Study on the hierarchical processing of biomotion in individuals with Williams Syndrome

生物运动是一种视觉现象，我们的视觉系统可以仅从点光运动中提取丰富的视觉信息。有人指出，BM知觉是一种社会知觉的一部分，最近的许多行为研究表明，患有自闭症谱系障碍的儿童不擅长从点光运动中识别人类形态。虽然一些威廉姆斯综合征(WS)患者对BM知觉的研究已经阐明了BM的知觉特征，但关于BM加工的各个方面的研究还没有得到很好的解决。在本研究中，我们采用心理物理方法测量了低水平和高水平BM加工的阈值，发现BM知觉存在认知差距。

Biological motion (BM) is a visual phenomenon whereby our visual system can extract rich visual information from only point-light motion. It has been pointed out that the BM perception is part of a social perception and many recent behavioral studies have demonstrated that children with autism spectrum disorders are not good at detecting a human form from point-light motion. Although some studies in individuals with Williams syndrome (WS) on the BM perception have clarified the perceptual characteristics, it has not been well addressed the various aspects of BM processing. In the current study, we measured the thresholds for lower- and higher- levels of BM processing by adopting a psychophysical method and we found cognitive gaps in the BM perception.