Jean Piaget, the pioneering Swiss philosopher and psychologist, spent much of his professional life listening to children, watching children and poring over reports of researchers around the world who were doing the same.

• 让·皮雅杰，这位瑞士哲学和心理学先驱，将其职业生涯的大部分时间花在了倾听孩子们说话、观察他们游戏和潜心研究世界上其他从事同一工作的研究者的报告上。