Electrophysiological evidence of implicit and explicit categorization processes
Electrophysiological evidence of implicit and explicit categorization processes
复制标题
DOI：
10.1006/jesp.2000.1430
复制
发表时间：
2000-11-01
影响因子：
3.5
通讯作者：
Cacioppo, JT
中科院分区：
文献类型：
--
作者：
Ito, TA;Cacioppo, JT
事件相关脑电位(ERPs)提供了分类过程的在线测量，被用来评估评估(积极和消极)和非评估(人和无人)维度的刺激的内隐和外显分类。参与者被暴露在同时在两个维度上不同的刺激下，但被明确指示只按其中一个进行分类。与前人的研究一致，事件相关电位的晚期正向电位(LPP)对被试的外显分类任务很敏感。然而，LPP也显示了非任务相关维度的内隐分类。此外，有证据表明存在内隐消极偏向，即消极刺激自发地比积极刺激获得更大的加工，以及在人/无人模拟中，包含人的刺激比没有人的刺激得到更大的加工。结果表明，自适应有益的内隐分类过程，由重要的近端刺激触发，服务于广泛的、跨情景的目标。(C)2000年学术出版社。
Event-related brain potentials (ERPs), which provide on-line measures of categorization processes, were used to assess the implicit and explicit categorization of stimuli along evaluative (positive and negative) and nonevaluative (people and no-people) dimensions. Participants were exposed to stimuli that simultaneously varied along both dimensions, but were explicitly instructed to categorize along only one of them. Consistent with prior research, the late positive potential (LPP) of the ERP was sensitive to participants' explicit categorization task. However, the LPP also revealed implicit categorization along the non-task-relevant dimension. Additionally, there was evidence of an implicit negativity bias in which negative stimuli spontaneously received greater processing than positive stimuli and a people/no-people analog in which stimuli containing people received greater processing than stimuli without people. Results suggest the operation of adaptively beneficial implicit categorization processes, triggered by significant proximal stimuli, serving broad, cross-situational goals. (C) 2000 Academic Press.