When someone chooses to start a diet, to quit smoking, or to enter an alcohol treatment program, they are showing that their preferences have changed. This project investigates the neural mechanisms underlying changes in preference. The focus is specifically on preferences for immediate versus delayed rewards, since exaggerated discounting of delayed rewards is a central process in many addictions. Previous research has shown that neural activity in two specific regions-medial prefrontal cortex and striatum-encodes the subjective value of immediate and delayed rewards during decisions. The proposed research will test whether shifts in preference are due to shifts in these neural value signals. This hypothesis will be tested for three kinds of preference changes: momentary changes due to contextual biases in decision-making (Aim 1);long-term changes due to explicit education and the use of self-control (Aim 2);and changes due to social learning (Aim 3). In each domain, manipulations will be designed to reduce myopic choices of smaller, immediate rewards and to enhance preferences for larger, delayed rewards. Functional neuroimaging will be used to identify what brain regions are engaged by these manipulations, and individuals with focal brain damage will be studied to test what brain regions are necessary for these manipulations to succeed. Since many addictions are characterized by frontal dysfunction, the studies of frontal lesions in particular will inform how these manipulations could work in addiction, and set the groundwork for future studies in addicted populations.
The prevention and treatment of many devastating health conditions-including alcoholism, drug abuse, and obesity-depends on individuals changing the decisions they make. By characterizing the neural bases for changes in people's preferences, this proposal aims to gather mechanistic knowledge that could explain why some methods are more successful than others at inducing and sustaining changes in decision making. The long-term goal of this research is to inform efforts to promote positive changes in health-related behaviors, particularly in the setting of addiction.
|McGuire, Joseph T; Kable, Joseph W (2015) Medial prefrontal cortical activity reflects dynamic re-evaluation during voluntary persistence. Nat Neurosci 18:760-6|
|Cox, Karin M; Kable, Joseph W (2014) BOLD subjective value signals exhibit robust range adaptation. J Neurosci 34:16533-43|
|Vo, Khoi; Rutledge, Robb B; Chatterjee, Anjan et al. (2014) Dorsal striatum is necessary for stimulus-value but not action-value learning in humans. Brain 137:3129-35|
|Gilaie-Dotan, Sharon; Tymula, Agnieszka; Cooper, Nicole et al. (2014) Neuroanatomy predicts individual risk attitudes. J Neurosci 34:12394-401|
|Kurzban, Robert; Duckworth, Angela; Kable, Joseph W et al. (2013) An opportunity cost model of subjective effort and task performance. Behav Brain Sci 36:661-79|
|Cooper, Nicole; Kable, Joseph W; Kim, B Kyu et al. (2013) Brain activity in valuation regions while thinking about the future predicts individual discount rates. J Neurosci 33:13150-6|
|Bartra, Oscar; McGuire, Joseph T; Kable, Joseph W (2013) The valuation system: a coordinate-based meta-analysis of BOLD fMRI experiments examining neural correlates of subjective value. Neuroimage 76:412-27|
|McGuire, Joseph T; Kable, Joseph W (2013) Rational temporal predictions can underlie apparent failures to delay gratification. Psychol Rev 120:395-410|
|Kim, Betty E; Seligman, Darryl; Kable, Joseph W (2012) Preference Reversals in Decision Making Under Risk are Accompanied by Changes in Attention to Different Attributes. Front Neurosci 6:109|
|McGuire, Joseph T; Kable, Joseph W (2012) Decision makers calibrate behavioral persistence on the basis of time-interval experience. Cognition 124:216-26|
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