The effect of cultural background on group decision making was studied by an experiment. Sixteen teams of students were formed and assigned a task. One of the response variables was the number of group interactions prior to the final group decision. Eight teams consisted of foreign students, eight of U$.$S$.$ students. Half of the teams consisted of eight members, the other half of four members. Two foreign observers were used for the foreign teams, and two U$.$S$.$ observers for the U$.$S$.$ teams. Thus, the design may be represented as follows: