Per protocol analyses conducted in the sample of participants who completed all seven sessions of CBM indicated between-group superiority of the positive over control group on depression symptoms ( PHQ9 , BDI-II ) and psychological distress ( K10 ) following CBM ( Hedges g .55 -.88 , 95 % CI = -.03 -1.46 ) and following iCBT ( PHQ9 , K10 ) .