 Soon after drawing conclusions about psychometric studies, Piaget started developing the clinical method of examination.The clinical method included questioning a child and carefully examining their responses – in order to observe how the child reasoned according to the questions asked – and then examining the child's perception of the world through their responses.Piaget recognized the difficulties of interviewing a child and the importance of recognizing the difference between "liberated" versus "spontaneous" responses (Mayer, 2005, p. 372).