Animal Learning & Behavior
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In a second-order schedule, fixed-interval components were reinforced according to a variable-interval schedule. A brief stimulus accompanied the completion of each fixed interval. Brief-stimulus duration was varied across conditions from 0.5 to 8 sec. Patterning was greater the longer the duration of the stimulus. Additionally, exposure to relatively long brief-stimulus durations enhanced patterning upon reexposure to shorter brief-stimulus durations.
Cohen, Steven L.; Hughes, Joan E.; and Stubbs, D. Alan, "Second-order schedules: Manipulation of brief-stimulus duration at component completion" (1973). Psychology Faculty Scholarship. 31.
Cohen, S.L., Hughes, J.E. & Stubbs, D.A. Second-order schedules: Manipulation of brief-stimulus duration at component completion. Animal Learning & Behavior 1, 121–124 (1973). https://doi.org/10.3758/BF03214576
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