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Numerosity perception is tuned to salient environmental features.

Paolo Antonino Grasso1, Giovanni Anobile1, Roberto Arrighi1

  • 1Department of Neuroscience, Psychology, Pharmacology and Child Health, University of Florence, Via di San Salvi 12, Padiglione 26, 50135 Florence, Italy.

Iscience
|April 11, 2022
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Summary
This summary is machine-generated.

Numerosity perception adapts to specific attributes like color and pitch. When stimuli share these features, perceived numerosity is underestimated, indicating selective environmental tuning.

Keywords:
Behavioral neuroscienceNeuroscienceSensory neuroscience

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Area of Science:

  • Cognitive psychology
  • Visual perception
  • Auditory perception

Background:

  • Numerosity perception guides behavior.
  • Current models suggest abstract number representations, independent of stimulus attributes.
  • This implies limited environmental tuning of numerosity systems.

Purpose of the Study:

  • Investigate if numerosity perception adapts to all items or subsets segregated by attributes.
  • Examine the role of salient attributes like color and pitch in numerosity adaptation.

Main Methods:

  • Participants adapted to numerous stimuli with matched or different colors.
  • Perceived numerosity was measured for test stimuli.
  • Acoustic adaptation was tested using pitch differences.

Main Results:

  • Matched colors led to a 25% underestimation of numerosity.
  • Different colors had minimal effect on perceived numerosity.
  • Pitch differences in the acoustic domain halved adaptation magnitude.

Conclusions:

  • Numerosity perception is selectively tuned to salient environmental attributes.
  • The system adapts to subsets of stimuli based on features like color and pitch.
  • This challenges models of abstract, attribute-independent numerosity representation.