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Conscious and Non-conscious Representations of Emotional Faces in Asperger's Syndrome
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Do emotional faces modulate pupillary pseudoneglect?

Jingxiong Xu1, Kehan Ni1, Nicola E Burns1

  • 1Human Cognitive Neuroscience, University of Edinburgh, Edinburgh, UK.

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|June 26, 2026
PubMed
Summary
This summary is machine-generated.

This study investigated attentional bias using pupillometry and emotional faces. While pupillary pseudoneglect was observed, it did not correlate with other bias measures, suggesting task-specific effects.

Keywords:
Pseudoneglectchimeric face testline bisectionpupillometryspatial attention

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Area of Science:

  • Cognitive Neuroscience
  • Visual Attention
  • Pupillometry

Background:

  • Pseudoneglect, a leftward attentional bias, is typically measured behaviorally.
  • A split-screen pupillometric method offers an objective measure of pseudoneglect, but replication results have been mixed.
  • Emotional stimuli, particularly faces, are known to elicit strong lateralized biases.

Purpose of the Study:

  • To investigate whether emotional face processing amplifies pupillary pseudoneglect using split-screen pupillometry.
  • To examine the relationship between pupillary pseudoneglect and biases in emotional face judgments and line bisection.

Main Methods:

  • Fifty-three healthy participants completed a split-screen pupillometry task.
  • Stimuli included non-face objects and emotional chimeric faces.
  • Pupillary responses were recorded during stimulus presentation.
  • Participants also performed emotional face judgments and a line bisection task.

Main Results:

  • Pupillary pseudoneglect was observed for non-face stimuli (d = -0.36) and was numerically larger for emotional faces (d = -0.76), though this difference was not statistically significant.
  • A significant leftward bias was found in emotional face judgments (d = -0.76) and line bisection (d = -0.47).
  • Neither pupillary bias nor face judgment bias correlated with pupillary pseudoneglect.

Conclusions:

  • The split-screen pupillometric method is supported as a valid tool for measuring pseudoneglect.
  • Emotional face processing may influence pupillary pseudoneglect, but this effect requires further investigation.
  • Lateralized biases across different tasks show limited statistical association, supporting the notion of task-specific attentional biases.