title: A story for Larry.
authors.affiliation: Graduate School of Education, Harvard University.
authors.forename: E
authors.initials: E
authors.lastname: Duckworth
authors.forename: J
authors.initials: J
authors.lastname: Cleary
mesh_terms: D002648:Child; D003299:Cooperative Behavior; D006801:Humans; D008297:Male; D009014:Morals; D002666:Psychology, Child