A three-section survey instrument was developed to provide descriptive and expressive information about teenagers' attitudes and fear reactions related to the nuclear threat. The first section consisted of one open-ended statement, "Write down your three greatest worries." The second section consisted of 20 areas of potential worry or concern considered salient to teenagers. The third section contained self-report opinion questions, self-ratings of anxiety and adjustment, ratings of perceived parent attitudes, and other questions of practical and theoretical value. Data were analyzed from the forced choice ratings and active rankings (section two) obtained from administration of the instrument to samples of adolescents in California (N=913), the Soviet Union (N=293), Hungary (N=267), Italy (N=1,030), and Ireland (N=425). The data showed that nuclear war was of great concern (second only to fears about parents dying) and that degree of concern was consistent across countries sampled. Future research should examine the psychological impact of the stress of nuclear concerns on the psychological development of children and adolescents and attempt to find ways to minimize negative effects. (NB)