Williams P
Psychosom Med. 1977 Jan-Feb;39(1):44-7. doi: 10.1097/00006842-197701000-00006.
It is controversial whether or not veridical feedback is necessary to bring about increases in alpha activity in the feedback situation and has been suggested that the instructional variable may be a crucial determinant of outcome. In this experiment two groups of subjects were both given false feedback. One group was misled into believing that the feedback was contingent. Increases in alpha index occurred only in those subjects who believed that they were receiving contingent feedback, indicating that subjects knowledge and belief concerning the experiment were important in determining the outcome.
在反馈情境中，真实反馈对于引起阿尔法活动增加是否必要存在争议，并且有人提出指导变量可能是结果的关键决定因素。在本实验中，两组受试者都被给予了虚假反馈。一组被误导认为反馈是有条件的。只有那些相信自己收到有条件反馈的受试者的阿尔法指数有所增加，这表明受试者关于实验的知识和信念在决定结果方面很重要。
