Determinant Factors of P300 Amplitude in Guilty Knowledge Tests
Determinant Factors of P300 Amplitude in Guilty Knowledge Tests
复制标题
犯罪知识测试中 P300 幅度的决定因素
DOI：
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发表时间：
2007
期刊：
影响因子：
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通讯作者：
M. Miyatani
中科院分区：
文献类型：
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作者：
K. Kubo;H. Nittono;M. Miyatani
有人认为，已知影响P300振幅的实验变量可以用三个一般因素来描述：主观概率、刺激意义和信息传递。本研究基于这一三元模型，探讨了有罪知识测试（GKT）中决定P300振幅的因素。20名大学生进行了一项三刺激视觉古怪的任务，使用的话。一半的参与者通过模拟犯罪来增加不常见的非目标词的重要性，而另一半则没有。仅在模拟犯罪组中，关键性项目（不常见的非目标词）的P300振幅大于非关键性项目（常见的非目标词）。振幅差异仍然显着的双任务条件下，其中参与者进行了听觉辨别任务的同时，视觉古怪的任务。这些结果表明，P300振幅较大的关键刺激GKT主要是因为这些刺激更有意义，而不是因为刺激被视为一个罕见的刺激类别的成员。此外，注意力分散似乎并没有消除关键和非关键项目之间的幅度差异。（Japanese Journal of Physiological Psychology and Psychophysiology，25（3）：267-275，2007.）
It has been suggested that the experimental variables known to affect P300 amplitude can be described by three general factors: subjective probability, stimulus meaning, and information transmission. Based on this triarchic model, this study investigated the factor that determines P300 amplitude in guilty knowledge tests (GKTs). Twenty university students performed a three-stimulus visual oddball task using words. Half of the participants enacted a mock crime to increase the significance of infrequent nontarget words, whereas the other half did not. P300 amplitude was larger for critical items (infrequent nontarget words) than for noncritical items (frequent nontarget words) only in the mock-crime group. The amplitude difference remained significant in a dual-task condition wherein the participants performed an auditory discrimination task simultaneously with the visual oddball task. These results suggest that P300 amplitude is larger for critical stimuli in GKTs mainly because these stimuli are more meaningful and not because the stimuli are perceived as members of a rarer stimulus category. Moreover, attentional distraction does not appear to eliminate the amplitude difference between critical and noncritical items. (Japanese Journal of Physiological Psychology and Psychophysiology, 25(3) : 267-275, 2007.)
影响因子：
3.7
作者：
Katayama, J;Polich, J
通讯作者：
Polich, J