Positive versus negative comparative advertising

Two studies examined cognitive responses to comparative advertising that was valenced, i.e., was either negative or positive. Negative comparative advertising featured the advertised brand derogating the comparison brand (I'm OK, you're not OK). Positive comparative advertising claimed superiority over the comparison brand in a nonderogatory manner (You're OK, I'm more OK). Subjects were exposed to either a negative comparative ad or a positive comparative ad. In study 1, the ad featured either a high or low share advertised brand and either a high or low share comparison brand while in study 2, the ad featured advertised and comparison brands with either a strong or a weak reputation. Across both studies, it was found that negative comparative advertising evoked significantly higher counterargumentation and lower claim acceptance than its positive counterpart. Also, when the advertised brand had a high share relative to the comparison brand, counterargumentation was lower and claim acceptance was higher vis-a-vis when the advertised brand had a low share relative to the comparison brand. Findings pertaining to brand reputation were mixed. Managerial and future research implications of the findings are discussed.