The purpose of this study was to examine the difference in decision-making ability in the internet game addict. In addition, we evaluated the behavioral activation system and behavioral inhibition system on Iowa Gambling Task (IGT) performance was evaluated. We recruited 613 undergraduate students for participation in this study. They were asked to complete the questionnaires concerned with the Internet game addiction, and selected 30 in the ‘internet game addiction group' and 31 in 'control group'. The students performed the IGT and completed the Behavioral Activation System/Behavioral Inhibition System (BAS/BIS) scale. The results showed that the Internet game addiction group performed poorly on the IGT. Internet game addiction group did not improve their chosen behaviors over time, whereas the control group showed a learning effect. The behavioral activation system and behavioral inhibition system had no impact on the IGT performance on those determined to be internet addicts. Finally, the limitations and suggestion for further research were discussed.
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