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Multisensory temporal integration: task and stimulus dependencies

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Abstract

The ability of human sensory systems to integrate information across the different modalities provides a wide range of behavioral and perceptual benefits. This integration process is dependent upon the temporal relationship of the different sensory signals, with stimuli occurring close together in time typically resulting in the largest behavior changes. The range of temporal intervals over which such benefits are seen is typically referred to as the temporal binding window (TBW). Given the importance of temporal factors in multisensory integration under both normal and atypical circumstances such as autism and dyslexia, the TBW has been measured with a variety of experimental protocols that differ according to criterion, task, and stimulus type, making comparisons across experiments difficult. In the current study, we attempt to elucidate the role that these various factors play in the measurement of this important construct. The results show a strong effect of stimulus type, with the TBW assessed with speech stimuli being both larger and more symmetrical than that seen using simple and complex non-speech stimuli. These effects are robust across task and statistical criteria and are highly consistent within individuals, suggesting substantial overlap in the neural and cognitive operations that govern multisensory temporal processes.

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Acknowledgments

This research was funded in part through a grant from NIDCD awarded to Mark Wallace and Stephen Camarata, NIH # R34 DC010927, as well as an NIDCD grant awarded to Ryan Stevenson, NIH 1F32 DC011993. We also acknowledge the help of Raquel Zemtsov, Juliane Kreuger Fister, and Justin Siemann with assistance running subjects, Zachary Barnett for technical assistance, and Lena Quinto for the speech stimuli.

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Correspondence to Ryan A. Stevenson.

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Stevenson, R.A., Wallace, M.T. Multisensory temporal integration: task and stimulus dependencies. Exp Brain Res 227, 249–261 (2013). https://doi.org/10.1007/s00221-013-3507-3

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  • DOI: https://doi.org/10.1007/s00221-013-3507-3

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