2022
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 values
2019
Model-Free and Model-Based Influences in Addiction-Related Behaviors
Groman SM, Massi B, Mathias SR, Lee D, Taylor JR. Model-Free and Model-Based Influences in Addiction-Related Behaviors. Biological Psychiatry 2019, 85: 936-945. PMID: 30737015, PMCID: PMC6534429, DOI: 10.1016/j.biopsych.2018.12.017.Peer-Reviewed Original ResearchConceptsDecision-making taskModel-based behaviorModel-free learningModel-based learningAbility of ratsChronic drug useUnrewarded outcomesIndividual differencesDrug-induced disruptionHabitual systemAddiction vulnerabilityModel-free reinforcementBehavioral platformAction selectionDrug useSubsequent methamphetamineCore featuresLearning mechanism
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