 He realized the difficulty of studying children's thoughts, as it is hard to know if a child is pretending to believe their thoughts or not.Piaget was the pioneer researcher to examine children's conversations in a social context – starting from examining their speech and actions – where children were comfortable and spontaneous (Kose, 1987).After conducting many studies, Piaget was able to find significant differences in the way adults and children reason; however, he was still unable to find the path of logic reasoning and the unspoken thoughts children had, which could allow him to study a child's intellectual development over time (Mayer, 2005).