Interviews with high school seniors in Bolivia (n=1,100) and Chile (n=2,460) demonstrated that individuals with international contacts hold more positive attitudes toward others than those individuals without this type of exposure. The study examined the students' opinions about other countries of the Latin American region, opportunities for contacts available to respondents in the region, and the impact of those contacts on opinions toward other Latin Americans and on views toward Latin American integration. Chile and Bolivia offer a unique opportunity to study these questions since both countries have a long tradition of diplomatic tensions and boundary conflict. Results include the following: Respondents in both countries showed a mutual dislike. Only 31% of the Bolivians and 18% of the Chileans indicated having friends in neighboring countries. One-fourth of the Chileans had informal contacts in nations other than their immediate neighbors. Even in the case of countries with historical animosities, students who had had social relations beyond local and national boundaries were more accepting of citizens from the other countries. Finally, students with international contacts appeared more favorably disposed toward regional integration. (RM)