An individual receives a reinforcement for the first response after some period of time, but the amount of time changes. Sometimes the individual has to wait as much as 3 minutes, sometimes as little as 10 seconds. This is an example of which type of schedule of reinforcement?

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This is an example of a variable interval schedule of reinforcement, where the reinforcement is delivered after varying amounts of time have elapsed since the last reinforcement. This type of schedule tends to produce a steady rate of responding. Fixed ratio schedules deliver reinforcement after a fixed number of responses, while variable ratio schedules deliver reinforcement after varying numbers of responses. Fixed interval schedules deliver reinforcement after a fixed amount of time has elapsed since the last reinforcement.

An Individual Receives a Reinforcement for the First Response After