Marí-Beffa Paloma, Catena Andrés, Valdés Berenice, Cullen Doug, Houghton George
School of Psychology, University of Wales Bangor, Penrallt Road, LL57 2AS, Bangor, Gwynedd, UK.
Brain Res. 2007 May 25;1147:209-12. doi: 10.1016/j.brainres.2007.01.124. Epub 2007 Feb 3.
In two recent papers, Heil et al. [Heil, M., Rolke, B., Pecchinenda, A., 2004. Automatic semantic activation is no myth: semantic context effects on the N400 in the Letter-Search task in the absence of response time effects. Psychol. Sci., 15 (12), 852-857] and Marí-Beffa et al. [Marí-Beffa, P., Valdés, B., Cullen, D.J.D., Catena, A., Houghton, G., 2005. ERP analyses of task effects on semantic processing from words. Cogn. Brain Res., 23, 293-305] found opposite ERP effects of semantic priming following letter search (as measured by the N400). Dombrowski and Heil [Dombrowski, J.H., Heil, M., 2006. Semantic activation, letter search and N400: a reply to Marí-Beffa, Valdés, Cullen, Catena and Houghton (2005). Brain Res., 1073-1074, 440-443] have argued that the N400 modulation associated to semantic priming found by Marí-Beffa et al. [Marí-Beffa, P., Valdés, B., Cullen, D.J.D., Catena, A., Houghton, G., 2005. ERP analyses of task effects on semantic processing from words. Cogn. Brain Res., 23, 293-305] is due to the use of electrode Cz as reference, rather than to the task manipulation being studied (letter search vs. categorisation). In the current article we argue that the conclusions of Dombrowski and Heil are mistaken and are due in part on a misreading of Marí-Beffa et al. [Marí-Beffa, P., Valdés, B., Cullen, D.J.D., Catena, A., Houghton, G., 2005. ERP analyses of task effects on semantic processing from words. Cogn. Brain Res., 23, 293-305]. We argue instead that the differences between the results of Heil et al. [Heil, M., Rolke, B., Pecchinenda, A., 2004. Automatic semantic activation is no myth: semantic context effects on the N400 in the Letter-Search task in the absence of response time effects. Psychol. Sci., 15 (12), 852-857] and Marí-Beffa et al. [Marí-Beffa, P., Valdés, B., Cullen, D.J.D., Catena, A., Houghton, G., 2005. ERP analyses of task effects on semantic processing from words. Cogn. Brain Res., 23, 293-305] are largely due to differences in experimental method and procedure, rather than to the technique used for the ERP analysis.
在最近的两篇论文中,海尔等人[海尔,M.,罗尔克,B.,佩奇南达,A.,2004年。自动语义激活并非虚构:在无反应时间效应的字母搜索任务中语义语境对N400的影响。《心理科学》,15(12),852 - 857]以及马里 - 贝法等人[马里 - 贝法,P.,巴尔德斯,B.,卡伦,D.J.D.,卡泰纳,A.,霍顿,G.,2005年。从单词对语义加工的任务效应的ERP分析。《认知脑研究》,23,293 - 305]发现了字母搜索后语义启动的相反ERP效应(通过N400测量)。邓布罗夫斯基和海尔[邓布罗夫斯基,J.H.,海尔,M.,2006年。语义激活、字母搜索与N400:对马里 - 贝法、巴尔德斯、卡伦、卡泰纳和霍顿(2005年)的回应。《脑研究》,1073 - 1074,440 - 443]认为,马里 - 贝法等人[马里 - 贝法,P.,巴尔德斯,B.,卡伦,D.J.D.,卡泰纳,A.,霍顿,G.,2005年。从单词对语义加工的任务效应的ERP分析。《认知脑研究》,23,293 - 305]发现的与语义启动相关的N400调制是由于使用电极Cz作为参考,而非所研究的任务操作(字母搜索与分类)。在本文中,我们认为邓布罗夫斯基和海尔的结论是错误的,部分原因是对马里 - 贝法等人[马里 - 贝法,P.,巴尔德斯,B.,卡伦,D.J.D.,卡泰纳,A.,霍顿,G.,2005年。从单词对语义加工的任务效应的ERP分析。《认知脑研究》,23,293 - 305]的误读。相反,我们认为海尔等人[海尔,M.,罗尔克,B.,佩奇南达,A.,2004年。自动语义激活并非虚构:在无反应时间效应的字母搜索任务中语义语境对N400的影响。《心理科学》,15(12),852 - 857]和马里 - 贝法等人[马里 - 贝法,P.,巴尔德斯,B.,卡伦,D.J.D.,卡泰纳,A.,霍顿,G.,2005年。从单词对语义加工的任务效应的ERP分析。《认知脑研究》,23,293 - 305]结果之间的差异很大程度上是由于实验方法和程序的不同,而非ERP分析所使用技术的差异。