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Presaccadic attention enhances contrast sensitivity, but not at the upper vertical meridian

View ORCID ProfileNina M. Hanning, View ORCID ProfileMarc M. Himmelberg, View ORCID ProfileMarisa Carrasco
doi: https://doi.org/10.1101/2021.10.01.461760
Nina M. Hanning
1Department of Psychology, New York University, New York, NY, USA, 10003
2Center for Neural Sciences, New York University, New York, NY, USA, 10003
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  • For correspondence: hanning.nina@gmail.com
Marc M. Himmelberg
1Department of Psychology, New York University, New York, NY, USA, 10003
2Center for Neural Sciences, New York University, New York, NY, USA, 10003
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Marisa Carrasco
1Department of Psychology, New York University, New York, NY, USA, 10003
2Center for Neural Sciences, New York University, New York, NY, USA, 10003
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Abstract

Human visual performance is not only better at the fovea and decreases with eccentricity, but also has striking radial asymmetries around the visual field: At a fixed eccentricity, it is better along (1) the horizontal than vertical meridian and (2) the lower than upper vertical meridian. These asymmetries are not alleviated by covert exogenous or endogenous attention, but have been studied exclusively during eye fixation. However, a major driver of everyday attentional orienting is saccade preparation, during which visual attention automatically shifts to the future eye fixation. This presaccadic shift of attention is considered strong and compulsory, and relies on fundamentally different neural computations and substrates than covert attention. Given these differences, we investigated whether presaccadic attention can compensate for the ubiquitous performance asymmetries observed during eye fixation. Our data replicate polar performance asymmetries during fixation and document the same asymmetries during saccade preparation. Crucially, however, presaccadic attention enhanced contrast sensitivity at the horizontal and lower vertical meridian, but not at the upper vertical meridian. Thus, instead of attenuating polar performance asymmetries, presaccadic attention exacerbates them.

Competing Interest Statement

The authors have declared no competing interest.

Copyright 
The copyright holder for this preprint is the author/funder, who has granted bioRxiv a license to display the preprint in perpetuity. All rights reserved. No reuse allowed without permission.
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Posted December 04, 2021.
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Presaccadic attention enhances contrast sensitivity, but not at the upper vertical meridian
Nina M. Hanning, Marc M. Himmelberg, Marisa Carrasco
bioRxiv 2021.10.01.461760; doi: https://doi.org/10.1101/2021.10.01.461760
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Presaccadic attention enhances contrast sensitivity, but not at the upper vertical meridian
Nina M. Hanning, Marc M. Himmelberg, Marisa Carrasco
bioRxiv 2021.10.01.461760; doi: https://doi.org/10.1101/2021.10.01.461760

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