P300 and feedback provided by absence of the stimulus.
P300 and feedback provided by absence of the stimulus.
复制标题
P300 和缺乏刺激时提供的反馈。
DOI：
10.1111/j.1469-8986.1981.tb03034.x
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发表时间：
1981
期刊：
影响因子：
3.7
通讯作者：
Macar,F
中科院分区：
文献类型：
--
作者：
Ruchkin,DS;Sutton,S;Munson,R;Silver,K;Macar,F
该实验涉及发射（响应于没有刺激）和诱发（响应于出现刺激）P300 的功能等价问题。受试者尝试通过繁殖方法估计 600 毫秒的时间间隔。受试者被告知时间间隔是否被低估或高估，以及估计误差幅度是否在限制内（“正确”估计，正反馈）或超过限制（“不正确”，负反馈）。该反馈通过单个事件或两个事件的组合来呈现。每个事件都由一对刺激组成。无论传递的是正反馈还是负反馈，也无论反馈是由单个事件还是两个事件的组合传递，发射的以及诱发的、早期额中央和晚期顶叶 P3OO 都是由反馈事件引起的。此外，在反馈事件的第一个刺激之后发现了似乎是正的慢波，此时该刺激强度较低，表明低估了。另一个条件（高强度、高估）之后是 CNV。由于这些慢波发现是偶然的，因此无法进行平衡来确定强度（低与高）或信息（低估与高估）是否造成了差异。
This experiment is concerned with the issue of functional equivalence ofemitted(in response to ahsence of a stimulus) andevoked(in response to presentation of a stimulus) P300s. Subjects attempted to estimate a 600‐msec time interval hy the method of reproduction. Subjects were informed whether the time interval was under‐ or overestimated and whether the estimation error magnitude was within a limit (“correct” estimate, positive feedback) or exceeded the limit (“incorrect,” negative feedback). This feedback was presented by means of either a single event or a combination of two events. Each event consisted of a pair of stimuli.Emitted, as well as evoked, early fronto‐central and late parietal P3OOs were elicited by the feedback event regardless of whether positive or negative feedback was delivered, and regardless of whether feedback was delivered by a single event or by the combination of two events. In addition, what appears to be a positive Slow Wave was found following the first stimulus ofthe feedback event when this stimulus was low intensity indicating an underestimation. The other condition (high intensity, overestimation) was followed by a CNV. Since these slow wave findings were serendipitous, counterbalancing was not available to determine whether intensity (low vs high) or information (underestimation vs overestimation) was responsible for the difference.