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Multiple object individuation during numerical Stroop.

Silvia Pagano1, Veronica Mazza

  • 1Center for Mind/Brain Sciences (CIMeC), University of Trento, Trento, Italy. silvia.pagano@unitn.it

Psychophysiology
|January 16, 2013
PubMed
Summary
This summary is machine-generated.

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Multiple object individuation, a brain process for identifying individual items, appears to be a pre-numeric stage. This neural process does not retain semantic number information during early visual processing.

Area of Science:

  • Cognitive Neuroscience
  • Visual Perception
  • Numerical Cognition

Background:

  • Understanding how the brain processes multiple objects is crucial for cognitive science.
  • The relationship between object individuation and numerical processing remains unclear.

Purpose of the Study:

  • To investigate if semantic number information is retained during multiple object individuation.
  • To determine if the brain encodes number magnitude at the prenumeric individuation stage.

Main Methods:

  • Recorded the N2pc (a neural measure of selection/individuation) during a numerical Stroop task.
  • Participants enumerated varying numbers of target digits (1-4) that were either congruent or incongruent with their numerosity.

Main Results:

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  • N2pc amplitudes increased with target numerosity.
  • N2pc amplitudes were minimally affected by the congruency between digit identity and numerosity.

Conclusions:

  • Multiple object individuation is a prenumeric stage.
  • This neural stage does not encode the magnitude of the numerosity of the individuated objects.