Research paper · RP09

Three Good Things, Twenty Years Later

Lyubomirsky’s weekly-beats-daily claim has been repeated for twenty years and has never been pooled. The pooled well-being effect of gratitude interventions is small: Hedges g = 0.19 (95% CI 0.15 to 0.22), from the largest pre-registered synthesis (k = 145 papers, N = 24,804, 28 countries). The listing, or “counting blessings”, subtype sits slightly lower, at g = 0.17. We asked a narrower question. Does weekly gratitude listing produce larger or more durable gains than daily listing in adults? We searched PubMed, PsycINFO, Scopus, Web of Science, Google Scholar, CTRI, ClinicalTrials.gov and OSF from 2003 to September 2026. Eligible studies were randomised or controlled trials of gratitude listing or journaling with frequency stated in the methods — never inferred. Primary outcomes were well-being and positive affect. Depressive symptoms were secondary. Twelve listing trials stated frequency exactly and met adult-population rules. Zero published trials randomised daily listing against weekly listing. The famous “weekly beats daily” contrast is a mis-statement of an unpublished student study that compared one session a week with three sessions a week. A prior meta-analysis already tested days of listing as a moderator of well-being and found no effect (p = .233). Daily lists produced small gains in positive affect in some trials (typical published d = 0.15 to 0.38 versus a neutral control; larger versus a hassles control) and a null in the largest listing trial (N = 958). Weekly lists produced small gains in life evaluation in some trials and nulls in others. Twice-weekly listing for four weeks, in Hong Kong hospital staff, reduced depressive symptoms (d = −0.49) and perceived stress (d = −0.95) at three months. Effects appear by week one or two. Stretching a list from seven days to fourteen does not reliably enlarge the gain. Thrice-weekly prompts for three weeks faded by three months. Certainty is moderate for a small listing-versus-control gain, and very low for any claim that weekly beats daily. No high-quality adult listing trial from India was found. For an Indian workplace programme the honest dose is not “daily forever”. It is a short, prompted, language-local list, one to three times a week, with a stop-rule when the practice goes stale.