The illusion of transparency, the tendency for people to overestimate how obvious their internal states appear to outside observers, was examined in 25 school-age children. While previous researchers studied undergraduate participants, we aimed to expand the developmental literature by investigating whether children exhibit the illusion of transparency in the same manner as undergraduates. We presented each child with three pleasant-tasting drinks and two unpleasant-tasting drinks. Two undergraduate observers and the children rated facial expressions after each sip. Our results supported our hypothesis with no illusion of transparency for the unpleasant drinks; however, an illusion was found for the pleasant drinks. The children\u27s inability to follow display rules may explain the absence of the illusion of transparency for the unpleasant condition
