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In pursuit of visual attention: SSVEP frequency-tagging moving targets.

de Lissa, P., Caldara, R., Nicholls, V. and Miellet, S., 2020. In pursuit of visual attention: SSVEP frequency-tagging moving targets. PLoS One, 15 (8), e0236967.

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DOI: 10.1371/journal.pone.0236967

Abstract

Previous research has shown that visual attention does not always exactly follow gaze direction, leading to the concepts of overt and covert attention. However, it is not yet clear how such covert shifts of visual attention to peripheral regions impact the processing of the targets we directly foveate as they move in our visual field. The current study utilised the co-registration of eye-position and EEG recordings while participants tracked moving targets that were embedded with a 30 Hz frequency tag in a Steady State Visually Evoked Potentials (SSVEP) paradigm. When the task required attention to be divided between the moving target (overt attention) and a peripheral region where a second target might appear (covert attention), the SSVEPs elicited by the tracked target at the 30 Hz frequency band were significantly, but transiently, lower than when participants did not have to covertly monitor for a second target. Our findings suggest that neural responses of overt attention are only briefly reduced when attention is divided between covert and overt areas. This neural evidence is in line with theoretical accounts describing attention as a pool of finite resources, such as the perceptual load theory. Altogether, these results have practical implications for many real-world situations where covert shifts of attention may discretely reduce visual processing of objects even when they are directly being tracked with the eyes.

Item Type:Article
ISSN:1932-6203
Additional Information:Data Availability: The datasets generated and used for this manuscript are publicly available in the OSF repository, the doi is: 10.17605/OSF.IO/C5TUA. Funding: This work was supported with funding from the Swiss National Science Foundation (100019_156541) to SM & RC. www.snf.ch The funder had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.
Group:Faculty of Science & Technology
ID Code:34421
Deposited By: Unnamed user with email symplectic@symplectic
Deposited On:10 Aug 2020 12:30
Last Modified:10 Aug 2020 12:30

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