Problem: Summarize in a few simple sentences: Work on schedules of reinforcement is all but impossible without automatic programming of the contingencies of reinforcement. A large number of events need to be arranged during long experimental sessions. More than a million responses per month are often recorded from a single subject, with daily experimental sessions ranging up to 15 hours. In such cases manual programming is unthinkable. Moreover, the reaction time and variability of the human operator introduce errors in programming which defeat the purpose of such research. The required level of precision can be achieved only through the use of mechanical or electrical devices. With automatic programming a single experimenter can run a large number of experiments concurrently and almost continuously. Long experimental sessions may extend through the night without the presence of laboratory personnel. Relatively unskilled personnel can start and stop particular experiments, while the experimenter's time is free for the design of new equipment and experiments and the treatment and evaluation of results. Typical circuit. In the present experiment, programming of contingencies is carried out largely by various types of relays and electric and electronic timing and counting devices. Figure 4 shows a circuit containing many commonly occurring elements. This circuit is designed to program and record a fixed-interval schedule of reinforcement. Need Assignment Help?