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Looking up improves performance in verbal tasks.

Christophe Carlei1, Dirk Kerzel1

  • 1Faculté de Psychologie et des Sciences de l'Éducation, Université de Genève, Genève, Switzerland.

Laterality
|July 26, 2019
PubMed
Summary
This summary is machine-generated.

Gaze direction impacts cognitive tasks. Looking upwards, not left or right, improved verbal processing speed in a recent study, contrary to initial hypotheses.

Keywords:
Hemispheric asymmetriesgaze directionshort-term memoryunilateral gazeverbal memory

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Area of Science:

  • Cognitive Neuroscience
  • Experimental Psychology

Background:

  • Gaze direction influences cognitive processing, potentially by activating specific cerebral hemispheres.
  • Previous research indicated leftward gaze benefits visuo-spatial memory, linked to memory's lateralization.
  • The current study explores unilateral gaze effects on verbal processing, considering language lateralization and visual field advantages.

Purpose of the Study:

  • To investigate the impact of unilateral gaze direction (left, right, up, down) on verbal processing tasks.
  • To test the hypothesis that rightward gaze enhances verbal processing due to left-hemisphere language lateralization.
  • To examine if upward gaze improves verbal processing, as the upper visual field may facilitate local processing.

Main Methods:

  • Participants performed lexical decision, grammatical gender, and semantic discrimination tasks.
  • Gaze direction was directed to specific screen corners (left, right, upper, lower).
  • Reaction times (RTs) were measured to assess performance differences.

Main Results:

  • No significant performance differences were found between leftward and rightward gaze directions for verbal tasks.
  • Reaction times were significantly shorter when participants looked upwards compared to downwards.
  • These findings align with inconsistent literature on horizontal gaze asymmetries in verbal tasks.

Conclusions:

  • Upward gaze direction appears to enhance verbal processing speed.
  • Horizontal gaze direction does not consistently affect verbal processing performance.
  • The study highlights the influence of vertical gaze direction on cognitive functions related to language.