“…The concept of TA has been long called into question in the treatment of a whole variety of disorders (Mander et al, ), mostly with respect to psychotherapy interventions (Del Re, Flückiger, Horvath, Symonds, & Wampold, ; Horvath, Del Re, Flückiger, & Symonds, ; Taylor, Rietzschel, Danquah, & Berry, ; Zaitsoff et al, ) with several studies showing that multiple psychotherapy approaches lead to comparable positive effects. In this regard, it would be of interest to investigate more the common factors in the field of psychotherapy, as authoritatively stated (Wampold, ).…”