文章基本信息

标题：Differential Modulation of Performance in Insight and Divergent Thinking Tasks with tDCS
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作者：Goel, Vinod ; Eimontaite, Iveta ; Goel, Amit 等
期刊名称：The Journal of Problem Solving
印刷版ISSN：1932-6246
电子版ISSN：1932-6246
出版年度：2015
卷号：8
期号：1
页码：2
DOI：10.7771/1932-6246.1172
出版社：Purdue University
摘要：While both insight and divergent thinking tasks are used to study creativity, there are reasons to believe that the two may call upon very different mechanisms. To explore this hypothesis, we administered a verbal insight task (riddles) and a divergent thinking task (verbal fluency) to 16 native English speakers and 16 non-native English speakers after they underwent Transcranial Direct Current Stimulation (tDCS) of the left middle temporal gyrus and right temporo- parietal junction. We found that, in the case of the insight task the depolarization of right temporo-parietal junction and hyperpolarization of left middle temporal gyrus resulted in increased performance, relative to both the control condition and the reverse stimulation condition in both groups (non-native > native speakers). However, in the case of the divergent thinking task, the same pattern of stimulation resulted in a decrease in performance, compared to the reverse stimulation condition, in the non-native speakers. We explain this dissociation in terms of differing task demands of divergent thinking and insight tasks and speculate that the greater sensitivity of non-native speakers to tDCS stimulation may be a function of less entrenched neural networks for non-native languages.
关键词：enhancing creativity; tDCS; insight; fluency; semantic spread; mental set shift; temporal lobes