Glazebrook Cheryl M, Elliott Digby, Lyons James
Department of Kinesiology, McMaster University, 1280 Main Street West, Hamilton, Ont., Canada L8S 4K1.
Conscious Cogn. 2008 Mar;17(1):203-9. doi: 10.1016/j.concog.2007.03.001. Epub 2007 Apr 12.
When participants make judgments about the onset of self-initiated movements they typically report the movement occurred earlier than it had [Obhi, S. S., & Haggard, P. (2004). Free will and free won't. American Scientific, 92, 358-365.]. One interpretation is that feed-forward processes lead to awareness of the movement prior to execution. Because individuals with autism experience reduced preparatory activity prior to a voluntary movement, the present study sought to determine whether these anticipatory biases are exhibited by persons with autism. Participants watched a dot move in a circle and pressed the spacebar any time after one revolution. A tone either followed the participants' voluntary movement or was computer generated. Participants in both groups made anticipatory judgements regarding movement initiation ( approximately 100 ms). When the movement and tone occurred together this anticipatory bias was also present, regardless of which event participants focused on. Individuals with autism appear to have access to a similar representation of voluntary movements, however this representation may be more variable.
当参与者对自我发起的动作的开始进行判断时，他们通常报告动作发生的时间比实际发生时间更早[奥布希，S.S.，& 哈格德，P.（2004年）。自由意志与非自由意志。《美国科学家》，92卷，358 - 365页。]。一种解释是，前馈过程导致在动作执行之前就产生动作意识。由于自闭症患者在自主运动之前的准备活动减少，本研究旨在确定自闭症患者是否也表现出这些预期偏差。参与者观看一个点在圆圈中移动，并在一圈之后的任何时间按下空格键。一个音调要么跟随参与者的自主动作，要么由计算机生成。两组参与者都对动作开始做出了预期判断（大约提前100毫秒）。当动作和音调同时出现时，这种预期偏差也存在，无论参与者关注的是哪个事件。自闭症患者似乎能够获得类似的自主运动表征，然而这种表征可能更具变异性。
