Errors of Commission in Constructions Involving Movement to the CP Domain

Abstract

In this overview paper, I discuss data from child languages available in the literature that instantiate errors of commission. I focus on three constructions involving movement to the left periphery of the clause: the production of aux-doubling (where more than one auxiliary verb, either followed by neg or not, is produced in yes/no and Wh-questions), medial Wh-questions (where two Wh-phrases are produced in long-distance Wh-questions), and the production of full resumptive DPs in the relativized position of the relative clause. I claim that these extra elements are not produced at random places, but precisely at the locations where copies (or traces) of the moved elements are claimed to occur. This is taken as an indication of children’s abstract grammatical knowledge.