Proceedings of the Annual Meeting of the Cognitive Science Society

The recent upswing in both use and acceptance of they/them as a singular pronoun has led to it becoming potentially ambiguous between singular and plural interpretations in cases like “Alex went running with Liz. They fell down” in which Alex is known to use they/them pronouns. The current work uniquely investigates how children interpret they in these ambiguous cases. Specifically, 5-year-olds, 8-year-olds, and an adult control group underwent a partial replication of Arnold et al. (2021), wherein they answered comprehension questions regarding a series of two-sentence stories. Results show that children can successfully map the pronoun they onto a singular individual when there are no plural competitors and that they interpret ambiguous they similarly to adults, although 5-year-olds interpret this pronoun as singular more often than 8-year-olds. These findings indicate that older children potentially undergo a form of overregularization of they due to grammatical rules enforced at school.