“…To achieve this efficacy, studies often have restrictions on the client sample (i.e., highly selected, homogenous, well‐defined participants), control of the practitioner skill set through standardised treatment protocols (e.g., essential intervention components versus proscribed intervention components), specified treatment outcomes (e.g., measured using detailed outcome assessments), and elimination of concurrent treatments (Fritz & Cleland, ; Hébert et al., ). Due to the methodological requirements of efficacy studies, the evidence for couple therapy has been gathered largely by specialist clinics attached to universities and research centres and may not generalise to routine practice settings (Carr, ).…”