Katrina Is Trying to Put a Dollar Bill into a Vending

Multiple Choice

Katrina is trying to put a dollar bill into a vending machine in her office. Sometimes the machine will take a dollar bill on the first try; other times it can take up to five or six tries before the dollar bill is finally accepted. In this example, inserting a dollar bill into the vending machine is reinforced on a(n) _____ reinforcement schedule.

A) continuous
B) noncontingent
C) intermittent
D) short-delay