PREFERENCE IN CONCURRENT VARIABLE‐INTERVAL FIXED‐RATIO SCHEDULES
作者:
Michael Davison,
期刊:
Journal of the Experimental Analysis of Behavior
(WILEY Available online 1982)
卷期:
Volume 37,
issue 1
页码: 81-96
ISSN:0022-5002
年代: 1982
DOI:10.1901/jeab.1982.37-81
出版商: Blackwell Publishing Ltd
关键词: concurrent schedules;variable‐interval schedules;fixed‐ratio schedules;response allocation;time allocation;pecking;pigeons
数据来源: WILEY
摘要:
Five pigeons were trained on concurrent variable‐interval fixed‐ratio schedules in three experiments. Experiment 1 used two variable‐interval schedules and one fixed‐ratio schedule, and the ratio requirement was varied. Using the generalized matching law, sensitivity to reinforcement was close to 1.0, but performance was biased toward the variable‐interval schedule with the lower reinforcement rate. In Experiment 2, which used one variable‐interval and one fixed‐ratio schedule, the interval schedule was varied. All birds showed sensitivities to reinforcement of less than 1.0 and of less than the values obtained in Experiment 1. The performance was also biased toward the fixed‐ratio schedule. Because the generalized matching law could not account for the differences in the data from Experiments 1 and 2, an extension of this law was suggested and successfully tested in Experiment 3. The proposed dual‐sensitivity model was also shown to clarify some previously
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