Effects of the presence and absence of stimuli correlated with different probabilities of reinforcement and with extinction in temporarily-defined schedules

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Emilio RIBES
CARLOS TORRES
ALFREDO MAYORAL

Abstract

Two experiments were conducted to evaluate the effects of two stimuli differentially correlated with various probabilities of water delivery and extinction in a temporally defined schedule. In both experiments a 60-sec temporal schedule was used, with tD and t∆ being 30 sec long. In to probability of water delivery varied from 1.0, to 0.75. 0.5 and 1.0, while in t∆ probability of water delivery was always 0.0. In Experiment 1, tD was correlated with a green light and t∆ with a white light. In Experiment 2 no stimuli were presented. Each of the three first experimental phases was followed by five consecutive probe sessions using the same probability value in tD. In probe sessions water was delivered non-contingent to responding. In both experiments response frequency was larger in tD to than in t∆ during the experimental phases, observing the opposite effect during probe sessions. In Experiment 2 the percentage of lost water-deliveries, the variability of both response frequency and the interval between water deliveries were larger than in Experiment

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How to Cite
RIBES, E., TORRES, C., & MAYORAL, A. (2011). Effects of the presence and absence of stimuli correlated with different probabilities of reinforcement and with extinction in temporarily-defined schedules. Mexican Journal of Behavior Analysis, 26(3), 327–354. https://doi.org/10.5514/rmac.v26.i3.23500