A study of group member satisfaction investigated which communication behaviors satisfy and dissatisfy people in their group experiences, and whether satisfaction and dissatisfaction are bi-polar opposites or are two crucially different variables. The baseline data generated in this project, which included the participation of 20 upper-grade undergraduate subjects studying group communication, provided the initial elements in developing measuring instruments to aid in identifying, defining, and explaining group member satisfaction and dissatisfaction. Results confirmed that the three variables identified by R. Heslin and D. Dunphy (1964) are important factors contributing to satisfaction. The data generated here, however, offer evidence contrary to the general assumption suggested by P. J. Marston and M. L. Hecht (1988) that dissatisfaction is the logical and numerical opposite of satisfaction. These data also suggest that, on the whole, satisfaction is a global attribute as long as the group is moving in its expected direction. Also, the greater variation identified in the dissatisfaction factors in the testing of the situational items suggests that researchers need to consider a two-step approach to measuring group member satisfaction. (Five tables of data and five appendixes containing questionnaires are included.) (KEH)