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Space, time and number: common coding mechanisms and interactions between domains.

Deborah J Serrien1, Michiel M Spapé2

  • 1School of Psychology, University of Nottingham, Nottingham, UK. deborah.serrien@nottingham.ac.uk.

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Handedness influences how people process space and time, with left-handers showing better collision detection. This spatial skill predicts arithmetic ability in right-handers, highlighting handedness as a key factor in cross-domain information processing.

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Area of Science:

  • Cognitive neuroscience
  • Human behavior

Background:

  • Space, time, and number are fundamental dimensions of environmental perception and action.
  • These dimensions are interconnected in human behavior and neural processing.

Purpose of the Study:

  • To investigate the interdependencies between spatial, temporal, and numerical processing.
  • To explore the role of handedness in mediating these cross-domain interactions.

Main Methods:

  • Participants performed an object collision task (space-time processing) and arithmetic tests (number processing).
  • Handedness (left- vs. right-handed) was a key factor analyzed in relation to task performance.

Main Results:

  • Left-handers demonstrated superior accuracy in collision detection compared to right-handers.
  • Successful collision detection predicted arithmetic achievement, particularly in right-handed individuals.

Conclusions:

  • Handedness influences sensorimotor experiences and interhemispheric integration, affecting spatial processing.
  • Handedness acts as a mediator in integrating information across different cognitive domains, likely due to lateralized brain connectivity.