This study extended an existing crosslinguistic model of verb-marking errors in children's early multiword speech (MOSAIC) by adding a novel mechanism that defaults to the most frequent form of the verb where this accounts for a high proportion of forms in the input. Our simulations showed that the resulting model not only provides a better…

Reaction of the target language speaker to the second language learner's errors may play an important role in developing awareness of norms of correctness. A model for corrective feedback has been developed. Its use helps isolate ambiguities, highlights features of corrective interaction effective in eliciting correct performance. (CHK)