Dropping coins in a soft-drink vending machine and receiving a drink is a ____ schedule of reinforcement.

A) intermittent
B) fixed interval
C) continuous
D) variable ratio

A continuous schedule of reinforcement delivers reinforcement every time the desired behavior occurs. In this case, every time a customer drops coins in the vending machine and selects a soft drink, they receive a drink. This is different from intermittent schedules of reinforcement, which only deliver reinforcement some of the time, and fixed interval or variable ratio schedules of reinforcement, which are based on time or number of responses, respectively.