Cooperativeness is a personality trait that concerns how much a person is generally agreeable in their relations with other people as opposed to aggressively self-centered and hostile.It is one of the "character" dimensions in Cloninger's Temperament and Character Inventory. Cloninger described it as relating to individual differences in how much people identify with and accept others. Cloninger's research found that low cooperativeness is associated with all categories of personality disorder. Cooperativeness is conceptually similar to and strongly correlated with agreeableness in the five factor model of personality. Source: Wikipedia (en)