with regard to free-operant conditioning, a form of interval reinforcement wherein such displayed for the first reaction following the passing of a variable period, since the prior reinforcement. Reinforcement doesn't rely on the amount of reactions during the intervals. The value of the schedule is rendered by the average interval length; "VI 3" indicates which the average length of the intervals between potential reinforcements is 3 minutes.

VARIABLE-INTERVAL REINFORCEMENT SCHEDULE (VI SCHEDULE): "The VI Schedule was once recognized as an aperiodic reinforcement schedule."
Cite this page: N., Pam M.S., "VARIABLE-INTERVAL REINFORCEMENT SCHEDULE (VI SCHEDULE)," in, April 29, 2013, (accessed June 16, 2019).