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ERIC Number: EJ872842
Record Type: Journal
Publication Date: 2010-Jan
Pages: 20
Abstractor: As Provided
ISSN: ISSN-0022-5002
A Runs-Test Algorithm: Contingent Reinforcement and Response Run Structures
Hachiga, Yosuke; Sakagami, Takayuki
Journal of the Experimental Analysis of Behavior, v93 n1 p61-80 Jan 2010
Four rats' choices between two levers were differentially reinforced using a runs-test algorithm. On each trial, a runs-test score was calculated based on the last 20 choices. In Experiment 1, the onset of stimulus lights cued when the runs score was smaller than criterion. Following cuing, the correct choice was occasionally reinforced with food, and the incorrect choice resulted in a blackout. Results indicated that this contingency reduced sequential dependencies among successive choice responses. With one exception, subjects' choice rule was well described as biased coin flipping. In Experiment 2, cuing was removed and the reinforcement criterion was changed to a percentile score based on the last 20 reinforced responses. The results replicated those of Experiment 1 in successfully eliminating first-order dependencies in all subjects. For 2 subjects, choice allocation was approximately consistent with nonbiased coin flipping. These results suggest that sequential dependencies may be a function of reinforcement contingency. (Contains 10 figures.)
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Publication Type: Journal Articles; Reports - Research
Education Level: N/A
Audience: N/A
Language: English
Sponsor: N/A
Authoring Institution: N/A