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Kiki Arkesteijn, Jeroen Smeets, Mieke Donk, Artem Belopolsky; Preserving the global effect across a saccade. Journal of Vision 2018;18(10):374. doi: 10.1167/18.10.374.
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© ARVO (1962-2015); The Authors (2016-present)
When a distractor is presented in close spatial proximity to a target, a saccade tends to land in between the two objects rather than on the target. This 'global effect' is thought to reflect unresolved competition between target and distractor. It is unclear whether the global effect persists across saccades since a saccade displaces the retinotopic representations of target and distractor. In the present study participants performed a sequence of a horizontal and a vertical saccade and the global effect was induced by presenting a distractor next to the second saccade target. This distractor was removed during the first saccade. On half of the trials, the second target also disappeared after the first saccade, resulting in a memory-guided second saccade. On these trials, the second saccade showed a global effect, despite the disappearance of the distractor after the first saccade. Without correction based on a visible target location, the global effect was stable over hundreds of milliseconds. This suggests that the biased saccade plan was remapped across the first saccade. However, when the second target remained present after the first saccade, the bias was corrected and the global effect was eliminated, even for saccades with the shortest intersaccadic intervals.
Meeting abstract presented at VSS 2018
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