Activity in perceptual classification networks as a basis for human subjective time perception

Warrick Roseboom (), Zafeirios Fountas, Kyriacos Nikiforou, David Bhowmik, Murray Shanahan and Anil K. Seth
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Warrick Roseboom: University of Sussex
Zafeirios Fountas: Imperial College London
Kyriacos Nikiforou: Imperial College London
David Bhowmik: Imperial College London
Murray Shanahan: Imperial College London
Anil K. Seth: University of Sussex

Nature Communications, 2019, vol. 10, issue 1, 1-9

Abstract: Abstract Despite being a fundamental dimension of experience, how the human brain generates the perception of time remains unknown. Here, we provide a novel explanation for how human time perception might be accomplished, based on non-temporal perceptual classification processes. To demonstrate this proposal, we build an artificial neural system centred on a feed-forward image classification network, functionally similar to human visual processing. In this system, input videos of natural scenes drive changes in network activation, and accumulation of salient changes in activation are used to estimate duration. Estimates produced by this system match human reports made about the same videos, replicating key qualitative biases, including differentiating between scenes of walking around a busy city or sitting in a cafe or office. Our approach provides a working model of duration perception from stimulus to estimation and presents a new direction for examining the foundations of this central aspect of human experience.

Date: 2019
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DOI: 10.1038/s41467-018-08194-7

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