An instrument was developed and tested which would measure intermediate interaction behavior in small-group communication. The study was designed to uncover the several dimensions of such behavior and produce a reliable, valid measure for each dimension that would yield data amenable to parametric statistical analysis. Analysis of two experiments in small-group discussion revealed six main factors: orientation, tension, flexibility, relevance, interest, and verbosity. These factors were chosen for the Intermediate Interaction Behavior Measure (IIBM). Significance tests confirmed the validity of these factors. The IIBM should be useful in measuring either "live" or videotaped interactive behavior. (JK)