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Learned changes in stimulus representations (a personal history).

Geoffrey Hall1

  • 1Department of Psychology, University of York, UK. g.hall@psych.york.ac.uk

The Spanish Journal of Psychology
|November 13, 2007
PubMed
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Experience can decrease stimulus associability, contrary to acquired distinctiveness theories. Research explores how pre-exposure effects in associative learning and perceptual learning are explained by salience modulation.

Area of Science:

  • Cognitive Psychology
  • Neuroscience
  • Learning and Memory

Background:

  • Investigates how prior experience with stimuli influences subsequent associative learning.
  • Challenges the traditional view of acquired distinctiveness of cues.
  • Explores the role of stimulus pre-exposure in modifying learning.

Purpose of the Study:

  • To examine how experience alters stimulus effectiveness in associative learning.
  • To reconcile findings of reduced associability with pre-exposure facilitation effects.
  • To investigate the concept of salience modulation as a learning mechanism.

Main Methods:

  • Review of personal research program spanning 40 years.
  • Experiments primarily using rats to study associative learning.

Related Experiment Videos

  • Studies on human perceptual learning to investigate salience modulation.

    • Main Results:

    • Experience often reduces, rather than enhances, stimulus associability.
    • Some pre-exposure effects are explained by associative principles.
    • Other effects suggest a novel learning process modulating stimulus salience.

    Conclusions:

    • Prior experience can decrease stimulus effectiveness in associative learning.
    • Salience modulation offers an explanation for facilitation effects in discrimination learning.
    • This research extends to understanding human perceptual learning and attention.