In operant conditioning, a schedule of reinforcement where a response is reinforced after an unpredictable number of responses is known to yield consistent results. This reinforcement schedule produces a high rate of responding because the individual never knows when the next reinforcement will come. A common example is gambling, where a reward (winning) is given after a varying number of plays. The unpredictability keeps individuals engaged, hoping for the next reward.
This type of schedule is highly resistant to extinction compared to fixed-ratio schedules. Because reinforcement is unpredictable, individuals are less likely to stop responding after a period without reinforcement. Historically, its effectiveness in maintaining behavior has been crucial in understanding various real-world phenomena, from sales strategies to certain addictive behaviors. Its understanding allows for strategic applications in behavior modification techniques.