Figure 1. The Moderation of the Relationship between Working Alliance Overall Score and BDI Scores by Treatment Type.
Note: Only the interaction between the overall WAI score and treatment condition is shown. The interactions between each of the WAI scales (Therapeutic Bond, Agreement on the Tasks, and Goals of Therapy) and treatment condition as it relates to changes in BDI scores over time were similar to that depicted here. Tests of the simple slopes indicated that that there was a significant downward slope for the IPT condition (χ2(1)=6.94, p<.01). The simple slope of TAU was not significant (χ2(1)=1.81, p>.05).