We report four act-out experiments testing the sensitivity of adults and three- to five-year-old children to the distinction between restrictive and non-restrictive relative clauses in English. Specifically, we test knowledge of the fact that restrictive relative clauses cannot modify a proper name head, and of the fact that relatives introduced…

Frazier and Clifton (2002) argue that a d(iscourse)-linked wh-phrase such as which boy attracts the reference of a pronoun in a subordinate clause. We translated Frazier and Clifton's materials from English into Romanian. Romanian is a pro-drop language in which null subjects are licensed by person and number agreement on the verb. We found that…