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Related Experiment Videos

Contextual dependencies in a stimulus equivalence paradigm.

P Dibbets1, J H R Maes, J M H Vossen

  • 1NICI/Department of Comparative & Physiological Psychology, University of Nijmegen, The Netherlands. dibbets@nici.kun.nl

The Quarterly Journal of Experimental Psychology. B, Comparative and Physiological Psychology
|June 22, 2002
PubMed
Summary

Contextual cues influence human learning in stimulus equivalence tasks. A context change only increased response times on complex equivalence trials, not simpler baseline or symmetry trials.

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Area of Science:

  • Cognitive Psychology
  • Behavioral Science

Background:

  • Stimulus equivalence paradigms investigate learned stimulus relations.
  • Contextual cues can influence behavior, but their impact across different task complexities is not fully understood.

Purpose of the Study:

  • To investigate the role of contextual dependencies in stimulus equivalence.
  • To determine if task complexity moderates the effect of context changes on performance.

Main Methods:

  • Two experiments used matching-to-sample procedures with human subjects.
  • Contextual cues (background colors) were manipulated during training and testing.
  • Performance was assessed across baseline, symmetry, and equivalence trials under different context conditions.

Main Results:

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  • A change in context significantly increased response latency on equivalence trials.
  • No significant effects of context change were observed on baseline or symmetry trials.
  • Results suggest context-dependent effects are linked to task complexity.

Conclusions:

  • Contextual dependencies exert a greater influence on more complex cognitive tasks.
  • Findings align with theories of switch costs and habituation to contextual stimuli.
  • A model explaining differential context switch effects based on task difficulty is supported.