| Distinguished between dyad triad | |
| Was inspired by the work of Piaget. Concluded that given the proper experience and stimulation, children go through a sequence of six stages of moral reasoning. This person has been criticized for basing his model of human development on the male experience | |
| 8 stages of psychosocial development: Nurture, shame, initiative, focus shifts from family to school, ID confusion, relationships, social contribution, and lastly finding meaning at the end of one's life. | |
| Criminals bore a greater resemblance to apes than non-criminals. |