Foremost is the work of Jean Piaget, the Swiss psychologist who pioneered the field and whose theories have had an unparalleled impact on education, especially in Europe.

• 皮亚杰，这位瑞士心理学家，是这一领域的开拓者；在教育领域，特别是在欧洲的教育领域，他的理论所产生的影响无人能比。