University of Illinois Urbana-Champaign

The perception of good and bad natural scene category exemplars

Caddigan, Eamon

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Caddigan_Eamon.pdf

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https://hdl.handle.net/2142/34466

Description

Title
The perception of good and bad natural scene category exemplars
Author(s)
Caddigan, Eamon
Issue Date
2012-09-18T21:18:30Z
Director of Research (if dissertation) or Advisor (if thesis)
Beck, Diane M.
Doctoral Committee Chair(s)
Beck, Diane M.
Committee Member(s)
  • Li, Fei-Fei
  • Simons, Daniel J.
  • Hummel, John E.
  • Lleras, Alejandro
Department of Study
Psychology
Discipline
Psychology
Degree Granting Institution
University of Illinois at Urbana-Champaign
Degree Name
Ph.D.
Degree Level
Dissertation
Date of Ingest
2012-09-18T21:18:30Z
Keyword(s)
Scene Perception
Abstract
Images of natural scenes are easily categorized by human observers. Recent work has shown that “good” images, or those that are more representative of their category, are more easily categorized than “bad” ones. The present research investigates a novel hypothesis: that “good” images of scenes are more easily perceived than bad images. Participants performed a two-alternative forced choice task in which they indicated whether an image was an intact or phase-scrambled scene photograph. In this task, observers were able to “see” good images better than bad scenes, more accurately detecting their brief presentations. This effect is not influenced by prior knowledge about the categories used in the experiment. Scene inversion is also shown to have a similar effect on the intact/scrambled discrimination effect, but it does not interact with category representativeness, indicating that the advantage conferred by good exemplars is invariant to inversion. Finally, the good and bad images were analyzed using an objective estimate of image typicality, and this factor was also shown to predict observers' ability to detect the images. These results document a close relationship between natural scene categorization and detection, suggesting that rapid scene perception is strongly influenced by our experience with typical and representative environments.
Graduation Semester
2012-08
Permalink
http://hdl.handle.net/2142/34466
Copyright and License Information
Copyright 2012 Eamon Caddigan

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