Motives and groups (Ch. 3):

Need for affiliation (identity, membership, belonging)

Need for intimacy (relationships with others)

Need for achievement (get things done)

Need for power (influence and be influenced by others)

Need for resources (money, social support, access to tools)

Note: Members will differ as to the relative importance of these different needs, and the extent to which they are motivated to fulfill a particular need in a particular group. Conflicts can result from members having very different motives (some members want the team to win; others just want to have fun with friends). Sometimes, however, having the same motives can also promote conflict, because members are competing for the same thing (to be the best in the group at something, or to be the leader, for example).