(Need for Affiliation) is a term that was popularised by David McClelland
and describes a person's need to feel a sense of involvement and 'belonging' within a social group. However, it should be recognised that McClellend's thinking was strongly influenced by the pioneering work of Henry Murray
who first identified underlying psychological human needs and motivational processes (1938). It was Murray who set out a taxonomy of needs, including Achievement, Power and Affiliation - and placed these in the context of an integrated motivational model. People with a high need for affiliation require warm interpersonal relationships and approval from those with whom they have regular contact. People who place high emphasis on affiliation tend to be supportive team members, but may be less effective in leadership positions.
See also: N-Pow, N-Ach