This paper describes a study to explore the impact of experimental social studies materials on student attitudes toward other nations. The experimental materials were developed as part of the Global Studies Project sponsored by the Social Studies Development Center at Indiana University. Designed for the junior high level, the materials focused on basic human phenomena such as food and communication which are parts of all cultures. The hypothesis of the study was that students using the experimental materials would show a change in international attitudes after the experimental period, whereas students in a control group, which did not use the materials, would show no attitude change. For the study 15 junior high classes in six states were each divided into control and experimental groups. All groups received pre- and posttests before and after 15 weeks. The test measured students' attitudes toward 15 nations including Mexico, Canada, India, Ghana, China, and Russia. Extensive factor analysis was performed on the data. Contrary to the hypothesis, students in the experimental groups did not show a change of attitude. This suggests that children's international attitudes are formed before the junior high years. It is recommended that elementary curriculum be changed to incorporate more international studies in earlier grades. (AV)