Successful subject-verb agreement production requires retrieving the verbal forms that agree with the features of the subject head noun and not of other nouns in the sentence. We investigate, for the first time, the electrophysiological indexes of number attraction and word order during agreement production. Twenty-four Basque native speakers were tested while producing auxiliary verbs during sentence completion of transitive sentence preambles involving singular subjects and singular or plural objects in canonical (SOV) and non-canonical (OSV) structures. ERP results yielded a larger production P2 (pP2) amplitude for mismatching than matching objects in SOV sentences, and larger negativity for OSV than SOV in number matching condition. We explain these results in terms of distinct contributions of number and word order during correct agreement production, with the pP2 indexing morphosyntactic retrieval difficulty of agreement-inflection, and the frontal negativity reflecting word order effects during monitoring the correctness of the selected verbal form.

中文翻译：

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正确动词一致产生过程中数吸引和词序的ERP指标

成功的主谓一致产生需要检索与主语名词的特征一致而不与句子中其他名词的特征一致的动词形式。我们首次研究了协议产生过程中的数字吸引力和词序的电生理指标。在涉及规范 (SOV) 和非规范 (OSV) 结构中的单数主语和单数或复数宾语的及物句序言的句子完成期间，测试了 24 名以巴斯克语为母语的人，同时产生辅助动词。ERP 结果在 SOV 句子中产生比匹配对象更大的不匹配产生 P2 (pP2) 幅度，并且在数字匹配条件下 OSV 比 SOV 产生更大的负性。