“…This second-order false belief understanding is known to develop well into middle childhood (Baron-Cohen, O'Riordan, Stone, Jones, & Plaisted, 1999). From around 6-7 years of age children can understand false beliefs about social, not just physical, stimuli (e.g., Nguyen & Frye, 1999;Symons, McLaughlin, Moore, & Morine, 1997), and begin to understand about false emotions as well as false beliefs (Harris, Johnson, Hutton, Andrews, & Cooke, 1989).…”