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Spatial frequency equalization does not prevent spatial-numerical associations.

Andrea Adriano1, Luca Rinaldi2,3, Luisa Girelli4,5

  • 1Dipartimento di Psicologia, Università degli Studi di Milano-Bicocca, Piazza dell'Ateneo Nuovo 1, Edificio U6, 20126, Milano, Italy. andrea.adriano@hotmail.com.

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Summary
This summary is machine-generated.

Spatial-numerical associations (SNAs) are not solely based on spatial frequency (SF) coding. This study demonstrates that SNAs persist even when SF cues are controlled, suggesting other mechanisms are at play.

Keywords:
Hemispheric asymmetriesNumerical processingSpatial frequencySpatial–numerical association

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Area of Science:

  • Cognitive Neuroscience
  • Visual Perception
  • Numerical Cognition

Background:

  • Spatial-numerical associations (SNAs) link small numbers to the left and large numbers to the right.
  • Debate exists whether SNAs are innate or arise from spatial frequency (SF) coding.
  • SF coding theory suggests hemispheric tuning to different SF ranges influences SNA.

Purpose of the Study:

  • To investigate the role of spatial frequency (SF) in the origin of spatial-numerical associations (SNAs).
  • To determine if SF power spectrum alone can account for SNAs.
  • To test the hypothesis that asymmetric SF tuning in brain hemispheres causes SNAs.

Main Methods:

  • Participants performed a dot-array comparison task.
  • Experiment 1: SF confounded with numerosity.
  • Experiment 2: SF power spectrum equalized across stimuli to isolate numerosity effects.

Main Results:

  • SNAs were observed in both experiments, regardless of SF confounding.
  • The emergence of SNAs was independent of whether SF was a confouned or unconfounded cue.
  • Results indicate SNAs are not solely driven by SF power spectrum differences.

Conclusions:

  • Spatial-numerical associations (SNAs) cannot be explained by spatial frequency (SF) power spectrum alone.
  • The findings rule out asymmetric SF tuning in brain hemispheres as the primary cause of SNAs.
  • Alternative explanations for the origin of SNAs need to be explored.