“…Another important limitation is the use of single-item self-report measures, especially for session outcome, a choice that was aimed to mitigate the burden of session-by-session assessment over a 30-session period. This measure has the advantage of being a subjective measure of outcome, based on the individuals’ perceptions of their problems, and can provide an important patient-centered perspective of the process of therapeutic change (Flückiger, Hilpert, Goldberg, Caspar, Wolfer, Held, & Vîslă, 2019; Hill & Betz, 2005). Although the validity of this measure has been demonstrated before (Muran et al, 1992; Zilcha-Mano et al, 2016), it is critical to replicate the present findings using weekly measures of symptom severity, such as the Hamilton Rating Scale for Depression (Hamilton, 1967) and the Outcome Questionnaire (Lambert, Vermeersch, & Brown, 2004).…”