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SAMPLE‐SPECIFIC RATIO EFFECTS IN MATCHING TO SAMPLE
Author(s) -
Paul Coleman
Publication year - 1983
Publication title -
journal of the experimental analysis of behavior
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.75
H-Index - 61
eISSN - 1938-3711
pISSN - 0022-5002
DOI - 10.1901/jeab.1983.39-77
Subject(s) - sample (material) , statistics , matching (statistics) , discriminative model , sample size determination , mathematics , psychology , pattern recognition (psychology) , artificial intelligence , computer science , chromatography , chemistry
In a symbolic matching‐to‐sample task, pigeons were trained using sample‐specific, fixed‐ratio “observing responses.” Subsequently, in a mixed condition, each sample was presented equally often with each ratio requirement, i.e., the ratios were no longer correlated with the samples. In a second experiment, pigeons were trained initially in the mixed condition and subsequently shifted to the sample‐specific condition in which the required ratios were correlated with the samples. Results of both experiments suggested joint control of choices by ratio value and by the exteroceptive stimuli. The discriminative properties of the ratios appeared to outweigh absolute ratio‐size effects.