Competence and performance in child language: are children really competent to judge?

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Abstract
The notion of competence as it applies to child language is critically assessed in the light of evidence collected from a number of linguistic performances which share the same word-order rule. These performances – production, comprehension, judgment and correction – parallel Moravcsik's (1969) formulation of Chomsky's criteria for tacit knowledge of a rule, i.e. competence. It was found that these criteria are not all satisfied until the child is four or five years old, as the performances appear at very different points in time. Alternative criteria for tacit knowledge are suggested, with specific models of each performance replacing a general model of competence for early child speech.

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