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Generating Strictly Controlled Stimuli for Figure Recognition Experiments

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Published on: March 18, 2019

Statistical regularities reduce perceived numerosity.

Jiaying Zhao¹, Ru Qi Yu²

¹Department of Psychology, University of British Columbia, Canada; Institute for Resources, Environment and Sustainability, University of British Columbia, Canada.

|October 10, 2015

Summary

This summary is machine-generated.

Statistical regularities in object co-occurrences influence numerosity perception. Consistent color pairings in visual arrays reduce the perceived number of objects, suggesting an implicit grouping mechanism.

Keywords:

Attention Grouping Implicit learning Numerosity estimation Statistical learning

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Area of Science:

Cognitive psychology
Visual perception
Computational neuroscience

Background:

Numerosity perception is typically guided by explicit grouping cues.
The influence of statistical regularities on grouping and numerosity perception remains underexplored.

Purpose of the Study:

To investigate how statistical regularities of object co-occurrences affect numerosity perception without explicit grouping cues.
To determine if implicit statistical learning can lead to grouping and alter number perception.

Main Methods:

Participants estimated the number of colored circles in visual arrays.
Arrays were designed with varying degrees of color co-occurrence regularities.
Experiments included conditions with consistent color pairings and color duplicates to test grouping hypotheses.

Main Results:

Numerosity estimates were significantly lower in arrays with consistent color co-occurrences, even without explicit awareness of the pairings.
Introducing identical color duplicates further reduced perceived numerosity, supporting a grouping interpretation.
The observed underestimation was not attributable to increased attention to individual objects.

Conclusions:

Statistical regularities in object co-occurrences can implicitly group objects.
This implicit grouping mechanism leads to a reduction in perceived numerosity.
Perception of number is sensitive to learned statistical properties of the visual environment.