Evidence of an eye movement-based memory effect in congenital prosopagnosia
Evidence of an eye movement-based memory effect in congenital prosopagnosia
复制标题
DOI：
10.1016/j.cortex.2007.02.004
复制
发表时间：
2008-07-01
期刊：
影响因子：
3.6
通讯作者：
Hodgson, Timothy L.
中科院分区：
文献类型：
--
作者：
Bate, Sarah;Haslam, Catherine;Hodgson, Timothy L.
虽然大量的工作研究了隐性认知在获得性面容失认症中的作用，但很少有人关注这种先天性疾病的这一过程。事实上，只有在一个先天病例中证明了隐蔽识别的证据，其中自主测量提供了识别的证据(Jones和Tranel，2001)，而两项使用行为指标的研究未能证明其效果(De Haan和Campbell，1991；Bentin等人，1999)。在这篇论文中，我们使用了一种行为指标，“基于眼动的记忆效应”(Althoff和Cohen，1999)，来提供先天性面认失认症的隐蔽识别的证据。在最初的实验中，我们检查了控制组参与者对著名面孔和新面孔的观看策略，发现与新面孔相比，著名面孔的注视次数更少，区域抽样也更少。在第二个实验中，我们在一名先天性面容失认症(AA)患者身上检查了同样的过程，发现了一些基于眼动的记忆效应的证据，而不考虑他的识别准确性。最后，我们检查了AA未能明确识别的著名人脸的扫描策略是否明显不同，并再次发现了著名人脸采样减少的证据。我们利用这些发现：(A)在先天性失认症病例中提供完整的结构表征的证据，以及(B)表明在这种疾病中可以使用行为指标来证明隐蔽识别。(C)2007年爱思唯尔·马森先生版权所有。
While extensive work has examined the role of covert recognition in acquired prosopagnosia, little attention has been directed to this process in the congenital form of the disorder. Indeed, evidence of covert recognition has only been demonstrated in one congenital case in which autonomic measures provided evidence of recognition (Jones and Tranel, 2001), whereas two investigations using behavioural indicators failed to demonstrate the effect (de Haan and Campbell, 1991; Bentin et al., 1999). In this paper, we use a behavioural indicator, an "eye movement-based memory effect" (Althoff and Cohen, 1999), to provide evidence of covert recognition in congenital prosopagnosia. In an initial experiment, we examined viewing strategies elicited to famous and novel faces in control participants, and found fewer fixations and reduced regional sampling for famous compared to novel faces. In a second experiment, we examined the same processes in a patient with congenital prosopagnosia (AA), and found some evidence of an eye movement-based memory effect regardless of his recognition accuracy. Finally, we examined whether a difference in scanning strategy was evident for those famous faces AA failed to explicitly recognise, and again found evidence of reduced sampling for famous faces. We use these findings to (a) provide evidence of intact structural representations in a case of congenital prosopagnosia, and (b) to suggest that covert recognition can be demonstrated using behavioural indicators in this disorder. (C) 2007 Elsevier Masson Srl. All rights reserved.