“…The method has been designated an empirically validated treatment (e.g., NICE, ), and several meta‐analyses have demonstrated BA to be an effective treatment for depression (e.g., Cuijpers, Karyotaki, de Wit, & Ebert, ; Ekers et al, ). BA is easy to administer (see Richards et al, ) and efficacious within many diverse patient populations (e.g., Alexopoulos et al, ; Folke et al, ; Luoto et al, ; Ryba, Lejuez, & Hopko, ; Xie et al, ) in individual as well as in group treatment formats (Ekers et al, ). Given its parsimonious and straightforward rationale, BA is considered highly suitable for large scale dissemination (see Richards et al, ).…”