Hilary Barth, associate professor of psychology, associate professor of neuroscience and behavior, is the co-author of of “Preschoolers trust novel members of accurate speakers’ groups and judge them favorably,” published in the Quarterly Journal of Experimental Psychology, Issue 67, pages 872-883, in 2014. The paper is based on work from BA ’08/MA ’09 student Keera Bhandari’s thesis, and research by former undergraduates Kyle MacDonald ’10 and Jenn Garcia ’10, and former lab manager Elizabeth Chase.
By age 3, children track a speaker’s record of past accuracy and use it as a cue to current reliability.
In this study, the co-authors conducted two experiments. They explored whether preschoolers’ judgements about, and trust in, the accuracy of a previously reliable informant extend to other members of the informant’s group.
In Experiment 1, both 3- and 4-year-olds consistently judged an animated character who was associated with a previously accurate speaker more likely to be correct than a character associated with a previously inaccurate speaker, despite possessing no information about these characters’ individual records of reliability. They continued to show this preference one week later.
Experiment 2 presented 4- and 5-year-olds with a related task using videos of human actors. Both showed preferences for members of previously accurate speakers’ groups on a common measure of epistemic trust. This result suggests that by at least age 4, children’s trust in speaker testimony spreads to members of a previously accurate speaker’s group.
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