Molly's mail carrier delivers the mail promptly at noon each day. Molly never checks her mailbox in the morning, but always checks it at 12:05 p.m. Molly's mail checking is maintained on which schedule?

Question

Quizplus · Accepted Answer

Molly's behavior of checking her mailbox is maintained on a fixed interval schedule because she checks her mailbox at a consistent time - 12:05 p.m. - after a fixed period of time has elapsed (i.e., after the mail carrier has delivered the mail at noon). This behavior is not reinforced by the amount of mail she receives or by any random amount of time passing between mail deliveries, which would indicate a variable interval or variable ratio schedule, respectively. Moreover, there is no indication that Molly checks her mailbox after checking it a certain number of times, which would suggest a fixed ratio schedule.

Molly's Mail Carrier Delivers the Mail Promptly at Noon Each