Atypical updating of face representations with experience in children with autism
Atypical updating of face representations with experience in children with autism
复制标题
DOI：
10.1111/desc.12007
复制
发表时间：
2013-01-01
影响因子：
3.7
通讯作者：
Rhodes, Gillian
中科院分区：
文献类型：
--
作者：
Ewing, Louise;Pellicano, Elizabeth;Rhodes, Gillian
与典型儿童相比，自闭症儿童的面孔识别后效显著减少，这可能反映了经验的知觉更新减少。在这里，我们调查了这种相似性是否也延伸到非面部刺激类别，这可能是自闭症患者普遍存在的视觉处理差异的信号。我们使用图形后效任务直接测量了典型儿童和自闭症儿童在暴露于扭曲的直立面孔、倒置面孔和汽车后的知觉更新。研究和测试刺激之间的大小变化的可能性有限，任何处理mixicalities反映组的差异，适应低层次的功能的刺激。结果表明，相对于典型的儿童，直立的脸，但不是倒置的脸或汽车的图形后效，自闭症儿童显着减弱。此外，当我们隔离的“脸选择性”的后效组件，通过偏出的中级形状适应共同直立和倒置的脸刺激的组差异被放大。值得注意的是，典型儿童对直立面孔的后效不成比例地大于对倒置面孔和汽车的后效，但自闭症儿童的后效程度并没有根据刺激类别进行类似的调制。这些研究结果是不一致的普遍适应性编码quicicality相对于典型的儿童，并建议减少知觉更新可能构成一个高层次的，可能面临的选择性，视觉处理自闭症儿童的差异。
Face identity aftereffects are significantly diminished in children with autism relative to typical children, which may reflect reduced perceptual updating with experience. Here, we investigated whether this atypicality also extends to non-face stimulus categories, which might signal a pervasive visual processing difference in individuals with autism. We used a figural aftereffect task to measure directly perceptual updating following exposure to distorted upright faces, inverted faces and cars, in typical children and children with autism. A size-change between study and test stimuli limited the likelihood that any processing atypicalities reflected group differences in adaptation to low-level features of the stimuli. Results indicated that, relative to typical children, figural aftereffects for upright faces, but not inverted faces or cars, were significantly attenuated in children with autism. Moreover, the group difference was amplified when we isolated the 'face-selective' component of the aftereffect, by partialling out the mid-level shape adaptation common to upright and inverted face stimuli. Notably, the aftereffects of typical children were disproportionately larger for upright faces than for inverted faces and cars, but the magnitude of aftereffects of autistic children was not similarly modulated according to stimulus category. These findings are inconsistent with a pervasive adaptive coding atypicality relative to typical children, and suggest that reduced perceptual updating may constitute a high-level, and possibly face-selective, visual processing difference in children with autism.