Piper W E, Debbane E G, Garant J
Arch Gen Psychiatry. 1977 Sep;34(9):1027-32. doi: 10.1001/archpsyc.1977.01770210041003.
Outcome research in a group therapy program was conducted with therapists in training who had little prior experience with group therapy. Significantly greater improvement over an initial three-month period was found for treated patients when compared with control patients on a multivariate combination of five outcome criteria. Some, but not all, of the five separate criteria indicated such a difference. Only slight, nondifferentiating improvement was found for target symptoms. Significantly greater improvement over the three-month period on the multivariate combination was also found for treated patients who had begun therapy during the second year of the program when compared with treated patients who had begun therapy during the first year of the program. Finally, significant improvement over the three-month period on the multivariate combination was found for both treated and control patients.
在一个团体治疗项目中，对几乎没有团体治疗经验的实习治疗师开展了疗效研究。与对照患者相比，在五个疗效标准的多变量组合方面，接受治疗的患者在最初三个月期间有显著更大的改善。五个单独标准中的一些（但并非全部）表明了这种差异。对于目标症状，仅发现了轻微的、无差异的改善。与在项目第一年开始治疗的患者相比，在项目第二年开始治疗的患者在三个月期间的多变量组合方面也有显著更大的改善。最后，接受治疗的患者和对照患者在三个月期间的多变量组合方面均有显著改善。
