Selectively prompting speech repairs in stages I to V: a technique for investigating early metalinguistic abilities.

When children aged from 1;6 to 3;6 made errors in relation to targeted morphemes within grammatically obligatory contexts, a prompt of "Pardon?" was given. Morpheme repair rates increased with linguistic proficiency, and with target morpheme mastery. The selective use of prompted repairs appears to be a useful technique for assessing rudimentary abilities to monitor grammatical form within very young children.