Cooperativeness is conceptually similar to and strongly correlated with agreeableness in the five factor model of personality.
[2] Cloninger described cooperative individuals as socially tolerant, empathic, helpful, and compassionate, as opposed to intolerant, callous, unhelpful, and vengeful.
He compared cooperativeness to Carl Rogers' description of facilitative people who show unconditional acceptance of others, empathy with others' feelings, and willingness to help without a desire for selfish domination.
Cloninger regarded high cooperativeness as a sign of psychological maturity and of advanced moral development as described by Kohlberg.
[2] It is inversely correlated with Aggression-Hostility and psychoticism in Zuckerman's Alternative five model and the Eysenck Personality Questionnaire respectively.