Specificity of reinforcement for risk behaviors of the Balloon Analog Risk Task using math models of performance

Abstract

Risky decision-making has been studied using multitrial behavioral tasks. Concordance of such tasks to risky behaviors could be improved by: (1) mathematically modeling the components of decision change and (2) providing reinforcement specific to the risk behavior studied. Men completed two Balloon Analog Risk Tasks (BART). One provided financial reinforcement (money) and the other provided sexual reinforcement (seconds of erotic film viewing). Parameters of a mathematical model of BART performance were fit to each individual. Correlations between the model parameters and four risk categories (financial, sexual, antisociality, and substance use) demonstrated predictive utility for the same behaviors regardless of task reinforcement, providing little evidence of reinforcement specificity. A reward sensitivity parameter was uniquely related to sexual risk behavior. Additional analyses explored parameter stability fit to fewer trials.

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