Variable Interval

Definition

A variable interval is a schedule of reinforcement where a response is rewarded after an unpredictable amount of time has passed.

Imagine fishing in a lake. You never know exactly when you'll catch something - it could be five minutes from now or half an hour later.

Variable Ratio Schedule: In this type, reinforcement comes after an unpredictable number of responses have been made by the subject.

Fixed Ratio Schedule: Here, reinforcement occurs after every nth (fixed) number of responses by the subject.

Random Reinforcement: This involves providing reinforcement at random intervals, making prediction impossible.

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