亲合需要

结果指出，高合作需求动机的学生在个别学习的情境下，显著地低于其他各组的学习成效。

Maslows need hierarchy theory

A friend in need is a friend indeed

need

need for nurturance

Revision of amputated stump (need osteoplasty)--thigh, leg, arm, forearm

psychological need

mutual need

hierarchy of need【劳经】