Open Access

This paper presents results of corpus analytic investigations of children's use of referring expressions and considers possible implications of this work for questions relating to development of theory of mind. The study confirms previous findings that children use the full range of referring forms (definite and indefinite articles, demonstrative determiners, and demonstrative and personal pronouns) appropriately by age 3 or earlier. It also provides support for two distinct stages in mind-reading ability. The first, which is implicit and non-propositional, includes the ability to assess cognitive statuses such as familiarity and focus of attention in relation to the intended referent; the second, which is propositional and more conscious, includes the ability to assess epistemic states such as knowledge and belief. Distinguishing these two stages supports attempts to reconcile seemingly inconsistent results concerning the age at which children develop theory of mind. It also makes it possible to explain why children learn to use forms correctly be-fore they exhibit the pragmatic ability to consider and calculate quantity implicatures.