Sandell R
Psychother Psychosom. 1985;44(2):103-9. doi: 10.1159/000287900.
The effects of time-limited psychotherapy, of the Mann (1973) type, were followed-up in a patient sample during 22 months. The effect ratings were highly reliable and showed a strikingly large variation. A path analysis was performed on the data and a causal model inferred that accounts for over 50% of the effect variation. The effect remained stable over time and was primarily influenced (positively) by patient's ego level and (negatively) by therapist's competence. Supervision had, if anything, a negative influence.
对一组患者样本进行了为期22个月的随访，观察了曼恩（1973年）式限时心理治疗的效果。效果评分高度可靠，且显示出显著的巨大差异。对数据进行了路径分析，并推断出一个因果模型，该模型解释了超过50%的效果差异。随着时间的推移，效果保持稳定，主要受到（正向）患者自我水平和（负向）治疗师能力的影响。如果说有什么影响的话，督导产生了负面影响。
