The syntactic structure of sentences in which a new word appears may provide listeners with cues to that new word's form class. In English, for example, a noun tends to follow a determiner ("a"/"an"/"the"), while a verb precedes the morphological inflection [ing]. The presence of these markers may assist children in…

Speakers must command different linguistic registers to index various social-discourse elements, including the identity of the addressee. Previous work found that English-learning children could link registers to appropriate addressees by 5 years. Two experiments found that better cues to the linguistic form or to the social meaning of register…