“…Largely due to Bordin's (1979) transtheoretical reformulation of the alliance construct, which emphasized purposeful collaboration and affective bond, the alliance has been described as the “quintessential integrative variable” and “common factor” (Wampold & Imel, 2015; Wolfe & Goldfried, 1988) and has been the subject of multiple meta‐analyses indicating its predictive relationship to psychotherapy outcome (Horvath et al, 2011; Horvath & Symonds, 1991; Martin et al, 2000, Flückiger et al, 2018, 2020). The proliferation of this study ultimately led to a “second generation” of alliance research that aimed to study ruptures‐repair and to provide therapists “clinically‐friendly” data—namely “what to do when.” In sum, this study has demonstrated that ruptures and repairs are quite prevalent (e.g., anywhere from 30%–50% of sessions by self‐report or 30%–100% by the observer) and predictive of outcome (Eubanks et al, 2018); this generation also includes the promising benefits of alliance‐focused training (AFT) on rupture–repair (see Muran, 2019; Muran et al, 2018; to be discussed further below).…”