Fig. 3.

Examples of the story-card sequences used to assess understanding in the (a) false-belief and (b) true-belief scenarios. In (a), a boy’s toy train is moved from under a bed to a toy box while he is eating in the next room. Participants who selected the false-belief card (looking under the bed) to complete the story indicated a mature understanding of the boy’s false belief. In (b), the boy watches while his brother places the train into the toy box. In this condition, participants who selected the true-belief card (looking in the toy box) to complete the story indicated that they understood what both they and the boy had seen to be true.