Question

emily and madison go to las vegas to play the slot machines and satisfy their gambling habit. their behavior is operating on a schedule of reinforcement. variable-ratio variable-interval fixed-interval fixed-ratio

Explanation:

Slot machines operate on a variable - ratio schedule. In a variable - ratio schedule, reinforcement (winning in this case) is delivered after an unpredictable number of responses (pulls of the slot machine lever). This leads to a high and steady rate of responding as the gambler keeps trying in hopes of the next win. In a variable - interval schedule, reinforcement is based on an unpredictable time interval. In a fixed - interval schedule, reinforcement is given after a fixed time interval. In a fixed - ratio schedule, reinforcement is given after a fixed number of responses. Since slot machines don't have a fixed time or number of pulls for a win, but an unpredictable number of pulls (variable - ratio).

Answer:

Variable - Ratio