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Bosco S. Tjan, Ewen Chao and Lynne E. Bernstein A visual or tactile signal makes auditory speech detection more efficient by reducing uncertainty European Journal of Neuroscience 39

Article first published online: 9 JAN 2014 | DOI: 10.1111/ejn.12471

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When acoustic speech is buried in noise, a task-irrelevant visual and/or vibrotactile stimulus can enhance its detectability. Within an ideal observer model, enhancement is attributable to reduced noise intrinsic to the perceptual system and/or improved statistical sampling efficiency. Experiments here support only improved efficiency via uncertainty reduction and offer no evidence for change in internal noise. This pattern of results argues against enhancement due to multisensory integration.

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