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Evidence for Asymmetrical Hemispheric Priming Using Known and Unknown Warning Stimuli in Two Language-Trained Chimpanzees (Pan troglodytes )

In this article results are reported from 3 warning stimulus-printing experiments that assessed hemisphere-specific activation and lateralization in 2 language-trained chimpanzees ( Pan troglodytes ). Results from Experiment 1 indicated a right visual field advantage in priming for meaningful warnin...

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Bibliographic Details
Published in:Journal of experimental psychology. General 1991-03, Vol.120 (1), p.46-56
Main Authors: Hopkins, W. D, Morris, R. D, Savage-Rumbaugh, E. S
Format: Article
Language:English
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Summary:In this article results are reported from 3 warning stimulus-printing experiments that assessed hemisphere-specific activation and lateralization in 2 language-trained chimpanzees ( Pan troglodytes ). Results from Experiment 1 indicated a right visual field advantage in priming for meaningful warning stimuli presented in blocks of 36 trials. In Experiments 2 and 3, randomized presentations of meaningful, familiar, and meaningless stimuli resulted in right visual field advantages for meaningful warning stimuli. No visual half-field differences were found for familiar or meaningless warning stimuli. The findings are similar to those found in human subjects using known-unknown symbol paradigms; they suggest that basic phylogenetic neuropsychological systems related to activation and priming processes may link nonhuman primate and human studies of lateralization.
ISSN:0096-3445
1939-2222
DOI:10.1037/0096-3445.120.1.46