Archival studies of political decision-making groups show that the public statements of policy makers in the majority are higher in integrative complexity than those of minority-faction or unanimous group members. However, whether these differences reflect policy makers' private thoughts, or their public impression management strategies, cannot be inferred using only data from the public record. The experiment reported here established that in freely interacting groups composed of majorities and minorities, this pattern is obtained under private communication conditions as well as in public statements. Results suggest that cognitive flexibility in response to influence from insiders, rather than communication strategies designed to influence outsiders, underlies the differences observed. (C) 1998 Academic Press.