Schmidt Barbara, Mussel Patrick, Osinsky Roman, Rasch Björn, Debener Stefan, Hewig Johannes
Institute of Psychology, University of Würzburg, Würzburg, Germany; Institute of Psychology, University of Jena, Jena, Germany.
Institute of Psychology, University of Würzburg, Würzburg, Germany.
Biol Psychol. 2017 May;126:82-88. doi: 10.1016/j.biopsycho.2017.04.010. Epub 2017 Apr 23.
Task motivation depends on what we did before. A recent theory differentiates between tasks that we want to do and tasks that we have to do. After a have-to task, motivation shifts towards a want-to task. We measured this shift of motivation via brain responses to monetary feedback in a risk game that was used as want-to task in our study. We tested 20 healthy participants that were about 28 years old in a within-subjects design. Participants worked on a Stroop task (have-to task) or an easier version of the Stroop task as a control condition and played a risk game afterwards (want-to task). After the Stroop task, brain responses to monetary feedback in the risk game were larger compared to the easier control task, especially for feedback indicating higher monetary rewards. We conclude that higher amplitudes of feedback-related brain responses in the risk game reflect the shift of motivation after a have-to task towards a want-to task.
任务动机取决于我们之前所做的事情。最近有一种理论区分了我们想要做的任务和我们必须做的任务。在完成一项必须做的任务后，动机转向一项想要做的任务。在一项风险游戏中，我们通过大脑对金钱反馈的反应来测量这种动机的转变，该风险游戏在我们的研究中被用作想要做的任务。我们采用被试内设计测试了20名年龄约28岁的健康参与者。参与者完成一项斯特鲁普任务（必须做的任务）或一个更简单版本的斯特鲁普任务作为对照条件，然后进行一场风险游戏（想要做的任务）。与更简单的对照任务相比，完成斯特鲁普任务后，参与者在风险游戏中对金钱反馈的大脑反应更大，尤其是对于表明更高金钱奖励的反馈。我们得出结论，风险游戏中与反馈相关的大脑反应的更高振幅反映了在完成一项必须做的任务后动机向一项想要做的任务的转变。
