Relatives Children Say
Journal of Psycholinguistic Research
In an experiment designed to elicit restrictive relatives clauses, children (N = 28, aged 2:2-3:10) provided a corpus of communicatively appropriate relative clauses. In evaluating this corpus, we found that most children produced mostly adult relative clauses most of the time. We conclude that children's ability to represent the syntactic structure of the embedded clause is on target very early.
McDaniel, Dana; Mckee, Cecile; and Snedeker, Jesse, "Relatives Children Say" (1998). Faculty Publications. 33.