Sixty-sir male Japanese students verbally interacted with a confederate opponent, who expressed unreasonable requests politely or impolitely. Half of the participants was pressed to respond immediately, while the other half was not. Personality variables were found to determine the participants' responses to the conflict in interactions with the situational variables; that is, verbal aggressiveness increased hostile responses only when the confederate behaved in an impolite manner, and self-monitoring increased integrative responses only when the participants were not pressed to respond quickly.