Gender-specific strategy use and neural correlates in a spatial perspective taking task
Gender-specific strategy use and neural correlates in a spatial perspective taking task
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DOI：
10.1016/j.neuropsychologia.2008.04.013
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发表时间：
2008-08-01
期刊：
影响因子：
2.6
通讯作者：
Vogeley, Kai
中科院分区：
文献类型：
--
作者：
Kaiser, Stefan;Walther, Stephan;Vogeley, Kai
在本研究的背景下，空间透视是指在空间中将自己的自我中心观点转移到他人的观点上的能力。我们采用了空间透视提取范式，并进行了功能磁共振成像研究，以评估在透视提取过程中神经活动的性别差异。24名健康受试者(男12人，女12人)被要求系统地采用自己的视角(第一人称视角，1 PP)或他人视角(第三人称视角，3PP)。呈现的刺激由一个虚拟场景组成，周围有一个化身和红色的球，如果可以看到，必须从1PP或3PP开始计算。在认知更努力的3PP条件下，反应时增加，正确率分数降低。与女性受试者的1PP相比，正确率分数在3PP期间的表现有更明显的下降趋势。从1PP到3PP，女性受试者的正确率分数下降了6.7%，而男性受试者的这一表现下降了2.7%。实验结束后的汇报，取决于旋转角度和错误率的反应时间表明，男性更有可能使用基于对象的策略，而不是女性始终如一地使用自我中心视角转换。在整个组中，顶枕区、右下额下区和辅助运动区的神经活动增加，证实了先前的研究。就性别而言，在感兴趣区方法中，男性受试者在楔前和右下额下回表现出比女性受试者更强的激活。在一组男性受试者中，他们的策略报告建议了基于对象的策略，这些差异似乎更加明显。总之，脑区的不同招募很可能反映了解决这一空间视角提取任务的不同策略。(C)2008爱思唯尔有限公司。保留所有权利。
In the context of the present study spatial perspective taking refers to the ability to translocate one's own egocentric viewpoint to somebody else's viewpoint in space. We adopted a spatial perspective taking paradigm and performed a functional magnetic resonance imaging study to assess gender differences of neural activity during perspective taking. 24 healthy subjects (12 male/12 female) were asked to systematically either take their own (first-person-perspective, 1 PP) or another person's perspective (third-person-perspective, 3PP). Presented stimuli consisted of a virtual scenery with an avatar and red balls around him that had to be counted, if visible, from 1 PP or 3PP. Reaction time was increased and correctness scores were decreased during the cognitively more effortful 3PP condition. Correctness scores showed a trend towards a more pronounced decline of performance during 3PP as compared to 1PP in female subjects. Female subjects correctness scores declined by 6.7% from 1PP to 3PP, while in male subjects this performance decline was only 2.7%. Debriefings after the experiment, reaction times depending on angle of rotation and error rates suggest that males are more likely to employ an object-based strategy in contrast to a consistently employed egocentric perspective transformation in females. In the whole group, neural activity was increased in the parieto-occipital, right inferior frontal and supplementary motor areas, confirming previous studies. With respect to gender, male subjects showed stronger activation in the precuneus and the right inferior frontal gyrus than female subjects in a region-of-interest approach. In a subgroup of male subjects whose strategy reports suggest object-based strategies these differences seem to be more pronounced. In conclusion, the differential recruitment of brain regions most likely reflects different strategies in solving this spatial perspective taking task. (C) 2008 Elsevier Ltd. All rights reserved.