule can back-fire if the reward is not tied to performance.

You now know that intermittent reinforcement works with kids, but the details decide success. Tie rewards to the target skill, not to the clock. Start thick, then thin slowly. Watch for side effects like stereotypy or task avoidance. Use the schedule as a tool, not a treat dispenser.