Aids and Me, Never the Twain Shall Meet: the Effects of Information Accessibility on Judgments of Risk and Advertising Effectiveness

Abstract

The HIV virus is now an international killer, but individuals perceive that they are less likely to contract the virus than are others (the self-positivity bias). Three studies investigate the antecedents and consequences of the self-positivity bias in judgments of the risk of contracting AIDS. We show that the perceived similarity of another person to oneself and the ease with which related information can be retrieved from memory (the accessibility of information) moderate self-perceptions of risk in an absolute sense and reduce the self-positivity bias. We then demonstrate that increasing the accessibility of a cause of AIDS, in an advertisement propounding safe sex, increases perceptions of one's own risk of contracting AIDS, reduces the self-positivity bias, leads to more favorable attitudes and intentions toward practicing precautionary behaviors (e.g., using condoms, taking an HIV test), and also leads to deeper processing of AIDS educational material. Theoretical implications regarding the use of the accessibility of information as a cue and the self-positivity bias are discussed, and recommendations for social marketing communications are offered.