Comparing face processing strategies between typically-developed observers and observers with autism using sub-sampled-pixels presentation in response classification technique
Comparing face processing strategies between typically-developed observers and observers with autism using sub-sampled-pixels presentation in response classification technique
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DOI：
10.1016/j.visres.2013.01.001
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发表时间：
2013-03-07
期刊：
影响因子：
1.8
通讯作者：
Sekuler, Allison B.
中科院分区：
文献类型：
--
作者：
Nagai, Masayoshi;Bennett, Patrick J.;Sekuler, Allison B.
在本研究中，我们通过对视觉刺激进行亚采样来改进标准图像分类方法，从而提供了一种能够通过较少的试验来详细检查个体面部处理策略的技术。实验1证实，一个测试阶段（1450次试验）足以产生与之前10000次试验获得的分类图像在质量上相似的图像（Sekuler et al., 2004）。实验2使用该方法对自闭症谱系障碍（ASD）观察者和典型发育（TD）观察者获得的分类图像进行比较。实验1发现，从TD观察者获得的分类图像表明，他们都是基于眼睛/眉毛区域像素所传递的信息来区分人脸的。相比之下，从ASD观察者那里获得的分类图像表明，他们使用了不同的感知策略：五分之三的ASD观察者使用了典型的策略，利用了眼睛/眉毛区域的信息，但两个人使用了非典型的策略，依赖于前额区域的信息。使用反应分类技术的优势在于没有特定理论视角或先验假设的限制，这使我们能够看到意想不到的策略，如ASD的前额策略，从而表明该技术在特殊人群的检查中特别有用。(C) 2013 Elsevier Ltd.版权所有。
In the present study we modified the standard classification image method by subsampling visual stimuli to provide us with a technique capable of examining an individual's face-processing strategy in detail with fewer trials. Experiment 1 confirmed that one testing session (1450 trials) was sufficient to produce classification images that were qualitatively similar to those obtained previously with 10,000 trials (Sekuler et al., 2004). Experiment 2 used this method to compare classification images obtained from observers with autism spectrum disorders (ASD) and typically-developing (TD) observers. As was found in Experiment 1, classification images obtained from TD observers suggested that they all discriminated faces based on information conveyed by pixels in the eyes/brow region. In contrast, classification images obtained from ASD observers suggested that they used different perceptual strategies: three out of five ASD observers used a typical strategy of making use of information in the eye/brow region, but two used an atypical strategy that relied on information in the forehead region. The advantage of using the response classification technique is that there is no restriction to specific theoretical perspectives or a priori hypotheses, which enabled us to see unexpected strategies, like ASD's forehead strategy, and thus showed this technique is particularly useful in the examination of special populations. (C) 2013 Elsevier Ltd. All rights reserved.