The interpretation of floating quantifiers in Japanese requires knowledge of hierarchical phrase structure. However, the input to children is insufficient or even misleading, as our analysis indicates. This presents an intriguing question on learnability: do children interpret floating quantifiers based on a structure-dependent rule which is not…

Recent studies on the acquisition of semantics have argued that knowledge of the universal quantifier is adult-like throughout development. However, there are domains where children still exhibit non-adult-like universal quantification, and arguments for the early mastery of relevant semantic knowledge do not explain what causes such…

Study of children who go through a "silent period" early in the course of second language development found that most of the children engaged in extensive private speech, including: repetition of others' utterances; recall and practice; creation of new linguistic forms; paradigmatic substitution; and rehearsal for overt social…