Children between three and five years of age engaged in a procedure in which a puppet competitor chose an object which the children preferred. Fewer than 30 percent of three year olds but more than 80 percent of five year olds knew how to conceal their preference from the competitor. (BC)

In one experiment, autistic children continued to fail a task that involved strategic deception when no opponent was present. In a second experiment that involved reaching for an object under direct and detour conditions, autistic children had greater difficulty with the task than did nonautistic, mentally handicapped children. Cites advantages…

To determine whether children younger than four have an authentic theory of mind, studies relying on deceptive hiding measures for indexing false belief were carried out. Children accurately anticipated the impact of deceptive strategies on the behavior and belief of opponents and used information management to help and hinder others' efforts. (BC)