Answer:
True she is using variable interval schedule
Explanation:
Variable interval schedule is a way to condition the operator by reinforcement after a given period of time ( the time of reinforcement is not fixed). The reinforcement time is on a changing and variable schedule.
In this instance assembly line manager Ched on the employees between 10 and 11 a.m, and the next day she checked on them in the last 15 minutes of the shift.
