No global processing deficit in the Navon task in 14 developmental prosopagnosics
No global processing deficit in the Navon task in 14 developmental prosopagnosics
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DOI：
10.1093/scan/nsm003
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发表时间：
2007-06-01
影响因子：
4.2
通讯作者：
Nakayama, Ken
中科院分区：
文献类型：
--
作者：
Duchaine, Bradley;Yovel, Galit;Nakayama, Ken
人脸的表现方式比其他物体更加抽象或整体化。大量的证据表明，这种表征是由特定于面孔的机制产生的，但也有人认为，它是由可以应用于包括单词在内的许多物体的结构机制产生的。面孔特异性假说预测，非面孔脑过程在面孔失认症患者中通常是正常的，而领域一般脑过程假说预测，它们在所有脑过程任务中都会有缺陷。虽然证据的权重有利于面部特异性假设，但最近的一项研究重新打开了这个问题，发现五分之三的发展性面容失认症患者在全局-局部任务（即Navon任务）中表现出比对照组更大的局部加工偏差。为了更彻底地研究这个问题，我们测试了一个显着更大的样本prosopagnosics（14名参与者）谁有严重的面孔记忆和面孔感知缺陷。与上一份报告相比，发展性面容失认在全局-局部任务中表现正常。与对照组一样，它们表现出典型的全局优势和典型的全局-局部一致性效应。结果表明，Navon任务所需的结构加工与人脸结构加工是分离的。
Faces are represented in a more configural or holistic manner than other objects. Substantial evidence indicates that this representation results from face-specific mechanisms, but some have argued that it is produced by configural mechanisms that can be applied to many objects including words. The face-specific hypothesis predicts that non-face configural processes will often be normal in prosopagnosic subjects, whereas the domain-general configural hypothesis predicts they will be deficient on all configural tasks. Although the weight of the evidence favors the face-specific hypothesis, a recent study reopened this issue when it was found that three out of five developmental prosopagnosics showed a larger local processing bias than controls in a global-local task (i.e. a Navon task). To examine this issue more thoroughly we tested a significantly larger sample of prosopagnosics (14 participants) who had severe face memory and face perception deficits. In contrast to the previous report, the developmental prosopagnosics performed normally in the global-local task. Like controls, they showed a typical global advantage and typical global-to-local consistency effects. The results demonstrate that the configural processing required by the Navon task is dissociable from face configural processing.