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1
Novel Word Learning at 21 Months Predicts Receptive Vocabulary Outcomes in Later Childhood
In: J Child Lang (2019)
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Reasoning about knowledge: Children’s evaluations of generality and verifiability
Abstract: In a series of experiments, we examined 3- to 8-year-old children’s (N = 223) and adults’ (N = 32) use of two properties of testimony to estimate a speaker’s knowledge: generality and verifiability. Participants were presented with a “Generic speaker” who made a series of 4 general claims about “pangolins” (a novel animal kind), and a “Specific speaker” who made a series of 4 specific claims about “this pangolin” as an individual. To investigate the role of verifiability, we systematically varied whether the claim referred to a perceptually-obvious feature visible in a picture (e.g., “has a pointy nose”) or a non-evident feature that was not visible (e.g., “sleeps in a hollow tree”). Three main findings emerged: (1) Young children showed a pronounced reliance on verifiability that decreased with age. Three-year-old children were especially prone to credit knowledge to speakers who made verifiable claims, whereas 7- to 8-year-olds and adults credited knowledge to generic speakers regardless of whether the claims were verifiable; (2) Children’s attributions of knowledge to generic speakers was not detectable until age 5, and only when those claims were also verifiable; (3) Children often generalized speakers’ knowledge outside of the pangolin domain, indicating a belief that a person’s knowledge about pangolins likely extends to new facts. Findings indicate that young children may be inclined to doubt speakers who make claims they cannot verify themselves, as well as a developmentally increasing appreciation for speakers who make general claims.
Keyword: Article
URL: http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4648649/
https://doi.org/10.1016/j.cogpsych.2015.08.007
http://www.ncbi.nlm.nih.gov/pubmed/26451884
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