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Related Experiment Video

Updated: Mar 19, 2026

Exploring Infant Sensitivity to Visual Language using Eye Tracking and the Preferential Looking Paradigm
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Do infants have the horizontal bias?

D R Van Renswoude1, S P Johnson2, M E J Raijmakers3

  • 1Department of Psychology, University of Amsterdam, Nieuwe Achtergracht 129-B, 1018 WT Amsterdam, The Netherlands; Research Priority Area Yield, University of Amsterdam, The Netherlands; Amsterdam Brain and Cognition, University of Amsterdam, The Netherlands.

Infant Behavior & Development
|June 10, 2016
PubMed
Summary
This summary is machine-generated.

Infants, like adults, exhibit a horizontal eye movement bias when viewing scenes. This developmental finding suggests older infants show more precise saccade targeting than younger ones.

Keywords:
Horizontal biasInfant developmentInfant eye movementsSaccade directionsScene viewing

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Area of Science:

  • Developmental Psychology
  • Cognitive Neuroscience
  • Ophthalmology

Background:

  • Adults demonstrate a preference for horizontal saccades (eye movements) when observing real-world environments.
  • Understanding the development of visual attention and eye movement patterns in infants is crucial for cognitive development research.

Purpose of the Study:

  • To investigate whether infants exhibit a similar horizontal saccade bias as observed in adults.
  • To analyze the developmental trajectory of saccade precision in infants.

Main Methods:

  • Eye movement directions were recorded and analyzed for 41 infants and 47 adults viewing 28 real-world scenes.
  • Saccade directions were quantified using both binning methods and modeling with Von Mises distributions to capture variance.
  • Data analysis focused on the proportion of horizontal, vertical, and oblique saccades.

Main Results:

  • A significant horizontal saccade bias was confirmed in both adult and infant participants.
  • The study identified a developmental trend, with older infants demonstrating more accurate saccade targeting than younger infants.
  • Both analytical approaches (binning and Von Mises modeling) supported the presence of horizontal bias.

Conclusions:

  • Infants possess a horizontal saccade bias, mirroring adult visual scanning behavior.
  • This finding is significant for understanding infant visual exploration and should be considered in future research designs and analyses.
  • A developmental improvement in saccade precision is evident in infants as they mature.