Caffarra Sendy, Mendoza Martha, Davidson Doug
BCBL, Basque Center on Cognition, Brain and Language, Mikeletegi 69, 20009 Donostia, Spain.
BCBL, Basque Center on Cognition, Brain and Language, Mikeletegi 69, 20009 Donostia, Spain.
Brain Lang. 2019 Apr;191:9-16. doi: 10.1016/j.bandl.2019.01.003. Epub 2019 Feb 4.
The left anterior negativity (LAN) is an ERP component that has been often associated with morphosyntactic processing, but recent reports have questioned whether the LAN effect, in fact, exists. The present project examined whether the LAN effect, observed in the grand average response to local agreement violations, is the result of the overlap between two different ERP effects (N400, P600) at the level of subjects (n = 80), items (n = 120), or trials (n = 6160). By-subject, by-item, and by-trial analyses of the ERP effect between 300 and 500 ms showed a LAN for 55% of the participants, 46% of the items, and 49% of the trials. Many examples of the biphasic LAN-P600 response were observed. Mixed-linear models showed that the LAN effect size was not reduced after accounting for subject variability. The present results suggest that there are cases where the grand average LAN effect represents the brain responses of individual participants, items, and trials.
左前负波（LAN）是一种常与形态句法加工相关的事件相关电位成分，但最近的报告对LAN效应是否真的存在提出了质疑。本项目研究了在对局部一致性违反的总体平均反应中观察到的LAN效应，是否是在被试（n = 80）、项目（n = 120）或试验（n = 6160）层面上两种不同的事件相关电位效应（N400、P600）重叠的结果。对300至500毫秒之间的事件相关电位效应进行的被试、项目和试验分析表明，55%的参与者、46%的项目和49%的试验出现了LAN。观察到许多双相LAN - P600反应的例子。混合线性模型表明，在考虑了被试变异性后，LAN效应大小并未降低。目前的结果表明，在某些情况下，总体平均LAN效应代表了个体参与者、项目和试验的大脑反应。
