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Language development requires children to learn how to understand ambiguous pronouns, as in Panda Bear is having lunch with Puppy. He wants a pepperoni slice. Adults tend to link he with Puppy, the prior grammatical subject, but young children either fail to exhibit this bias (Arnold, Brown-Schmidt & Trueswell, 2007) or do so more slowly than adults (Hartshorne et al., 2015a; Song & Fisher, 2005). In the current study, we test whether language exposure affects this bias in elementary-school-age children. Children listened to stories like the one above, and answered questions like “Who wants a pepperoni slice?” which reveal their pronoun interpretation. Individual variation in the rate of selecting the subject character correlated with measures of print exposure, such that children who read more are more likely to follow the subject bias. This is the first study to establish that print exposure affects spoken pronoun comprehension in children.

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Abstract:An unstudied source of linguistic variation is the use of discourse-appropriate language. Sometimes individuals use linguistic devices (anaphors, connectors) to connect utterances to the discourse context, and sometimes not. We asked how this variation is related to utterance planning, using eyetracking with a narrative production task. Participants saw picture pairs depicting two events. They heard a description of the first event (Context picture), then added to the story by describing the second event (Target picture). We found that one group of participants produced utterances that connected with the discourse context (Context-Users), using pronouns/zeros and connectors (and/then) as appropriate, while another group consistently used definite NP descriptions and virtually no connectors (Context-Ignorers). Eyetracking measures reflected utterance planning within a discourse context: all participants shifted their attention from the Context picture to the Target picture throughout a trial. We also observed group differences: Context-Users directed their attention in a more systematic way than Context-Ignorers. At trial onset, Context-Users looked more at the Context picture than Context-Ignorers. Right before speaking, they looked more at the Target picture than Context-Ignorers. The Context-Users also had shorter latency to begin speaking. This study provides a first step toward characterizing individual differences in terms of utterance planning.