Neural mechanisms of general fluid intelligence
Neural mechanisms of general fluid intelligence
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DOI：
10.1038/nn1014
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发表时间：
2003-03-01
影响因子：
25
通讯作者：
Braver, TS
中科院分区：
文献类型：
--
作者：
Gray, JR;Chabris, CF;Braver, TS
我们使用个体差异方法来测试一般流体智力（gF）是否是由支持注意力（执行）控制的大脑区域介导的，包括前额皮质的子区域。 48 名参与者首先完成了 gF（Raven 高级渐进矩阵）的标准测量。然后，他们执行具有挑战性的工作记忆任务（三背）的语言和非语言版本，同时使用功能磁共振成像（fMRI）测量他们的大脑活动。由于试验间干扰的差异，三后卫任务中的试验对注意力控制的需求差异很大。具体来说，在高干扰试验中，gF 较高的参与者的准确性更高，并且在多个大脑区域具有更强的事件相关神经活动。多元回归分析表明，外侧前额叶和顶叶区域可能介导能力（gF）和表现（干扰下的准确性）之间的关系，为支持 gF 的神经机制提供了限制。
We used an individual-differences approach to test whether general fluid intelligence (gF) is mediated by brain regions that support attentional (executive) control, including subregions of the prefrontal cortex. Forty-eight participants first completed a standard measure of gF (Raven's Advanced Progressive Matrices). They then performed verbal and nonverbal versions of a challenging working-memory task (three-back) while their brain activity was measured using functional magnetic resonance imaging (fMRI). Trials within the three-back task varied greatly in the demand for attentional control because of differences in trial-to-trial interference. On high-interference trials specifically, participants with higher gF were more accurate and had greater event-related neural activity in several brain regions. Multiple regression analyses indicated that lateral prefrontal and parietal regions may mediate the relation between ability (gF) and performance (accuracy despite interference), providing constraints on the neural mechanisms that support gF.