Variable Interval Schedule

A Variable Interval Schedule is a type of reinforcement used in learning and behavior that provides rewards at unpredictable time intervals. For example, a worker might receive praise randomly throughout the day, not after a set period. Because the timing varies, individuals tend to stay consistently engaged, checking or working without knowing exactly when the next reward will come. This schedule helps maintain steady behavior, as the unexpected nature of reinforcement encourages ongoing effort. It’s commonly used in situations where continuous, reliable response is beneficial, and the uncertainty keeps motivation high.