Development and Validity of the New Gambling Task “Game of Dice Task-Revision (GDT-R)”


  • Takada Takuhiro University of Tsukuba, Shintaro, Yukawa, University of Tsukuba


Various types of gambling tasks have been used for investigating the gambling behavior. However, those tasks can measure only few sides of gambling behavior per one task. In this study, the authors developed a new gambling task, the Game of Dice Task-Revision?GDT-R? that modified the Game of Dice Task?GDT; Brand et al., 2005?. The GDT-R can measure the risk of gambling, bet, speed, and the time of an end. And we conducted two experiments with healthy undergraduates to confirm the validity of the GDT-R. In Experiment 1, participants?N = 60? performed the GDT-R, Iowa Gambling Task?IGT; Bechara et al., 1994?, and the actual Roulette. We compared the behaviors of each task. Results indicated that participants behaves similarly among the GDT-R and Roulette. And there were no significant correlation among the GDT-R and IGT. So it seems that the GDT-R is the task that resembles the reality scene. In Experiment 2, participants?N = 30?performed the GDT-R, and we assessed their emotional states and perceived luck before the first trial and after every trial. Results indicated that after participants experienced wins, compared to losses, their emotional state became more positive and aroused, and their perceived luck increased. These findings are consistent with the results of the previous studies using the GDT. The utility of the GDT-R is explored.