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PLoS One. 2014 Mar 4;9(3):e89339. doi: 10.1371/journal.pone.0089339. eCollection 2014.

The duration of uncertain times: audiovisual information about intervals is integrated in a statistically optimal fashion.

Author information

1
Multisensory Perception and Action Group, Max Planck Institute for Biological Cybernetics, Tübingen, Germany; Cognitive Neuroscience Department and Cognitive Interaction Technology-Center of Excellence, Bielefeld University, Bielefeld, Germany.
2
Multisensory Perception and Action Group, Max Planck Institute for Biological Cybernetics, Tübingen, Germany; Center for Computational Neuroscience and Cognitive Robotics and School of Psychology, University of Birmingham, Edgbaston, Birmingham, United Kingdom.
3
Multisensory Perception and Action Group, Max Planck Institute for Biological Cybernetics, Tübingen, Germany; Cognitive Neuroscience Department and Cognitive Interaction Technology-Center of Excellence, Bielefeld University, Bielefeld, Germany; Bernstein Center for Computational Neuroscience, Tübingen, Germany.

Erratum in

  • PLoS One. 2014;9(4):e96134.

Abstract

Often multisensory information is integrated in a statistically optimal fashion where each sensory source is weighted according to its precision. This integration scheme isstatistically optimal because it theoretically results in unbiased perceptual estimates with the highest precisionpossible.There is a current lack of consensus about how the nervous system processes multiple sensory cues to elapsed time.In order to shed light upon this, we adopt a computational approach to pinpoint the integration strategy underlying duration estimationof audio/visual stimuli. One of the assumptions of our computational approach is that the multisensory signals redundantly specify the same stimulus property. Our results clearly show that despite claims to the contrary, perceived duration is the result of an optimal weighting process, similar to that adopted for estimates of space. That is, participants weight the audio and visual information to arrive at the most precise, single duration estimate possible. The work also disentangles how different integration strategies - i.e. consideringthe time of onset/offset ofsignals - might alter the final estimate. As such we provide the first concrete evidence of an optimal integration strategy in human duration estimates.

PMID:
24594578
PMCID:
PMC3942383
DOI:
10.1371/journal.pone.0089339
[Indexed for MEDLINE]
Free PMC Article

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