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Repulsive Serial Effects in Visual Numerosity Judgments.

Matteo Valsecchi1, Natale Stucchi2, Lisa Scocchia2

  • 1Abteilung Allgemeine Psychologie, Justus-Liebig-Universität Giessen, Giessen, Germany.

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Summary
This summary is machine-generated.

Previous visual stimuli influence current numerosity perception. High numerosity stimuli cause underestimation of subsequent stimuli, and low numerosity stimuli cause overestimation, regardless of memory.

Keywords:
adaptationnumerositysequential effectsvisual working memory

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Area of Science:

  • Cognitive Psychology
  • Visual Perception
  • Psychophysics

Background:

  • Perceived numerosity is crucial for understanding visual scenes.
  • Interactions between sequential visual stimuli can influence perception.
  • The role of visual working memory in numerosity estimation is not fully understood.

Purpose of the Study:

  • To investigate how prior ensemble numerosity affects current numerosity perception.
  • To determine if this effect differs based on visual working memory storage.
  • To explore analogies between numerosity perception and other visual dimension perception.

Main Methods:

  • Participants estimated the numerosity of visual element ensembles.
  • The numerosity of a preceding ensemble was varied.
  • The preceding ensemble was either held in visual working memory or not.

Main Results:

  • A repulsive effect was observed: prior high numerosity led to underestimation of the current stimulus.
  • Prior low numerosity led to overestimation of the current stimulus.
  • This repulsive effect persisted whether the first stimulus was memorized or not.

Conclusions:

  • Prior visual numerosity exerts a repulsive influence on subsequent numerosity judgments.
  • This effect is independent of whether the initial stimulus is actively maintained in visual working memory.
  • Numerosity estimation processes share similarities with the perception of other visual attributes like orientation.