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Articles, Behavioral/Systems/Cognitive

Multisensory Decision-Making in Rats and Humans

David Raposo, John P. Sheppard, Paul R. Schrater and Anne K. Churchland
Journal of Neuroscience 14 March 2012, 32 (11) 3726-3735; DOI: https://doi.org/10.1523/JNEUROSCI.4998-11.2012
David Raposo
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John P. Sheppard
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Paul R. Schrater
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Anne K. Churchland
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This article has a correction. Please see:

  • Erratum: Perez de Arce et al., Synaptic Clustering of PSD-95 Is Regulated by c-Abl through Tyrosine Phosphorylation - May 23, 2012

Abstract

We report a novel multisensory decision task designed to encourage subjects to combine information across both time and sensory modalities. We presented subjects, humans and rats, with multisensory event streams, consisting of a series of brief auditory and/or visual events. Subjects made judgments about whether the event rate of these streams was high or low. We have three main findings. First, we report that subjects can combine multisensory information over time to improve judgments about whether a fluctuating rate is high or low. Importantly, the improvement we observed was frequently close to, or better than, the statistically optimal prediction. Second, we found that subjects showed a clear multisensory enhancement both when the inputs in each modality were redundant and when they provided independent evidence about the rate. This latter finding suggests a model where event rates are estimated separately for each modality and fused at a later stage. Finally, because a similar multisensory enhancement was observed in both humans and rats, we conclude that the ability to optimally exploit sequentially presented multisensory information is not restricted to a particular species.

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The Journal of Neuroscience: 32 (11)
Journal of Neuroscience
Vol. 32, Issue 11
14 Mar 2012
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Multisensory Decision-Making in Rats and Humans
David Raposo, John P. Sheppard, Paul R. Schrater, Anne K. Churchland
Journal of Neuroscience 14 March 2012, 32 (11) 3726-3735; DOI: 10.1523/JNEUROSCI.4998-11.2012

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Multisensory Decision-Making in Rats and Humans
David Raposo, John P. Sheppard, Paul R. Schrater, Anne K. Churchland
Journal of Neuroscience 14 March 2012, 32 (11) 3726-3735; DOI: 10.1523/JNEUROSCI.4998-11.2012
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