Figure 1. Lines of Congruence and Incongruence.

Note. This is a representation of the lines along which the response surface will be plotted. The line of congruence represents the strength of the alliance given perfect agreement. The line of incongruence represents divergence in therapist and client views of the alliance (ranging from the therapist viewing the alliance much more negatively than the client to the client viewing the alliance much more positively than the therapist).