Interface Delay is a theory of syntactic development, which attempts to explain an array of constructions that are slow to develop, which are characterized by being sensitive to discourse-pragmatic considerations of the type associated with the natural semantic class of definites. The theory claims that neither syntax itself, nor the discourse-pragmatic abilities related to executive function and theory of mind themselves are slow to develop. Rather, the claim is that the nexus or interface between the two cognitive domains is slow to develop. We review the development of subjects in child Spanish as an example of this delayed growth trajectory. Further, we review evidence that a delay in the development of tense causes concomitant delays in the seemingly unrelated phenomena of non-nominative case subject pronoun use and un-inverted wh- questions.

中文翻译：

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接口延迟

接口延迟是一种句法发展理论，它试图解释一系列发展缓慢的结构，其特点是对与自然语义定式相关的类型的语用语用考虑敏感。该理论声称，无论是句法本身，还是与执行功能和心理理论本身相关的话语-语用能力都发展缓慢。相反，声称这两个认知领域之间的联系或界面发展缓慢。我们回顾了儿童西班牙语科目的发展，作为这种延迟增长轨迹的一个例子。此外，我们审查的证据表明，时态发展的延迟导致非主格主语代词使用和未倒置的 wh 问题的看似无关的现象伴随延迟。