California Psychotherapy Alliance Scale (CALPAS).The CALPAS (Marmar, Weiss, & Gaston, 1989) is a well-validated (e.g.,Gaston, 1991) 24-item self-report measure of therapeutic alliance. This measure has been used in other psychotherapy trials examining the rupture repairs in the alliance (e.g., Strauss et al.,2006) and has been shown to have similarly strong psychometric properties as other commonly used alliance measures (Horvath & Luborsky, 1993). The CALPAS includes items tapping the client’s commitment to therapy, his or her capacity to undertake work, the therapist’s understanding/involvement in therapy, and the dyad’s agreement on goals/strategies. These items attempt to capture the nature of the interaction between the therapist and client, which is central in the concept of the alliance (Gaston & Marmar, 1994).