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Is size perception based on monocular distance cues computed automatically?

Liat Goldfarb1, Joseph Tzelgov

  • 1Department of Behavioral Sciences, P.O. Box 653, Ben-Gurion University of the Negev, Beer Sheva, Israel 84105. liatgol@bgumail.bgu.ac.il

Psychonomic Bulletin & Review
|February 2, 2006
PubMed
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Size perception from monocular distance cues is automatic. When perceived size conflicted with numerical value, participants made more errors and took longer to decide, supporting automatic visual processing.

Area of Science:

  • Visual perception
  • Cognitive psychology
  • Neuroscience

Background:

  • Monocular distance cues influence size perception.
  • The automaticity of size perception processing remains debated.
  • Previous research lacks empirical support for automaticity.

Purpose of the Study:

  • To investigate if size perception based on monocular distance cues is computed automatically.
  • To provide empirical evidence for the automaticity of size perception.

Main Methods:

  • Participants viewed images with monocular distance cues and superimposed digits.
  • Digits had similar physical size but differed in perceived size due to distance cues.
  • Task involved identifying the numerically larger digit.

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Main Results:

  • Decision time and error rates increased when the numerically larger digit was perceived as smaller.
  • Perceived size, influenced by distance cues, impacted task performance.
  • This effect occurred even when size or distance computation was not required.

Conclusions:

  • Size perception based on monocular distance cues is an automatic process.
  • Empirical support is provided for the automaticity assumption in visual perception.
  • This finding has implications for understanding visual information processing.