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. 2023 Feb 2;17:1058340. doi: 10.3389/fnins.2023.1058340

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Copyright © 2023 Dowiasch, Blanke, Knöll and Bremmer.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Localization during fixation. Flash position is plotted on the abscissa, localization error on the ordinate, defined as perceived minus presented flash position. Positive error values indicate that the PFP was to the right of the flash; negative error values indicate a perceptual shift to the left. Accordingly, a centripetal bias of flash localization is indicated by positive error values for stimuli presented in the left visual field and negative values for stimuli presented in the right visual fields. Likewise, a centrifugal bias is characterized by negative error values for stimuli in the left visual field and positive error values for stimuli in the right visual field. Conditions are color-coded: results for the continuous target presentation are depicted in blue and those for the gap condition in red. Different symbols indicate data from different subjects. Localization results during fixation were quite different across participants. Data are grouped for illustration purposes. Two subjects exhibited a centripetal bias (A) three subjects showed a centrifugal bias (B) and three subjects exhibited differences in localization in the left and right hemifield (C). Within subjects, differences in localization between pursuit conditions (continuous vs. gap) were not significant, except for one subject for one single target location (+4°) (C).