The Study of Shared Opinions in Varied Relational Situations - The Multiple-Association Methodology: This article examines the manner in which actors manage to form an opinion concerning certain aspects of AIDS, supposing that opinions are the product of interaction and not isolated acts. Cognitive and normative références are involved, but in societies of cultural diversity, an actor can be associated with different reference systems. Thus, we have adopted a structural approach for developing a theoretical model and a research protocol to study the (trans)formation of actor opinions associated with different relational contexts. The communicational convergence model we have adopted has led us to a survey tool capable of collecting information on actor opinions and the relational processes that produced them by comparing an actor's opinions formulated in two different situations. The data were analyzed at the individual level, at the dyade level and at the triad level, showing the influence of socio-metric structures on the versatility of opinions.