Investigated how majority and minority arguments are positively or negatively responded to by group members and the effects of such responses on the polarization process. Demonstrated that reactions to minority arguments, not the forwarding of minority arguments per se, were significantly correlated with the degree of group polarization. (PD)

Focuses on personality as a predispositional factor which is predictive of the direction of both persuasive argumentation by group members and, subsequently, decision shifting. Tends to validate the value theory of polarization by showing that persuasive argumentation can mediate the effect of personality on decisional shifting. (PD)