Exploring the Link between Impulsivity, using the UPPS-P Impulsive Behavior Scale, and Decision-making Regarding Risky Choice

Acting without forethought is a characteristic some individuals exhibit in their everyday lives, particularly those prone to impulsive behaviour. Many personality models incorporate impulsivity as a fundamental psychological construct. Consequently, understanding how impulsivity influences decision-making, especially in risky contexts, is essential for understanding the behavioural manifestation of personality traits. In this study, we aimed to determine the association between impulsivity, measured by the UPPS-P Impulsive Behavior Scale, and risky choice decision-making, measured by a risky choice paradigm. A total of one hundred and forty-two participants took part in our online study, where they completed the risky-choice paradigm as well as the UPPS-P questionnaire. The task involved presenting participants with a choice between risky and certain options. A regression analysis was conducted to examine the relationship between their probability of selecting the risky option, their reaction time when making that choice, and their UPPS-P Impulsive Behavior Scale scores. The results revealed that higher scores on the UPPS-P predicted a higher probability of picking the risky option. Moreover, higher scores on this scale predicted faster reaction times in the task, especially when participants rated high on both (Positive and Negative) Urgency subscales of the UPPS-P. Overall, this study provides a deeper understanding of how distinct facets of impulsivity contribute to risky decision-making behaviours, particularly by influencing both the likelihood and speed of risky choices.