Costs and benefits of integrating information between the cerebral hemispheres: A computational perspective
Costs and benefits of integrating information between the cerebral hemispheres: A computational perspective
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DOI：
10.1037/0894-4105.12.3.380
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发表时间：
1998-07-01
期刊：
影响因子：
2.4
通讯作者：
Banich, MT
中科院分区：
文献类型：
--
作者：
Belger, A;Banich, MT
由于大脑半球的相互作用已被发现，以帮助在苛刻的条件下的任务性能，本研究探讨了这种效果是如何调节计算复杂性，侧化的程度为一项任务，和个体差异的不对称半球激活（AHA）。通过增加要处理的输入数量或增加决策步骤的数量，可以在任务之间操纵计算复杂性。内和跨半球试验的比较表明，半球间优势的大小增加的功能的任务的复杂性，除了高度偏侧化的押韵决定任务，只能由左半球。AHA的个体差异的措施表明，当任务的要求和个人的AHA都负载在同一个半球，能力划分的半球之间的处理是有限的。因此，只有当所需的操作可以在两个半球之间划分时，处理的半球间划分才能在更高水平的计算复杂度下提高性能。
Because interaction of the cerebral hemispheres has been found to aid task performance under demanding conditions, the present study examined how this effect is moderated by computational complexity, the degree of lateralization for a task, and individual differences in asymmetric hemispheric activation (AHA). Computational complexity was manipulated across tasks either by increasing the number of inputs to be processed or by increasing the number of steps to a decision. Comparison of within- and across-hemisphere trials indicated that the size of the between-hemisphere advantage increased as a function of task complexity, except for a highly lateralized rhyme decision task that can only be performed by the left hemisphere. Measures of individual differences in AHA revealed that when task demands and an individual's AHA both load on the same hemisphere, the ability to divide the processing between the hemispheres is Limited. Thus, interhemispheric division of processing improves performance at higher levels of computational complexity only when the required operations can be divided between the hemispheres.