An extension of inoculation theory, controverted belief, was investigated by manipulating previous attack as part of a group discussion situation in which actual defense of an issue was considered essential for having an inoculating effect. The experimental groups were equally immunized against verbal attacks. (Author)

This study was designed to test two alternative explanations for the foot-in-the-door phenomenon. It was found that the issue similarity variable had no effect on compliance. However, within the similar issue condition there was a cumulative effect of persuasive message and small request. (Author)