Effects of Omitting Conclusions in Advertisements to Involved and Uninvolved Audiences

Abstract

In two experiments, the authors manipulated the audience's level of involvement in processing an advertisement and whether the advertisement was open-ended (i.e., did not include an explicit conclusion) or closed-ended. Results of both experiments show the open-ended advertisement to be superior to the closed-ended one for an involved audience in terms of brand attitude, purchase intention, and choice, whereas only a small and statistically insignificant difference between the two types of advertisements is found for the uninvolved audience. Moreover, the second experiment shows that the choice advantage of the open-ended ad for the involved audience persisted when measured one week later.