Sign-tracking is an expectancy-mediated behavior that relies on prediction error mechanisms

Learning & Memory
Rifka C DermanAndrew R Delamater

Abstract

When discrete localizable stimuli are used during appetitive Pavlovian conditioning, "sign-tracking" and "goal-tracking" responses emerge. Sign-tracking is observed when conditioned responding is directed toward the CS, whereas goal-tracking manifests as responding directed to the site of expected reward delivery. These behaviors seem to rely on distinct, though overlapping neural circuitries, and, possibly, distinct psychological processes as well, and are thought to be related to addiction vulnerability. One currently popular view is that sign-tracking reflects an incentive motivational process, whereas goal-tracking reflects the influence of more top-down cognitive processes. To test these ideas, we used illness-induced outcome-devaluation and Kamin blocking procedures to determine whether these behaviors rely on similar or distinct underlying associative mechanisms. In Experiments 1 and 2 we showed that outcome-devaluation reduced sign-tracking responses, demonstrating that sign-tracking is controlled by reward expectancies. We also observed that post-CS goal-tracking in these animals is also devaluation sensitive. To test whether these two types of behaviors rely on similar or different prediction error mechanisms, we next...Continue Reading

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Citations

Mar 3, 2020·Frontiers in Behavioral Neuroscience·Sara E KeeferDonna J Calu
Jan 30, 2020·Frontiers in Behavioral Neuroscience·Analise N RodeSara E Morrison
Jan 24, 2020·Neuroscience and Biobehavioral Reviews·Janna M ColaizziMartin P Paulus
Jan 27, 2021·Neuroscience and Biobehavioral Reviews·Mayank Aggarwal, Jeffery R Wickens
Apr 14, 2021·Cognitive, Affective & Behavioral Neuroscience·M VigoritoA J Pra Sisto

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