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首页> 外文期刊>Brain: A journal of neurology >The psychophysics of visual motion and global form processing in autism.
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The psychophysics of visual motion and global form processing in autism.

机译：自闭症中视觉运动和整体形式处理的心理物理学。

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Several groups have recently reported that people with autism may suffer from a deficit in visual motion processing and proposed that these deficits may be related to a general dorsal stream dysfunction. In order to test the dorsal stream deficit hypothesis, we investigated coherent and biological motion perception as well as coherent form perception in a group of adolescents with autism and a group of age-matched typically developing controls. If the dorsal stream hypothesis were true, we would expect to document deficits in both coherent and biological motion processing in this group but find no deficit in coherent form perception. Using the method of constant stimuli and standard psychophysical analysis techniques, we measured thresholds for coherent motion, biological motion and coherent form. We found that adolescents with autism showed reduced sensitivity to both coherent and biological motion but performed as well as age-matched controls during coherent form perception. Correlations between intelligence quotient and task performance, however, appear to drive much of the group difference in coherent motion perception. Differences between groups on coherent motion perception did not remain significant when intelligence quotient was controlled for, but group differences in biological motion perception were more robust, remaining significant even when intelligence quotient differences were accounted for. Additionally, aspects of task performance on the biological motion perception task were related to autism symptomatology. These results do not support a general dorsal stream dysfunction in adolescents with autism but provide evidence of a more complex impairment in higher-level dynamic attentional processes.
机译：几个研究小组最近报告说，自闭症患者可能会遭受视觉运动处理方面的缺陷，并提出这些缺陷可能与一般的背流功能障碍有关。为了测试背水流逆流假说，我们研究了一组自闭症青少年和一组与年龄相匹配的典型发育对照的相干和生物运动知觉以及相干形式知觉。如果背流假说是正确的，我们将期望记录该组在相干运动和生物运动过程中的缺陷，但是在相干形式感知中没有缺陷。使用恒定刺激的方法和标准的心理物理分析技术，我们测量了相干运动，生物运动和相干形式的阈值。我们发现自闭症青少年对连贯运动和生物运动的敏感性降低，但在连贯形式感知过程中的表现与年龄匹配的控件一样好。但是，智商与任务执行之间的相关性似乎会推动相干运动感知中的许多群体差异。当控制智商时，各组之间在连贯运动知觉上的差异并不显着，但生物运动知觉中的组间差异更为显着，即使考虑到智商差异也仍然显着。此外，生物运动感知任务的任务执行方面与自闭症症状有关。这些结果不支持自闭症青少年的一般背流功能障碍，但提供了较高水平的动态注意力过程中更复杂的损伤的证据。

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