Minority versus majority influence and uncertainty orientation: processing persuasive messages on the basis of situational expectancies. 
The authors examined the effects of uncertainty orientation on processing persuasive messages from minority sources versus majority sources.  The authors gave participants a proattitudinal or counterattitudinal message that either a numerical majority or a numerical minority endorsed and that contained strong or weak arguments.  In support of the hypothesis that was related to message scrutiny, uncertainty-oriented individuals engaged in greater message scrutiny when the Source-Position (i.e., minority/majority-pro/con) pairing was imbalanced (in majority-con, minority-pro conditions) than when it was balanced (in majority-pro, minority-con conditions).  Certainty-oriented participants showed the opposite pattern, scrutinizing the message more when the situation was balanced than when the situation was imbalanced.  Support for the hypothesis that was related to nonsystematic processing was less clear because the majority appeared to have played a greater role in accounting for the aforementioned interaction than did the minority.  Additional analyses supported this interpretation.  However, in all cases, individual differences in uncertainty orientation moderated strength and direction of information processing.