The Brazilian-adapted Working Alliance Inventory: preliminary report on the psychometric properties of the original and short revised versions

Introduction  Alliance is an essential component of all psychotherapies and a consistent predictor of its outcomes. The Working Alliance Inventory (WAI) is a widely used and psychometrically sound measure of alliance. It assesses three key aspects of the construct: a) agreement on the tasks of therapy; b) agreement on the therapeutic goals; and c) development of an affective bond.

Objective  To preliminarily analyze the psychometric properties of the Brazilian version of both the original, 36-item WAI, and of the short form revised, 16-item version (WAI-SR).

Methods  The sample comprised 201 psychodynamic psychotherapy patients. Alliance assessments were made after the 4th treatment session.

Results  The inventory adapted to Brazilian Portuguese, in both the original and short forms, appears to be reliable and valid to measure alliance and its dimensions by clients in psychotherapy. Further studies are needed to replicate and expand the findings.

Therapeutic alliance; psychometric properties; reliability; validity; Working Alliance Inventory