The winning numbers in the local lottery are announced every wednesday, right after the local news broadcast. based on what is known about schedules of reinforcement, you should conclude that people who are listening for the lottery numbers will have their listening reinforced based on a:

The answer is that "it is reinforced based on a fixed-interval schedule".

A Fixed Interval Schedule gives a reward at reliable circumstances. For example a kid might be rewarded once per week if their room is tidied up. A problem with this sort of fortification timetable is that people tend to hold up until the point that the time when support will happen and then begin their reactions. Due to this reinforcement, yield doesn't stay steady.  For example, Educator plans exams or undertakings at general interims and the grade is the reinforced, yet the work is inconsistent during the interim between tests.