Freud's psychosexual stages, Erikson's eight stages of moral development, the five stages of grief.

弗洛伊德的性心理阶段，埃里克森的道德发展八个阶段，悲伤的五个阶段。

Now, American psychologist Lawrence Kohlberg later expanded on Piaget’s model of cognitive development to incorporate stages of moral development.

现在，美国心理学家劳伦斯·科尔伯格后来扩展了皮亚杰的认知发展模型，将道德发展阶段纳入其中。