Abstract
Groups who have been familiarized with the topic of a communication or who have had their opinion on a topic tapped by questionnaire, have yielded primacy effects when confronted with opposed communications on the same topic. Two intact groups of Ss, both of which were familiar with the two topics of the communications, were exposed to opposed arguments on various aspects of these topics. There were no significant order effects, nor did either group change opinion regarding their position on the topic. Since no primacy effect resulted, it is concluded that intact groups familiar with a topic may also be committed to a particular position or opinion regarding that topic and hence yield no order effects of any kind.

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