Harold catches fish throughout the day at unpredictable intervals. which reinforcement schedule is this? variable interval variable ratio fixed ratio fixed interval?

variable interval

Explanation:

In operant conditioning, a variable-interval schedule is defined as that schedule in which a response is received after unpredicted time , because reinforcement has been administered in diffrent non fixed times. The response is slow and steady. Variable means non fixed time which means reinforcement can occur at any time , using various different time zone. Interval refers to time hence this means reinforcement is administered at various times.

answer; positive reinforcement;