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Depth Perception and Spatial Vision01:15

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Related Experiment Video

Updated: Jun 15, 2026

The (Spatial) Memory Game: Testing the Relationship Between Spatial Language, Object Knowledge, and Spatial Cognition
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Spatial cues affect mental number line bisections.

Michael E R Nicholls1, Alissandra M McIlroy

  • 1Department of Psychology, University of Melbourne, Parkville, VIC, Australia. mike.nicholls@unimelb.edu.au

Experimental Psychology
|February 25, 2010
PubMed
Summary
This summary is machine-generated.

Spatial cues can correct distortions in the mental number line (MNL) caused by pseudoneglect. Right-sided cues eliminated the overestimation of the leftward MNL, demonstrating attention

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Area of Science:

  • Cognitive Psychology
  • Neuroscience
  • Spatial Cognition

Background:

  • The mental number line (MNL) represents numerical magnitude spatially, typically coded from left to right.
  • Pseudoneglect is an attentional bias towards the left side, causing an overestimation of the leftward MNL.
  • Understanding factors influencing MNL distortions is crucial for cognitive and neuroscience research.

Purpose of the Study:

  • To investigate if spatial cues can correct the attentional bias affecting the mental number line (MNL).
  • To determine the impact of left, right, and bilateral spatial cues on pseudoneglect.
  • To explore the neural mechanisms linking physical and representational spatial attention.

Main Methods:

  • Seventeen participants performed forced-choice numerical length discriminations.
  • Spatial cues were presented to the left, right, or both sides during the task.
  • The effect of cueing on the overestimation of the leftward MNL was analyzed.

Main Results:

  • Participants consistently overestimated the leftward length of the MNL, confirming pseudoneglect.
  • This bias was observed with left and neutral spatial cues.
  • Right-sided spatial cues successfully eliminated the pseudoneglect bias.

Conclusions:

  • Spatial attention in physical space can modulate high-level mental representations like the MNL.
  • Right-sided attentional cues effectively counteract the leftward bias of pseudoneglect.
  • The findings suggest overlapping neural circuits for physical and representational spatial attention.