Reckless betting is placing a larger bet on a gamble where losing is more likely than winning. It can be considered as an irrational behavior that violates normative rationality. In the present study, we focused on an information processing style derived from the dual process theory and examined the hypothesis that a rational information processing style would inhibit reckless betting. In Study 1 (N = 41), we conducted an exploratory study on the relationship between trait variables including information processing style, and reckless betting. An online experiment of between-subjects comparison design was conducted, where the number of wins and losses in the 1st session of a gambling task was manipulated to induce reckless betting. Participants’ traits, affective states, and recklessness during the gambling task were measured. The results indicated that a rational information processing style inhibited reckless betting by moderating the effect of positive affect on reckless betting. In Study 2 (N = 77), we determined the sample size based on the effect size observed in Study 1 and attempted to replicate Study 1 with a simplified experimental procedure. In addition, Study 3 (N = 75) and Study 4 (N = 76) attempted to replicate Study 1 with variations on the time pressure placed on the task. The results, however, were not consistent with those of Study 1. We discuss the inconsistencies between these results in terms of situational factors specific to online experiments and goal-oriented changes in behavioral norms.
