English derivational suffix frequency and children's stress judgments.

Considering the importance of word and stem frequency in the adult lexical processing literature, and the effect of input frequency on children's acquisition of words (Tardif, Shatz, and Naigles, 1997), it was hypothesized that children's acquisition of English morphologically conditioned stress alternations would be affected by the frequency with which children were exposed to different stress-changing suffixes (e.g., -tion, -ity, and -ic).