With their wide eyes and innocent hearts, you might think it's easy to tell when a child is lying. Oh no it isn't. Not according to Leif Stromwall and colleagues, who found adults were useless at detecting when children were lying.

Thirty children aged between 11 and 13 were told they were going to be interviewed about one event that had really happened to them, and about another that they'd never experienced (an earlier questionnaire identified which life experiences the children had actually had). The children's task was to talk about both events as if they had experienced them both.