ObjectivesUK participants (29 female, 26 male) took part in a single blind randomised controlled trial to test whether concentrating on gratitude increased self-reported measures of wellbeing more than concentrating on happiness.MethodParticipants in the two intervention groups were guided by an instructional video and asked to list three items a day in a customised to this study note-pad for a period of 12 consecutive days. They completed a battery of wellbeing measures before and after the intervention. A third group, the control group, completed only the battery of wellbeing measures at pre and post intervals.FindingsA trend of reduced psychological distress was reported between the treatment and control groups. No significant advantage between concentrating on happiness or gratitude was found.