Toy painters on Mattel's assembly line in China are paid by the hour,regardless of the number of toys they have painted.These workers are being reinforced according to a ____ schedule of reinforcement.

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

The workers are being reinforced on a fixed interval schedule, meaning they receive reinforcement (in this case, pay) after a set time period, regardless of how many toys they have painted during that time. This is different from a fixed ratio schedule, where reinforcement is given after a certain number of responses. It is also different from a variable interval schedule, where the time between reinforcements varies. A continuous interval schedule would require constant monitoring and reinforcement, which is not practical in this setting.