A joint Canadian-Chinese study indicates that children learn to tell social lies around age four!
They asked a group of preschool children ages 3 to 6 to rate drawings by children and adults they knew, as well as strangers. The preschoolers judged the artwork both when the artist was present, and when he or she was absent. The three-year-olds were completely honest, and remained consistent in their ratings; it didn’t matter who drew it, or whether the person was in the room. Five- and six-year-olds gave more flattering ratings when the artist was in front of them. They flattered both strangers and those they knew (although familiar people got a higher dose of praise). Among the four-year-olds, half the group displayed flattery while the other half did not. This supports the idea that age four is a key transitional period in children’s social understanding of the world.