Comparative Advertising Effectiveness: The Role of Involvement and Source Credibility

Previous research on the persuasive impact of comparative advertising has produced inconsistent results. Consequently, researchers have suggested lack of credibility and the need for higher involvement as two problems which might impede the persuasive impact of comparative advertising. However, virtually no empirical evidence comparing the effects of comparative advertising to non-comparative advertising when different levels of involvement are activated exists. In addition, little research has examined whether source credibility enhances the persuasive impact of comparative advertising. Attribution theory provided the framework for the experiment reported in this paper. Experimental results suggest that when higher involvement is activated and a source of higher credibility is included in the advertisements, comparative advertising for a new brand has a more positive effect on purchase intentions than non-comparative advertising.