Two experiments tested two, three, and four year olds' ability to understand false beliefs. Results of both experiments support earlier claims that an understanding of false beliefs and deceptive ploys emerges at around age four. Two and three year olds can be led to produce such ploys but show no clear understanding of their effect. (GLR)

Examined three- to five-year-old children's understanding of pretense and deception in folktales in which a villain deceived his victim by pretending to be someone else. Found that the three-year-olds were able to follow the pretense but were not able to grasp the false belief integral to the deception. (MOK)

Explored the role of folktales of deception in developing 3- and 4-year-olds' theory of mind. Found that the story's deceptions elicit discussions that change over successive readings as the child shows increasing comprehension of the deceptions and decreasing need of parental support. Parent's and child's gender influenced frequency and…