Convergent validity of the Agnew Relationship Measure and the Working Alliance Inventory.

The convergent validity of the Agnew Relationship Measure (ARM) and the Working Alliance Inventory (WAI) was assessed in samples drawn from 2 comparative clinical trials of time-limited psychotherapies for depression. In 1 sample, clients (n = 18) and therapists (n = 4) completed self-report versions of both measures after every session (n = 198). In the other sample, clients (n = 39) and therapists (n = 6) completed the ARM, and observers subsequently rated selected audiotaped sessions (n = 78) using the WAI. In both samples, the ARM's core alliance scales (Bond, Partnership, and Confidence) were correlated with the WAI's scales (Bond, Tasks, and Goals) strongly when assessed within client and therapist perspectives and, with some qualifications, moderately when assessed between client, therapist, and observer perspectives, supporting the assumption that the ARM and the WAI measure some of the same core constructs.