Individual Differences in Delay Discounting Relation to Intelligence, Working Memory, and Anterior Prefrontal Cortex
Individual Differences in Delay Discounting Relation to Intelligence, Working Memory, and Anterior Prefrontal Cortex
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DOI：
10.1111/j.1467-9280.2008.02175.x
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发表时间：
2008-09-01
影响因子：
8.2
通讯作者：
Gray, Jeremy R.
中科院分区：
文献类型：
--
作者：
Shamosh, Noah A.;DeYoung, Colin G.;Gray, Jeremy R.
较低的延迟折扣（更好的自我控制）与较高的智力有关，但这种关系的基础尚不确定。为了研究工作记忆 (WM) 过程的潜在作用，我们评估了 103 名健康成年人的延迟贴现、智力 (g)、WM（跨度任务、3 背任务）和 WM 相关神经活动（使用功能磁共振成像）。延迟贴现与 g 和 WM 呈负相关。 WM 解释的延迟折扣没有超出 g 所解释的差异，这表明 WM 与延迟折扣相关的流程由 g 共享。左前额叶皮层（布罗德曼区 10）中与 WM 相关的神经活动与 g（r = .26）和延迟贴现（r = -.40）协变，并部分调节 g 和延迟贴现之间的关系。总体而言，结果表明，延迟贴现与智力相关，部分原因在于前额叶皮层中实例化的过程，该区域已知支持多种信息的整合。
Lower delay discounting (better self-control) is linked to higher intelligence, but the basis of this relation is uncertain. To investigate the potential role of working memory (WM) processes, we assessed delay discounting, intelligence (g), WM (span tasks, 3-back task), and WM-related neural activity (using functional magnetic resonance imaging) in 103 healthy adults. Delay discounting was negatively correlated with g and WM. WM explained no variance in delay discounting beyond that explained by g, which suggests that processes through which WM relates to delay discounting are shared by g. WM-related neural activity in left anterior prefrontal cortex (Brodmann's area 10) covaried with g, r = .26, and delay discounting, r = -.40, and partially mediated the relation between g and delay discounting. Overall, the results suggest that delay discounting is associated with intelligence in part because of processes instantiated in anterior prefrontal cortex, a region known to support the integration of diverse information.