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Related Experiment Videos

Multiple functions of context during conditioning: a developmental analysis.

M B Carew1, J W Rudy

  • 1Department of Psychology, University of Colorado, Boulder 80309.

Developmental Psychobiology
|April 1, 1991
PubMed
Summary
This summary is machine-generated.

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Contextual stimuli influence behavior through associations and by clarifying cues. These functions develop differently in young rats, with associations forming earlier than cue clarification.

Area of Science:

  • Neuroscience
  • Developmental Psychology
  • Behavioral Science

Background:

  • Contextual stimuli influence conditioned behavior via associations with unconditioned stimuli (US) and by disambiguating conditioned stimuli (CS).
  • These two functions of context may be differentially regulated during development.

Purpose of the Study:

  • To investigate the developmental dissociation of context-US associations and context-mediated CS disambiguation in rats.
  • To determine the age at which these distinct contextual functions emerge during early development.

Main Methods:

  • Appetitive Pavlovian conditioning in rats at different postnatal ages (Day 17 vs. Days 20-23).
  • Assessed context-US associations by testing if US presentations in the training context restored extinguished CS responding.

Related Experiment Videos

  • Evaluated CS disambiguation by examining if context shifts during extinction preserved subsequent CS responding in the original context.

    • Main Results:

    • Rats trained on Postnatal Day 17 showed evidence of context-US associations.
    • Evidence for the context's disambiguation function was only observed in rats trained from Postnatal Day 20-23.
    • Context-US associations emerged earlier than the context's role in clarifying ambiguous conditioned stimuli.

    Conclusions:

    • The development of context-US associations and context-mediated CS disambiguation are distinct processes.
    • These findings support the idea of dissociable developmental trajectories for different forms of contextual learning.
    • The results align with theories on the development of relational representations and hippocampal function in contextual processing.