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Audiovisual detection at different intensities and delays

View ORCID ProfileChandramouli Chandrasekaran, View ORCID ProfileMatthias Gondan
doi: https://doi.org/10.1101/173773
Chandramouli Chandrasekaran
1Neuroscience Institute & Department of Psychology, Princeton University, USA
2Department of Electrical Engineering, Stanford University, USA
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Matthias Gondan
3Department of Psychology, University of Copenhagen, Denmark
4Faculty for Psychology, University of Vienna, Austria
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Abstract

In divided-attention tasks with two classes of target stimuli (e.g., auditory and visual), redundancy gains are typically observed if both targets are presented simultaneously, as compared with single-target presentation. Different models explain such redundant-signals effects, including race and coactivation models. Here we generalize one such coactivation model, the superposition model, and show that restricting this evidence accumulation process to a limited time interval, that is a temporal deadline, provides the model the ability to describe the detection behavior of two monkeys across a wide range of intensities and stimulus onset asynchronies. We present closed-form solutions for the mean absorption times and probabilities for the two-stage diffusion process with drift towards a single barrier in the presence of a temporal deadline.

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Posted September 05, 2017.
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Audiovisual detection at different intensities and delays
Chandramouli Chandrasekaran, Matthias Gondan
bioRxiv 173773; doi: https://doi.org/10.1101/173773
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Audiovisual detection at different intensities and delays
Chandramouli Chandrasekaran, Matthias Gondan
bioRxiv 173773; doi: https://doi.org/10.1101/173773

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