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Related Experiment Video

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Creating Objects and Object Categories for Studying Perception and Perceptual Learning
14:38

Creating Objects and Object Categories for Studying Perception and Perceptual Learning

Published on: November 2, 2012

Detecting objects is easier than categorizing them.

Jeffrey S Bowers1, Keely W Jones

  • 1Department of Experimental Psychology, University of Bristol, 12a Priory Road, Clifton, Bristol BS8 1TU, UK. j.bowers@bris.ac.uk

Quarterly Journal of Experimental Psychology (2006)
|February 27, 2008
PubMed
Summary

Participants performed similarly on object detection and easy object categorization tasks. However, difficult object categorization led to slower response times, challenging previous findings on shared mechanisms for figure-ground segregation and categorization.

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Area of Science:

  • Cognitive Psychology
  • Neuroscience
  • Visual Perception

Background:

  • Previous research suggested object detection and basic-level categorization share neural mechanisms.
  • Grill-Spector and Kanwisher (2005) found equivalent performance in these tasks, supporting a unified mechanism.

Purpose of the Study:

  • To compare performance in object detection versus object categorization under varying difficulty levels.
  • To investigate whether figure-ground segregation and basic-level categorization rely on the same cognitive mechanisms.

Main Methods:

  • Two experiments were conducted involving object detection and object categorization tasks.
  • Participants categorized images as objects/nonobjects or into basic-level categories (easy: dogs vs. buses; difficult: dogs vs. cats).

Main Results:

  • Performance was similar in object detection and easy categorization tasks.
  • Response times were significantly slower for the difficult object categorization task compared to detection.

Conclusions:

  • The slower response times in difficult categorization challenge the notion of a single mechanism for figure-ground segregation and basic-level categorization.
  • Findings suggest distinct or more complex mechanisms may underlie different levels of visual processing and categorization.