阿部准教授らの論文が『Neuroreport』に掲載されました
阿部修士准教授らの論文が、学術誌『Neuroreport』に掲載されました。
本研究は正直な行為に関わる脳機能について、fMRIを用いて調べた研究です。本研究では特に、ズルをすることで報酬を獲得できる条件と罰を回避できる条件を設定し、そういったズルをしない際の正直な行為の選択に関わる脳のはたらきを調べました。その結果、正直な行為の選択はどちらの条件においても、前頭前野による行動制御を必要としない自動的なプロセスに基づいている可能性が示唆されました。この研究はこころの未来研究センター連携MRI研究施設のMRIを用いて行われました。
Yoneda M, Ueda R, Ashida H, Abe N(2017). Automatic honesty forgoing reward acquisition and punishment avoidance: a functional MRI investigation. Neuroreport 28: 879-883https://goo.gl/sYKwfv ※認証有り
○Abstract
Recent neuroimaging investigations into human honesty suggest that honest moral decisions in individuals who consistently behave honestly occur automatically, without the need for active self-control. However, it remains unclear whether this observation can be applied to two different types of honesty: honesty forgoing dishonest reward acquisition and honesty forgoing dishonest punishment avoidance. To address this issue, a functional MRI study, using an incentivized prediction task in which participants were confronted with real and repeated opportunities for dishonest gain leading to reward acquisition and punishment avoidance, was conducted. Behavioral data revealed that the frequency of dishonesty was equivalent between the opportunities for dishonest reward acquisition and for punishment avoidance. Reaction time data demonstrated that two types of honest decisions in the opportunity for dishonest reward acquisition and punishment avoidance required no additional cognitive control. Neuroimaging data revealed that honest decisions in the opportunity for dishonest reward acquisition and those for punishment avoidance required no additional control-related activity compared with a control condition in which no opportunity for dishonest behavior was given. These results suggest that honesty flows automatically, irrespective of the concomitant motivation for dishonesty leading to reward acquisition and punishment avoidance.
○Keywords
functional MRI; honesty; prefrontal cortex; punishment; reward
2017/10/05