Abstract
Three experiments examined how change in minority size influenced information processing and attitude change. Experiment 1 showed that when strong rather than weak arguments were presented, a message attributed to an expanding rather than shrinking minority elicited more issue-relevant thoughts and more related attitude change in the argued direction. Experiment 2 showed more related attitude change in the argued direction when it was unlikely that expanding size was due to the shifting majority members’ self-interest. Experiment 3 replicated these findings. In addition, results indicated that change in size interacted differently with the majority than with minority status of the source: related issues remained largely unaffected in the case of majority support, whereas expanding minorities elicited more related attitude change in the argued direction.
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