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Perceptual classes established with forced-choice primary generalization tests and transfer of function.

K F Reeve1, L Fields

  • 1Queens College andThe Graduate School and University Center of the City University of New York, Flushing 11367, USA. DrKFReeve@aol.com

Journal of the Experimental Analysis of Behavior
|August 23, 2001
PubMed
Summary

College students learned to differentiate stimuli based on interior fill percentage. Results show that the number of generalization trials influenced how stimuli were categorized into perceptual classes, enabling new response learning.

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Area of Science:

  • Cognitive Psychology
  • Behavioral Science

Background:

  • Understanding how individuals form perceptual categories is crucial for explaining learning and generalization.
  • Previous research has explored stimulus generalization but less is known about how category formation influences subsequent learning.

Purpose of the Study:

  • To investigate how the number of generalization trials affects the formation of perceptual classes.
  • To examine whether established perceptual classes facilitate the transfer of newly learned responses.

Main Methods:

  • Experiment 1: College students learned identity conditional discriminations with varying fill percentages, followed by generalization tests with different numbers of trials and comparison stimuli.
  • Experiment 2: Perceptual classes were established using extensive forced-choice generalization, followed by a three-choice generalization test for a new selection-based response.

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Main Results:

  • Generalization gradients were not affected by the number of trials in a two-choice test but were influenced by the addition of a 'neither' option.
  • Perceptual classes formed by extensive generalization trials facilitated the transfer of a new selection-based response, with overlapping generalization gradients observed.

Conclusions:

  • Stimuli within a range of fill percentages function as members of perceptual classes.
  • These perceptual classes act as networks for transferring newly learned responses, demonstrating a flexible learning mechanism.