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Differences in perceived durations between plausible biological and non-biological stimuli

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Abstract

Visual motion stimuli can sometimes distort our perception of time. This effect is dependent on the apparent speed of the moving stimulus, where faster stimuli are usually perceived lasting longer than slower stimuli. Although it has been shown that neural and cognitive processing of biological motion stimuli differ from non-biological motion stimuli, no study has yet investigated whether perceived durations of biological stimuli differ from non-biological stimuli across different speeds. Here, a prospective temporal reproduction task was used to assess that question. Biological motion stimuli consisted of a human silhouette running in place. Non-biological motion stimuli consisted of a rectangle moving in a pendular way. Amount and plausibility of movement for each stimulus and frame-rate (speed) were evaluated by an independent group of participants. Although the amount of movement perceived was positively correlated to frame rate both for biological and non-biological stimuli, movie clips involving biological motion stimuli were judged to last longer than non-biological motion stimuli only at frame rates for which movement was rated as plausible. These results suggest that plausible representations of biomechanical movement induce additional temporal distortions to those modulated by increases in stimulus speed. Moreover, most studies reporting neural and cognitive differences in the processing of biological and non-biological motion stimuli acquired neurophysiological data using fMRI. Here, we report differences in the processing of biological and non-biological motion stimuli across different speeds using functional near-infrared spectroscopy (fNIRS), a less costly and portable form of neurophysiological data acquisition.

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Acknowledgments

This study was funded by Universidade Federal do ABC (UFABC). The authors would like to thank Dr. Rodrigo Pavão, Dr. Francisco Nather, and the members of the Timing and Cognition Laboratory at UFABC (https://neuro.ufabc.edu.br/timing/) for useful discussions and suggestions on this study. MSC is a member of the Instituto Nacional de Ciência e Tecnologia sobre Comportamento, Cognição e Ensino, supported by the Brazilian National Research Council (CNPq, Grant # 465686/2014-1), the Coordination of Superior Level Staff Improvement (CAPES, Grant # 88887.136407/2017-00), and the São Paulo Research Foundation (FAPESP, Grant # 2014/50909-8).

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Correspondence to Giuliana Martinatti Giorjiani.

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Communicated by Francesca Frassinetti.

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Giorjiani, G.M., Biazoli, C.E. & Caetano, M.S. Differences in perceived durations between plausible biological and non-biological stimuli. Exp Brain Res 239, 161–173 (2021). https://doi.org/10.1007/s00221-020-05904-w

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  • DOI: https://doi.org/10.1007/s00221-020-05904-w

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