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Related Experiment Video

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Investigating the Deployment of Visual Attention Before Accurate and Averaging Saccades via Eye Tracking and Assessment of Visual Sensitivity
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Moving your head reduces perisaccadic compression.

Maria Matziridi1, Eli Brenner2, Jeroen B J Smeets3

  • 1Department of Psychology, Justus Liebig University, Giessen, GermanyyMaria.Matziridi@psychol.uni-giessen.de; http://www.uni-marburg.de/fb04/team-schuboe/team/matziridi.

Journal of Vision
|October 30, 2016
PubMed
Summary
This summary is machine-generated.

Moving the head during gaze shifts reduces the mislocalization of visual stimuli presented during saccades. This head movement decreases perceived position compression by lowering uncertainty about gaze position.

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Area of Science:

  • Neuroscience
  • Visual Perception
  • Oculomotor Research

Background:

  • Perisaccadic compression describes the phenomenon where visual stimuli near saccades are perceived closer to the saccade endpoint.
  • This compression effect typically increases with saccade amplitude in head-restrained conditions.

Purpose of the Study:

  • To investigate whether head movement, as part of a gaze shift, influences perisaccadic compression.
  • To determine if reducing eye-in-head rotation via head movement lessens the compression of perceived positions.

Main Methods:

  • Participants performed gaze shifts between two targets under two conditions: head static and head participating in the gaze shift.
  • Visual stimuli (flashed bars) were presented around saccade onset for localization tasks.

Main Results:

  • When the head contributed to the gaze shift, saccade duration was shorter.
  • Perisaccadic compression was reduced when head movement assisted the gaze shift.

Conclusions:

  • Head movement during gaze shifts can reduce perisaccadic compression.
  • This reduction is likely due to decreased uncertainty in gaze position at the time of visual stimulus presentation.