altruism (Anna Freud)
A defense mechanism in which one learns to become helpful too avoid feelings of helplessness. Individuals learn they can satisfy their own egos as well as the demands of society.
Second stage of psychosexual development occurring between 18 months and 3 years. A fixation at this age can cause someone to be too rigid
The control or restrained exercised by the ego over the id to keep id impulses out of consciousness