Five-year-olds' sensitivity to knowledge discrepancies about object identity during online language comprehension

In everyday communication, children experience situations where their knowledge or perspectives differ from those of their communicative partner. The current study examined this issue in the context of real-time language comprehension, focusing on 5-year-old children's ability to manage knowledge discrepancies about the identity of mutually visible objects. In Experiment 1, we examined 5-year-olds' ability to manage privileged knowledge about an object's identity. Using a referential communication task, we tested children (N = 60) in either a shared knowledge condition, where both the child and the speaker knew the identity of a visually misleading object (e.g., a candle that looks like an apple), or a privileged knowledge condition, where only the child knew the identity of the visually misleading object. Of interest was whether children could suppress private knowledge while processing a phonologically related word (e.g., "Look at the candy"). Results showed that children did not inhibit this knowledge during the early moments of referential interpretation. In Experiment 2 (N = 30), we contrasted the privileged knowledge condition in Experiment 1 with the more traditional scenario used to test common ground use, where the child knows the speaker cannot see certain display objects. Results confirmed a stronger ability to manage discrepancies in the latter case. Together, the findings demonstrate differences in children's ability to manage distinct types of knowledge discrepancies during real-time language comprehension.