A type of compound schedule of reinforcement that includes the combination of two or more basic schedules of reinforcement (FI,FR,VI,VR) for two or more behaviors and the schedules are occurring at the same time. Each schedule has an clear SD (discriminative stimulus) associated with it. This allows the learner to choose which schedule of reinforcement they want to allot their responses to. This schedule is associated with matching law. People tend to choose the schedule that has the most, easiest to access, best type of reinforcement available.