Membership role and subjective group dynamics: Impact on evaluative intragroup differentiation and commitment to prescriptive norms

Two studies examined participants’ evaluations of ingroup or outgroup normative and deviant members and changes in agreement with a prescriptive norm. In Experiment 1 (N = 51), the normative target was either a full or marginal ingroup or outgroup member, and the deviant was a full member. In Experiment 2 (N = 113), both targets were full or marginal members, or one was a full member and the other was marginal. As predicted, maximal upgrading of normative members and downgrading of deviant members, as well as endorsement of the norm, occurred when both targets were full ingroup members. In contrast, the deviant was derogated least and the deviant’s position was endorsed most when the deviant target was a full ingroup member and the normative target was a marginal ingroup member. Evaluations of normative and deviant ingroup members mediated the effects of their role on participants’ agreement with the norm.