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Related Experiment Videos

Clustering in artificial categories: an equivalence analysis.

M Galizio1, K L Stewart, C Pilgrim

  • 1Department of Psychology, University of North Carolina, Wilmington 28403, USA. galizio@uncwil.edu

Psychonomic Bulletin & Review
|November 10, 2001
PubMed
Summary

Researchers studied category clustering using artificial categories and stimulus equivalence. Findings show that learning artificial categories leads to clustering in recall, especially after establishing stimulus equivalence.

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Area of Science:

  • Cognitive Psychology
  • Behavioral Science

Background:

  • Category clustering is a known phenomenon in memory recall for familiar categories.
  • Research on clustering with artificial categories is limited, hindering experimental control.

Purpose of the Study:

  • To investigate category clustering in free recall using artificial categories.
  • To explore the utility of stimulus-equivalence methodology in studying cognitive phenomena.
  • To determine if equivalence class formation enhances category clustering.

Main Methods:

  • College students learned artificial categories through arbitrary match-to-sample training.
  • Stimulus-equivalence methodology was employed to establish conditional discriminations.
  • Free-recall tests were administered before and after equivalence testing.

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Main Results:

  • Evidence of within-class clustering was observed both before and after equivalence testing.
  • Category clustering was significantly more pronounced after equivalence tests.
  • Stimulus-equivalence methodology facilitated experimental control over category learning.

Conclusions:

  • Classic memory phenomena like clustering can be studied using stimulus-equivalence methodology.
  • Equivalence class formation strengthens category clustering in free recall.
  • This approach allows for greater experimental control in cognitive research.