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Enhanced visual dominance in far space

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Abstract

The Colavita effect refers to the phenomenon that people do not respond to an auditory stimulus in most cases when a visual stimulus is simultaneously presented. Although the Colavita effect remains robust irrespective of many factors, little is known concerning how the visual dominance varies as a function of the depth of sensory inputs. In the present study, visual and auditory stimuli were presented either in the same (in Experiment 1) or in the different spatial distances (in Experiment 2). Participants were asked to make speeded responses to unimodal auditory, unimodal visual, or bimodal audiovisual stimuli. In the incorrectly responded bimodal trials, the error trials in which responses were made only to the visual component were compared with the trials in which responses were made only to the auditory component. In the correctly responded bimodal trials, the trials in which participants responded first to the visual component were compared with the trials in which participants responded first to the auditory component. Analysis on the incorrect and correct bimodal trials both indicated significant visual dominance effects. More importantly, the size of the visual dominance effect was significantly enhanced as long as the visual stimuli were presented in far space irrespective of whether the auditory stimuli were presented in near or far space. Our results thus, for the first time, revealed that the visual dominance effect changed along the depth dimension of space. Taken together, the present results shed lights on how the allocation of attentional resources along the depth dimension of space biases the process of multisensory competition.

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Acknowledgments

The work was funded by Grants from Natural Science Foundation of China (31371127, 31470978, 31100739) and Grants from the Ministry of Education of China (10YJCXLX055). Q.C. is supported by the Program for New Century Excellent Talents in the University of China (NCET-12-0645) and by the Guangdong Province Universities and Colleges Pearl River Scholar Funded Scheme (2014).

Conflict of interest

The authors declare that they have no conflict of interest.

Human and animal rights

All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.

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Informed consent was obtained from all individual participants included in the study.

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Correspondence to Qi Chen.

Additional information

Zhenzhu Yue and Yizhou Jiang have contributed equally to the present study.

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Yue, Z., Jiang, Y., Li, Y. et al. Enhanced visual dominance in far space. Exp Brain Res 233, 2833–2843 (2015). https://doi.org/10.1007/s00221-015-4353-2

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  • DOI: https://doi.org/10.1007/s00221-015-4353-2

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