A comparison of curative factors in different types of group psychotherapy.

The authors have constructed a Dutch version of Yalom's "Questionnaire for Curative Factors." This Dutch version has been administered to 134 participants of 22 psychotherapy groups in various psychiatric services in the Netherlands. Results concerning validity and reliability of the instrument are presented, as well as concerning the homogeneity of the hypothesized "factors." Differences between types of groups and categories of group members were tested by means of techniques of analysis of variance (ANOVA). Multiple regression analysis was applied in order to detect variables of differential qualities on one or more factors. Only the factor identification, neglected in literature on curative factors, was highly predictable.