The effect of stimulus discriminability on stimulus-preceding negativities prior to instructive and feedback stimuli
The effect of stimulus discriminability on stimulus-preceding negativities prior to instructive and feedback stimuli
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DOI：
10.1016/s0301-0511(98)00047-7
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发表时间：
1999-05-01
影响因子：
2.6
通讯作者：
Aihara, Y
中科院分区：
文献类型：
--
作者：
Kotani, Y;Aihara, Y
在时间估计任务中记录刺激前负性（SPN），以比较前指令SPN和前反馈SPN。在任务中，其中的声音音调后3秒的自愿运动，（a）刺激的可辨别性（容易和困难）的水平，和（B）的声音音调（反馈和指令）的信息内容进行了操纵。在右半球的教学前SPN往往是更大的困难下比容易水平的可辨别性，但差异只是轻微的显着。相比之下，右半球的前反馈SPN显着大于下容易比困难水平的可辨别性。这些结果表明，刺激的可辨别性水平的影响不同的前指令和前反馈的SPN，这是可能的，前反馈和前指令SPN不具有相同的功能意义。(C)1999 Elsevier Science B.V.保留所有权利。
Stimulus-preceding negativity (SPN) was recorded in time estimation tasks that allowed the pre-instruction SPN and the pre-feedback SPN to be compared. In the task in which an acoustic tone was presented 3 s after a voluntary movement, (a) the level of stimulus discriminability (easy and difficult), and (b) the information content of the acoustic tone (feedback and instruction) were manipulated. The pre-instruction SPN over the right hemisphere tended to be larger under the difficult than under the easy level of discriminability, but the difference was only marginally significant. In contrast, the pre-feedback SPN over the right hemisphere was significantly larger under the easy than under the difficult level of discriminability. These findings suggest that the level of stimulus discriminability influences the pre-instruction and the pre-feedback SPN differently, and that it is probable that the pre-feedback and the pre-instruction SPN do not have the same functional significance. (C) 1999 Elsevier Science B.V. All rights reserved.