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.
It is known that by age 3, children track a speaker’s record of past accuracy and use it as a cue to current reliability. Through two different experiments, the Wesleyan researchers explored whether preschoolers’ judgments 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.