The P300 as an electrophysiological probe of alcohol expectancy
The P300 as an electrophysiological probe of alcohol expectancy
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DOI：
10.1037/a0012873
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发表时间：
2008-08-01
影响因子：
2.3
通讯作者：
Donchin, Emanuel
中科院分区：
文献类型：
--
作者：
Fishman, Inna;Goldman, Mark S.;Donchin, Emanuel
基于酒精的测量表明，酒精预期影响酒精消费。为了将这些措施与言语输出之前的大脑活动联系起来，事件相关电位（ERP）的P300成分被用来检测违反个人持有的酒精预期。正如预测的那样，负酒精预期刺激引起的P300振幅与基于语言的措施上的积极/唤起酒精预期的认可呈正相关，这样一个人的积极/唤起预期越高，负酒精预期刺激引起的P300就越大。这些结果表明，基于语言的酒精期望值和期望的电生理探针的措施之间的一致性。虽然目前还不清楚这些预期过程是否是影响消费的决策途径的组成部分，但这些发现表明，这种处理可以在有意识的审议之外非常迅速地发生。
Language-based measures indicate that alcohol expectancies influence alcohol consumption. To relate these measures to brain actions that precede verbal output, the P300 component of the Event-related potentials (ERPs) was used to detect violations of individually held alcohol expectancies. As predicted, P300 amplitude elicited by negative alcohol expectancy stimuli was positively correlated with endorsement of positive/arousing alcohol expectancies on the language-based measures, such that the higher an individual's positive/arousing expectancies, the larger was the P300 elicited by negative alcohol expectancy stimuli. These results demonstrated concordance between language-based measures of alcohol expectancies and electrophysiological probes of expectancy. While it remains unknown whether these expectancy processes are integral to decision pathways that influence consumption, these findings suggest that such processing can occur very quickly outside of conscious deliberation.