Grabner Roland H, Fink Andreas, Neubauer Aljoscha C
Institute of Psychology, University of Graz, Graz, Austria.
Behav Neurosci. 2007 Feb;121(1):224-30. doi: 10.1037/0735-7044.121.1.224.
In the present study, we contrast oscillatory brain activity during the production of subjectively more versus less original ideas. A sample of 26 participants worked on two verbal creativity problems and subsequently rated the produced ideas with respect to their originality. On the basis of these self-ratings, ideas were divided into a more and a less original list within each participant. Cortical activity was assessed by means of event-related changes in EEG power (synchronization and desynchronization) and phase locking in two alpha bands. Analyses revealed that more, as compared with less, original ideas elicited a stronger event-related synchronization of alpha activity (power increases from the pre-stimulus reference to the activation interval) and higher phase coupling in the right hemisphere. These findings corroborate the importance of right-hemispheric cortical networks in creative idea generation.
在本研究中，我们对比了在产生主观上更具原创性与较缺乏原创性的想法过程中的脑振荡活动。26名参与者的样本针对两个语言创造力问题展开工作，随后就所产生想法的原创性进行评分。基于这些自我评分，每个参与者的想法被分为一个更具原创性的列表和一个较缺乏原创性的列表。通过脑电图功率（同步化和去同步化）的事件相关变化以及两个阿尔法波段的锁相来评估皮层活动。分析表明，与较缺乏原创性的想法相比，更具原创性的想法引发了更强的阿尔法活动事件相关同步化（从刺激前参考到激活间隔的功率增加）以及右半球更高的相位耦合。这些发现证实了右半球皮层网络在创造性想法产生中的重要性。
