The purpose of the study is to modify the IGIPS-III to enhance its applicability, and to improve its reliability and validity. First, some items from the original scale were divided into high, medium and low significant segments, and the respective operational definitions were delineated. Actual transcripts from the group were then rated. Finally, the researchers evaulated the result based on the interpersonal process theory, and items were then revised, combined, or added. Four group counseling experts in Taiwan were invited to review the revised version. Their comments were used to modify the scale again. Once the modification was completed the modified version was applied to rate a thirty-minute group process to examine its reliability. For validity, the experts’ average of CVI is 0.84 （0.71~0.94）and the CVI of each item falls between 0.67 and 1.00. For reliability, the ICC falls between 0.73 and 0.97 when high, middle, and low segments are set to be 1, 2, and 3; while the ICC falls between 0.63 and 0.98 when high, middle, and low segments are set to be 1, 3, and 5. Results show that the IGIPS-III-R possesses adequate validity and reliability. Furthermore, after the researchers finished editing the training manual, a doctoral student who has studied advance group counseling class was trained to use the modified Scale. The ICC falls between 0.51and 0.94, suggesting that the modified Scale has stronger applicability for training and group process research.