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Creating Objects and Object Categories for Studying Perception and Perceptual Learning
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Published on: November 2, 2012

The origin of exemplar effects in rule-driven categorization.

Guy L Lacroix1, Gyslain Giguère, Serge Larochelle

  • 1Department of Psychology, Concordia University, Montréal, Quebec, Canada.

Journal of Experimental Psychology. Learning, Memory, and Cognition
|March 10, 2005
PubMed
Summary

Exemplar memory influences rule-based categorization when attention is directed to specific attributes. This effect occurs regardless of stimulus individuation in incidental learning, highlighting the role of rule-relevant information.

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Area of Science:

  • Cognitive Psychology
  • Human Memory
  • Categorization Research

Background:

  • Exemplar memory's impact on categorization, even with explicit rules, was previously established.
  • Prior research suggested stimulus individuation is necessary for exemplar effects in rule application.

Purpose of the Study:

  • To investigate the conditions under which exemplar effects influence rule-driven categorization.
  • To clarify the role of interchangeable attributes and stimulus individuation in exemplar-based categorization.

Main Methods:

  • Experiments 1-3 examined the influence of non-rule attributes on categorization when attention was manipulated.
  • Experiment 4 explored exemplar effects in incidental learning with and without stimulus individuation.

Main Results:

  • Interchangeable attributes affected categorization only when explicitly attended to.
  • Exemplar effects were observed in incidental learning, irrespective of stimulus individuation.

Conclusions:

  • Exemplar learning's influence on rule-driven categorization depends on attributes within the rule or instructions.
  • Stimulus gestalts are not the primary source of exemplar effects in this paradigm.