Reward-Mediated, Model-Free Reinforcement-Learning Mechanisms in Pavlovian and Instrumental Tasks Are Related
Afshar N, Cinotti F, Martin D, Khamassi M, Calu DJ, Taylor JR, Groman SM. Reward-Mediated, Model-Free Reinforcement-Learning Mechanisms in Pavlovian and Instrumental Tasks Are Related. Journal Of Neuroscience 2022, 43: 458-471. PMID: 36216504, PMCID: PMC9864557, DOI: 10.1523/jneurosci.1113-22.2022.Peer-Reviewed Original ResearchConceptsGoal-tracking behaviorReinforcement learning mechanismInstrumental learning processesSign-tracking behaviorModel-free reinforcementApproach taskInstrumental taskInstrumental behaviorBehavioral proceduresSubjects designLearning mechanismDecision Making TaskModel-based computationLearning processModel-free reinforcement learningPredictive cuesIncentive salienceAssociative learningIndividual differencesComputational mechanismsDecision-making processPavlovianModel-based algorithmValue representationAction valuesTargeted effects of ketamine on perceptual expectation during mediated learning in rats
Fleming LM, Jaynes FB, Thompson SL, Corlett PR, Taylor JR. Targeted effects of ketamine on perceptual expectation during mediated learning in rats. Psychopharmacology 2022, 239: 2395-2405. PMID: 35389087, PMCID: PMC9296571, DOI: 10.1007/s00213-022-06128-2.Peer-Reviewed Original ResearchConceptsPerceptual expectationsHallucination-like experiencesMemory representationsExpected cueDevaluation phasePerceptual experienceNeural correlatesAssociative learningLearning taskTask phasesExternal outcomesDirect learningLearningEffects of ketamineExpectationsRetrievalConclusionsThese resultsModerate dosePerceptCausal relationshipCuesExperienceRepresentationTaskRecent work