Barber Horacio, Carreiras Manuel
Departamento de Psicología Cognitiva, Universidad de La Laguna, Tenerife, Spain.
Cortex. 2003 Jun;39(3):465-82. doi: 10.1016/s0010-9452(08)70259-4.
The aim of the current study was to explore the integration processes of gender and number morphological features, since it has been proposed that grammatical gender and number features might be associated with different strength with the word stem in lexical representation. Event related potentials (ERPs) were recorded using a 128-channel sensor net while twenty-four volunteers read Spanish word pairs and performed a syntactic judgment task. The word pairs which could agree or disagree in gender or number or in gender and number at the same time, were formed by a noun and an adjective (e.g. faro-alto [lighthouse-high]). A negativity around 400 msec with posterior distribution, which has been related to lexical integration processes, was found in response to both gender and number violations. No differences were found between gender disagreement, number disagreement and the double disagreement. Therefore, ERPs suggest that integration of gender and number features may not be different, and that the detection of disagreement may work under a binary state, since the double disagreement condition did not differ from the others. In addition, a subsequent component (identified as P3) showed delayed latencies in the gender disagreement condition as compared to the number disagreement condition, while the double disagreement conditions showed a shorter peak latency than the other two disagreement conditions and similar to the agreement condition. The variations in the latency of the P3 component, which has been related to categorization processes, suggest that these processes are quickly triggered by the accumulation of two incongruent as compared to one disagreement features, and that reanalysis is costlier in the case of gender disagreement as compared to the number disagreement.
本研究的目的是探讨性和数形态特征的整合过程，因为有人提出语法性和数特征在词汇表征中可能与词干有不同程度的关联。使用128通道传感器网络记录事件相关电位（ERP），同时24名志愿者阅读西班牙语单词对并执行句法判断任务。单词对由一个名词和一个形容词组成（例如faro-alto [灯塔-高的]），它们在性、数或性和数方面可能一致或不一致。在对性和数的违反情况的反应中，发现了一个约400毫秒的负波，其分布在后部，这与词汇整合过程有关。在性不一致、数不一致和双重不一致之间未发现差异。因此，ERP表明性和数特征的整合可能没有差异，并且不一致的检测可能在二元状态下进行，因为双重不一致条件与其他条件没有差异。此外，随后的一个成分（确定为P3）在性不一致条件下的潜伏期比数不一致条件下延迟，而双重不一致条件下的峰值潜伏期比其他两个不一致条件短，且与一致条件相似。与分类过程相关的P3成分潜伏期的变化表明，与一个不一致特征相比，两个不一致特征的积累会更快触发这些过程，并且与数不一致相比，性不一致情况下的重新分析成本更高。
