Effects of repetition learning on upright, inverted and contrast-reversed face processing using ERPs
Effects of repetition learning on upright, inverted and contrast-reversed face processing using ERPs
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DOI：
10.1016/j.neuroimage.2003.12.016
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发表时间：
2004-04-01
期刊：
影响因子：
5.7
通讯作者：
Taylor, MJ
中科院分区：
文献类型：
--
作者：
Itier, RJ;Taylor, MJ
在目标学习阶段之后的目标/非目标辨别任务中，使用事件相关电位（ERP）研究了短期学习对倒立、对比反转和直立面孔记忆的影响。尽管与直立面孔相比，受试者对倒立面孔和消极面孔的反应速度更慢，但对所有三种面孔类型的准确度相同。面部类型影响早期 ERP 组件 P1 和 N170，以及额叶和顶叶部位的长潜伏期组件，反映了处理倒置面部的难度。我们发现面部类型对 PI 和 N170 延迟和幅度有不同的影响，这表明面部处理可以在 100-120 毫秒左右开始，并且对面部配置敏感。在早期和长潜伏期成分中也发现了重复效应。重复目标的 N170 潜伏期和振幅减少可能是由于知觉启动所致。对于倒置和负脸，N250 上的重复效果会延迟，这表明对这些格式存储的面部表征的访问会延迟。额极阳性率在 250-300 毫秒时增加，顶叶阳性率从 300 毫秒增加到 500 毫秒，反映了熟悉的“新旧”重复效应，这对于所有三种面部类型具有相似的幅度，表明对所有面部的准确识别。因此，虽然结构编码被反转和对比反转破坏，但学习阶段足以消除这些配置操作的行为影响；所有三种脸型都同样得到了很好的识别，这反映为同样大的顶叶新旧效应。 (C) 2004 Elsevier Inc. 保留所有权利。
The effects of short-term learning on memory for inverted, contrast-reversed and upright faces were investigated using event-related potentials (ERPs) in a target/nontarget discrimination task following a learning phase of the target. Subjects were equally accurate for all three face types although responding more slowly to inverted and negative faces compared to upright faces. Face type affected both early ERP components P1 and N170, and long-latency components at frontal and parietal sites, reflecting the difficulty of processing inverted faces. Different effects of face type were found for PI and N170 latencies and amplitudes, suggesting face processing could start around 100-120 ms and is sensitive to facial configuration. Repetition effects were also found on both early and long-latency components. Reduced N170 latency and amplitude for repeated targets are likely due to perceptual priming. Repetition effects on the N250 were delayed for inverted and negative faces, suggesting delayed access to stored facial representations for these formats. Increased frontopolar positivity at 250-300 ms and parietal positivity from 300 to 500 ms reflected familiarity 'old-new' repetition effects that were of similar magnitude for all three face types, indexing the accurate recognition of all faces. Thus, while structural encoding was disrupted by inversion and contrast-reversal, the learning phase was sufficient to abolish the effects of these configural manipulations behaviourally; all three face types were equally well recognised and this was reflected as equally large parietal old-new effects. (C) 2004 Elsevier Inc. All rights reserved.