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The purpose of this paper is to explore the application of advertising variation and repetition strategies in the context of communicating about social issues in least developed countries (LDCs).

Study 1 used a between-subjects experimental study using 106 students which were exposed to either the varied advertising condition (a negative appeal followed by a positive appeal or vice versa) or repetition condition (two negative appeals). In Study 2, a total of 111 students from Tilburg University and 95 students from Addis Ababa University participated in the study. A random ordering of experimental envelopes assigned the students to one of the following message order conditions (negative appeal–positive appeal, negative appeal–negative appeal, positive appeal–positive appeal and positive appeal–negative appeal).

Study 1 shows that for many social issues, an advertising variation strategy (a negative appeal followed by a positive appeal) is more effective than an advertising repetition strategy (two negative appeals) in terms of recall. Study 2 builds on these findings by differentiating between taboo and non-taboo issues. This distinction is important because many social issues, such as HIV, domestic violence and child abuse, for instance, are taboo in LDCs. Interestingly, the findings of Study 1 are reproduced for non-taboo issues but not for taboo issues. If an issue is a conversational taboo in a certain culture, then an advertising repetition strategy that only uses positive appeals is more effective than an advertising variation strategy.

The use of students as participants may be a limitation of both studies. Because the reactions of students to specific message appeals may be age-related, concerns regarding the generalizability of the findings are justified.

Overall, the results of this paper provide useful information to social advertisers on when and how to use different types of advertising strategies in LDCs.