GATE 2021 XH5 – Question 36
A person or animal receives reinforcement after varying amounts of time under which schedule?
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Correct answer: (A) Variable interval
Explanation
An interval schedule makes reinforcement available after time has elapsed; varying those intervals gives a variable-interval schedule, A. Ratio schedules depend on response counts, and a fixed-interval schedule uses a constant time. Strictly, reinforcement follows the first eligible response after the varying interval.