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Response-independent outcome presentations dissociate stimulus and value based choice.

Thomas J Burton1, Alesha R Kumar1, Nura W Lingawi1

  • 1Decision Neuroscience Laboratory, School of Psychology, UNSW Sydney, Australia.

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|October 6, 2024
PubMed
Summary
This summary is machine-generated.

Specific Pavlovian-instrumental transfer (PIT) persists even when response-outcome associations are weakened. This suggests that PIT expression is robust against treatments that disrupt value-based choices, offering insights into behavioral control mechanisms.

Keywords:
Instrumental conditioningInstrumental degradationOutcome devaluationPavlovian conditioningResponse-outcome associationsSpecific Pavlovian-instrumental transfer

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Area of Science:

  • Behavioral neuroscience
  • Learning and memory
  • Decision-making

Background:

  • Specific Pavlovian-instrumental transfer (PIT) describes how cues predicting a food reward bias behavior towards actions earning that reward.
  • The exact neural mechanisms underlying specific PIT, particularly the role of response-outcome (R-O) associations, remain unclear.
  • Previous studies suggest R-O associations are crucial, but experimental designs have limitations.

Purpose of the Study:

  • To investigate whether treatments undermining R-O associations affect the expression of specific PIT.
  • To clarify the necessity of R-O associations for specific PIT by controlling for confounding Pavlovian associations.

Main Methods:

  • Employed a two-lever, two-outcome design in Experiment 1, followed by an instrumental degradation treatment.
  • Utilized a bidirectional lever in Experiments 2 and 3 to disentangle R-O associations from Pavlovian lever-outcome associations.
  • Assessed specific PIT and outcome devaluation sensitivity after instrumental degradation across different experimental setups.

Main Results:

  • Specific PIT remained intact after instrumental degradation in Experiment 1, but outcome devaluation sensitivity persisted, confounding interpretation.
  • Experiment 3, using a bidirectional lever, showed specific PIT was intact after degradation, with no evidence of outcome devaluation sensitivity.
  • These findings suggest R-O associations were effectively weakened by the degradation treatment in Experiment 3.

Conclusions:

  • The expression of specific PIT is resistant to treatments that undermine R-O associations.
  • Specific PIT is also resilient to interventions that disrupt value-based choice.
  • These results advance the understanding of the associative frameworks governing behavioral control.