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Assessing Binocular Central Visual Field and Binocular Eye Movements in a Dichoptic Viewing Condition
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Numerosity Perception in Peripheral Vision.

Min Susan Li1, Clement Abbatecola1, Lucy S Petro1

  • 1Centre for Cognitive Neuroimaging, School of Psychology and Neuroscience, University of Glasgow, Glasgow, United Kingdom.

Frontiers in Human Neuroscience
|November 22, 2021
PubMed
Summary
This summary is machine-generated.

Peripheral vision uses gist processing to monitor the environment. This study shows that spatial context in peripheral vision is mandatory but task-dependent, influencing numerosity perception based on attention.

Keywords:
computational modellingnumerosity perceptionperipheral visionpsychophysicsspatial integration

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Area of Science:

  • Visual perception
  • Cognitive neuroscience
  • Human psychophysics

Background:

  • Peripheral vision prioritizes environmental monitoring over detailed processing.
  • Gist processing in the periphery aids in detecting behaviorally relevant changes.
  • Perceptual processing in the periphery involves a balance between bottom-up and top-down influences.

Purpose of the Study:

  • To investigate the interaction between bottom-up and top-down processing in peripheral vision.
  • To examine how spatial context influences numerosity perception in the periphery.
  • To determine the task-dependency of contextual influences in peripheral vision.

Main Methods:

  • Behavioral experiment using a peripheral numerosity discrimination task.
  • Manipulation of top-down attention (center vs. surround focus) and bottom-up signal strength (stimulus duration).
  • Comparison of results with an ideal-observer model.

Main Results:

  • Numerosity perception in target regions was influenced by irrelevant neighboring contextual information.
  • This contextual influence emerged early in stimulus presentation and persisted.
  • Distinct interaction patterns were observed when attention was directed to the center versus the surround.

Conclusions:

  • Spatial context in peripheral vision exerts a mandatory but task-dependent influence on perception.
  • Attention to the center results in a weighted combination of information, with surround leakage.
  • Attention to the surround involves occasional attentional switching between competing information streams.