Two-Sided versus One-Sided Celebrity Endorsements: The Impact on Advertising Effectiveness and Credibility

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Abstract
This study examines celebrity endorsements in advertising using a two-sided framework, in terms of the internalization and identification processes of social influence as discussed by Kelman (1961). The two-sided execution was designed to increase a viewer's perception of advertiser credibility by including a discussion of a limitation of the advertised service. Results show that when compared to a traditional one-sided celebrity endorsement, the two-sided communication elicited significantly higher advertising credibility and effectiveness ratings, higher evaluation of the sponsor in terms of perceived overall quality of service, as well as a significantly greater intention to use the advertised service. These findings suggest that the use of a celebrity appeal in a two-sided form is an effective advertising strategy.