A surprising comprehension-production asymmetry in subject-verb (SV) agreement acquisition has been suggested in the literature, and recent research indicates that task-specific as well as language-specific features may contribute to this apparent asymmetry across languages. The present study investigates when during development children acquiring Mexican Spanish gain competence with 3rd-person SV agreement, testing production as well as comprehension in the same children aged between 3;6 and 5;7 years, and whether comprehension of SV agreement is modulated by the sentential position of the verb (i.e., medial vs. final position). Accuracy and sensitivity analyses show that comprehension performance correlates with SV agreement production abilities, and that comprehension of singular and plural third-person forms is not influenced by the sentential position of the agreement morpheme. Issues of the appropriate outcome measure and the role of structural familiarity in the development of abstract representations are discussed.

文献中提出了在主谓（SV）协议获取中令人惊讶的理解产生不对称，最近的研究表明，特定于任务的特征以及特定于语言的特征可能导致这种明显的跨语言不对称。本研究调查儿童在发育过程中何时获得墨西哥西班牙语获得能力与 3 rd-person SV 一致性，在 3;6 和 5;7 岁之间的相同儿童中测试产生和理解，以及对 SV 一致性的理解是否受动词的句子位置（即，中间位置与最终位置）的调节. 准确性和敏感性分析表明，理解性能与 SV 协议产生能力相关，并且对单复数第三人称形式的理解不受协议语素的句子位置的影响。讨论了适当的结果测量问题和结构熟悉度在抽象表示的发展中的作用。