If a Rat Is on a VI-20-Second Schedule for Bar-Pressing

Multiple Choice

If a rat is on a VI-20-second schedule for bar-pressing, the rat will be reinforced

A) continuously for 20 seconds and then will receive no more reinforcement.
B) for every 20 seconds of continual responding.
C) for each bar press that occurs exactly 20 seconds after the last reinforced response.
D) for the first bar press that occurs after a random time interval that averages 20 seconds in length.