Applied Behavior Analysis Technician (ABAT) Practice Test

How does a variable ratio schedule differ from a fixed ratio schedule?

1. It delivers reinforcement after a fixed number of responses

2. It delivers reinforcement after a varying number of responses

3. It provides reinforcement at consistent time intervals

4. It is a type of continuous schedule

The correct answer is: It delivers reinforcement after a varying number of responses

A variable ratio schedule is characterized by delivering reinforcement after a varying number of responses, which means the reinforcement is unpredictable and can happen after different numbers of responses each time. This unpredictability encourages a higher and more consistent rate of responding, as the individual works toward the next reinforcement without knowing exactly when it will be delivered. The variability makes this schedule particularly effective in maintaining behavior over time because individuals tend to keep responding in anticipation of the reward. This contrasts with a fixed ratio schedule, where reinforcement is provided after a set, predetermined number of responses, leading to a more predictable and sometimes slower rate of responding as individuals learn the specific requirements. In the context of the other choices, the statement about consistent time intervals pertains to interval schedules rather than ratio schedules, and the mention of a continuous schedule involves reinforcement after every response, which is distinct from both variable and fixed ratio schedules.