Gambling at a slot machine is an example of a variable ratio (VR) reinforcement schedule.

Explanation of Reinforcement Schedule

• Variable ratio schedules reinforce a behavior after an unpredictable number of responses, which keeps the behavior strong and persistent since the reward is uncertain but possible after each attempt.
• Slot machines are designed to reward players after a varying number of lever pulls, with no fixed pattern, which encourages continuous play because the next pull might yield a win.
• This schedule is highly effective in maintaining behavior, as seen in gambling, because it creates a high and steady response rate resistant to extinction.

Summary

In operant conditioning terms, the slot machine’s payout system is a classic example of the variable ratio reinforcement schedule, where reinforcement (winning) occurs after an unpredictable number of plays, making the behavior (gambling) very persistent and resistant to extinction.