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

Autor(en)
Hartcher O'Brien, Jessica ; Di Luca, Massimiliano ; Ernst, Marc O.
Normierter Zeitschriftentitel
PLOS ONE 
DOI
10.1371/journal.pone.0089339
PubMed-ID
24594578
URL
https://pub.uni-bielefeld.de/record/2649253
Web of Science-ID
000332475500013

Weitere Details

Sprache
englisch
Darstellungsform
Text
Band
9
Artikelnummer
e89339
Ausgabe
3
Schlagwörter
Audio-Visual , Bayesian Modeling , Duration , Maximum-Likelihood-Integration , Time perception

Often multisensory information is integrated in a statistically optimal fashion where each sensory source is weighted according to its precision. This integration scheme is statistically optimal because it theoretically results in unbiased perceptual estimates with the highest precision possible. 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 estimation of 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. considering the time
of onset/offset of signals - might alter the final estimate. As such we provide the first concrete evidence of an optimal integration strategy in human duration estimates.

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