'Theory of mind' and tracking speakers' intentions

Typical theory of mind tasks assess children's ability to attribute a false belief in order to predict or explain an action. According to these standard tasks, young children do not represent the independent (mistaken) beliefs of others until the fourth year-yet long before this, children are able to track speakers' intentions in order to learn new words. Might communication be a privileged domain for theory of mind? In the present study we explored pre-schoolers' ability to track a false belief in order to acquire a novel word. A puppet labeled a novel object in a false belief condition (contents of a box had been switched without her knowledge), and a true belief condition (contents switched in her presence). Children were significantly better at tracking the puppet's false belief in the word-learning task than in a standard false belief test. Possible reasons for this advantage are discussed, and the suggestion made that representation of mental states may emerge precociously in the service of communication.