“…Each therapist rated the group independently, then the two therapists came to consensus on any areas of disagreement. The TGPRS was developed by us to measure not only verbal group therapy processes, but also processes in the music therapy groups which are widely accepted by creative arts therapists as important (Brown & Avstreih, 1980;Bruno, 1981;Cardone et al, 1982;Kagin & Lusebrink, 1978;McNiff, 1981;Noy, 1967aNoy, , 1967bNoy, , 1967cPlach, 1980;Priestly, 1975;Robbins, 1980;Ruud, 1978;Zwerling, 1979). Draft versions of the TGPRS were piloted by music, art, dance, and verbal group therapists, and the rating scale was revised to incorporate their feedback.…”