Added noise affects the neural correlates of upright and inverted faces differently.
Added noise affects the neural correlates of upright and inverted faces differently.
复制标题
添加的噪声对直立脸和倒立脸的神经关联的影响不同。
DOI：
10.1167/7.4.4
复制
发表时间：
2007
影响因子：
1.8
通讯作者：
Busey,ThomasA
中科院分区：
文献类型：
--
作者：
Schneider,BethanyL;DeLong,JordanE;Busey,ThomasA
在五个实验中，我们研究了直立面孔、倒立面孔和视觉噪声之间相互作用的神经相关性。在实验 1 中，我们检查了一个名为 N170 的组件，用于显示有噪声和没有噪声的直立和倒立面部。结果显示，当存在噪声时，倒置面部的振幅比直立面部的振幅更小，而没有噪声时则相反。在实验 2 中，我们表明，在所有噪声级别上，振幅反转对于全脸而言是稳健的，但对于单独的眼睛而言则不然。在实验 3 中，我们改变对比度，看看这种逆转是否是面部退化的结果。我们观察到没有逆转效应。因此，在各种条件下，向全脸添加噪声是 N170 反转的充分条件。在实验 4 中，我们延迟了噪声中出现的面孔的出现。我们无延迟地复制较小的 N170 倒置面，但观察到在静态噪声中较长延迟时 N170 的倒置面部分恢复。实验 5 演示了行为层面的低对比度交互。我们提出了一种模型，其中噪声与倒立面孔的处理特性的相互作用比直立面孔的相互作用更大。
In five experiments, we examine the neural correlates of the interaction between upright faces, inverted faces, and visual noise. In Experiment 1, we examine a component termed the N170 for upright and inverted faces presented with and without noise. Results show a smaller amplitude for inverted faces than upright faces when presented in noise, whereas the reverse is true without noise. In Experiment 2, we show that the amplitude reversal is robust for full faces but not eyes alone across all noise levels. In Experiment 3, we vary contrast to see if this reversal is a result of degrading a face. We observe no reversal effects. Thus, across conditions, adding noise to full faces is a sufficient condition for the N170 reversal. In Experiment 4, we delay the onsets of the faces presented in noise. We replicate the smaller N170 for inverted faces at no delay but observe partial recovery of the N170 for inverted faces at longer delays in static noise. Experiment 5 demonstrates the interaction in low contrast at a behavioral level. We propose a model in which noise interacts with the processing properties of inverted faces more so than upright faces.