ABSTRACT
There are single-response and multiple-response concurrent schedules. In single-response concurrent schedules, also called conjoint schedules, two or more schedules are programmed on the same operandum. Thus, for example, on single-response concurrent FR 25 FI 1 minute (or conjoint FR 25 FI 1 minute) schedules, reinforcement would occur after every 25th re sponse and after eveiy response occurring at least one minute following the previous response reinforced on the FI 1-minute schedule.
