Anger does not help achieve negotiation goals either: it reduces joint gains and does not boost personal gains, as angry negotiators do not succeed. Moreover, negative emotions lead to acceptance of settlements that are not in the positive utility function but rather have a negative utility. However, expression of negative emotions during negotiation can sometimes be beneficial: legitimately expressed anger can be an effective way to show one's commitment, sincerity, and needs. Moreover, although NA reduces gains in integrative tasks, it is a better strategy than PA in distributive tasks (such as zero-sum). In his work on negative affect arousal and white noise, Seidner found support for the existence of a negative affect arousal mechanism through observations regarding the devaluation of speakers from other ethnic origins. Negotiation may be negatively affected, in turn, by submerged hostility toward an ethnic or gender group.