“…Research from the field of adolescent psychotherapy supports the significant contribution of common factors, like the alliance (Shirk et al, 2011;Fernandez et al, 2016;van Benthem et al, 2020), with some research indicating an interaction between an adolescent's attachment history and alliance, with the working alliance having a stronger relationship to outcomes in adolescent clients with poorer attachment histories (Zack et al, 2015). Empirical support for therapist flexibility and its impact on later client engagement and improvement in therapy has also been reported (Chu and Kendall, 2009), in line with the above-mentioned focus on therapist responsiveness (Hatcher, 2015;Wu and Levitt, 2020). Qualitative studies exploring the adolescent client's perspective on psychotherapy similarly point to the significance of the therapist-as-person (including transparency, benevolence, and authenticity), the therapist's management of key issues, like confidentiality, power imbalance, and client agency, and the client's feeling of being understood, as decisive for the perceived accessibility and usefulness of therapy (Binder et al, 2011;Sagen et al, 2013;Gibson et al, 2016;Lavik et al, 2018;Løvgren et al, 2019;Radez et al, 2021;Stige et al, 2021).…”