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Duration perception in peripheral vision: Underestimation increases with greater stimuli eccentricity.

Xinle Bao1, Zhengyin Gu1, Jinxing Yang1

  • 1Department of Psychology, Zhejiang Sci-Tech University, Zhejiang, 310018, Hangzhou, China.

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Peripheral vision distorts duration perception, with longer durations underestimated as visual stimuli move further from the retina's center. This underestimation effect increases with eccentricity.

Keywords:
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Area of Science:

  • Visual perception
  • Psychophysics
  • Neuroscience

Background:

  • Duration perception is crucial for daily visual tasks but is susceptible to distortion.
  • Research on duration perception has primarily focused on central vision, with peripheral vision being less explored.
  • Eccentricity, a measure of retinal location, is known to influence visual processing.

Purpose of the Study:

  • To investigate how retinal location (eccentricity) affects duration perception in peripheral vision.
  • To quantify the influence of eccentricity on the Point of Subjective Equality (PSE) and Weber Fraction (WF).
  • To examine the impact of a central fixation task on duration perception in peripheral vision.

Main Methods:

  • Two psychophysical experiments were conducted using stimuli at various eccentricities (30° to 70°).
  • Experiment 1 measured duration perception (PSE and WF) without a central task.
  • Experiment 2 assessed the influence of a central task on duration perception at 50° eccentricity.

Main Results:

  • Retinal location significantly influenced the Point of Subjective Equality (PSE), indicating duration underestimation that increased with eccentricity.
  • The Weber Fraction (WF), representing sensitivity, was not significantly affected by eccentricity in Experiment 1.
  • A central task in Experiment 2 did not alter duration underestimation (PSE) but affected sensitivity (WF) at 50° eccentricity.

Conclusions:

  • Eccentricity exerts a compressive effect on duration perception in peripheral vision, leading to increased underestimation of subjective duration.
  • This underestimation effect expands with greater retinal eccentricity.
  • Findings offer new insights into peripheral visual processing and potential survival advantages of duration underestimation.