It is 10 p.m. on a Tuesday, your gratitude journal is open, and you are about to write “my family” for the fourth night running because nothing new comes to mind. The habit that felt warm in its first week now feels like homework. Happiness researcher Sonja Lyubomirsky and her colleagues call that fading adaptation: people get used to anything repeated the same way. They suggest varying what you write about, and one unpublished test they report points to writing less often.¹

A gratitude journal is a notebook, file or app in which you regularly write down things you are thankful for. It sits close to mindfulness, the practice of noticing the present on purpose, and is a popular exercise in positive psychology. A 2025 meta-analysismeta-analysis: A study that combines the results of earlier studies on the same question into one overall estimate. Pooling makes the estimate more precise, but it cannot repair the studies it pools: a meta-analysis of surveys is still survey evidence.Full entry in the glossary of 145 papers from 28 countries found that people who did gratitude exercises ended up with slightly higher well-being than comparison groups, a small average effect.² It is not a treatment for depression: a 2021 review found only modest effects on symptoms of depression and anxiety, and its authors advise people seeking relief to turn to better-tested treatments.³

Five low-risk habits fit that evidence:

1. Write once a week, or a few times at most
2. List a handful of specific good things
3. Add why each one happened
4. Rotate the part of life you write about
5. Review after a month and keep it only if it still feels fresh

The 2003 experiments behind the gratitude journal

An early and widely cited test of the gratitude journal came in 2003, when Robert Emmons (University of California, Davis) and Michael McCullough (University of Miami) published three experiments funded by the John Templeton Foundation. In the main one, 192 undergraduates were randomly assigned to spend 10 weeks writing, once a week, up to five things they were grateful for, up to five hassles, or a list of ordinary events.⁴

The gratitude writers rated their lives more favorably and reported fewer physical symptoms than both other groups, and said they exercised nearly an hour and a half more a week than the hassles group. They did not report feeling more positive or less negative than the other groups, though, and the exercise gain did not show up again in two shorter follow-up studies. In a third study, adults with neuromuscular diseases who listed blessings each evening for three weeks reported better mood and more sleep than a group that only filled in questionnaires. The authors called their exercise a minimal intervention and said they did not know how long its effects last.⁴

Why does the comparison group matter so much? The exercise figure set gratitude against writing down complaints, an activity that may itself add stress.⁵ Any gap between those two groups mixes the good of counting blessings with the cost of counting hassles. It is a little like judging a new diet against eating cake every day: the result tells you as much about the cake as about the diet.

So carry one question into every gratitude claim you read: compared with what? A benefit measured against people who dwelt on their hassles is not the same as a benefit over living your normal week.

How much does a gratitude journal help? Less than the claims suggest

A 2016 meta-analysis led by Don Davis of Georgia State University found that gratitude exercises beat doing nothing by a small margin but did no better than other psychologically active exercises, and its authors called the evidence for them weak. They raised the possibility that the exercises work mainly through expectation: a placebo effect, which is most likely when people expect an activity to help.⁵

The study

Limited evidence

The fairer the comparison, the smaller the gain (Davis et al., 2016 meta-analysis)

Against people who only filled in questionnaires, gratitude exercises raised psychological well-being by a small amount (d = 0.31, five samples). Against comparison activities matched to the gratitude task, the gain was smaller still (d = 0.14) and disappeared once the authors adjusted for studies that may be missing (d = 0.02). Against other psychologically active exercises, there was no difference (d = −0.03). In journal and list studies, neither the number of days nor the minutes of practice changed the size of the effect.⁵

In plain terms, the more closely the comparison activity resembled the gratitude exercise, the smaller the advantage became, until there was none.

A 2012 replication of a well-known 2005 trial of positive psychology exercises points the same way. When Myriam Mongrain and Tracy Anselmo-Matthews repeated it with a better control condition, a “positive placebo” meant only to bring positive information about the self to mind raised happiness about as much as the positive psychology exercises did (our account rests on the study’s abstract alone).⁶ The 2025 review likewise found no clear difference between gratitude exercises and other positive activities.²

Gratitude exercise Comparison group. Heights show the pattern, not measured values.

1. Against doing nothing: compared with people who only filled in questionnaires, gratitude exercises came out a little ahead in a 2016 meta-analysis
2. Against a matched neutral activity: the lead shrank, and it disappeared once the authors adjusted for studies that may be missing
3. Against another positive exercise: no difference, in the 2016 review and again in a larger 2025 one

Picture two colleagues who each spend five minutes a night writing. One lists what went well; the other writes about a moment she enjoyed that day. On this evidence, both might see a similar small lift.

The lesson is freeing: if you enjoy listing good things, keep going; if another kind of positive reflection suits you better, the reviews found no clear edge for gratitude over the positive activities they compared.

Why a gratitude journal is not a depression treatment

Gratitude exercises had only a small effect on symptoms of depression and anxiety in a 2021 meta-analysis by David Cregg and Jennifer Cheavens of Ohio State University, and a trivial one against active comparison tasks. The authors concluded that, used on their own, the exercises were not effective for these symptoms. Of the 27 studies they pooled, only two recruited people with a diagnosed condition or seeking treatment, so the results say little about clinical depression. Their advice is specific: anyone trying to ease depression or anxiety should seek treatments with stronger evidence.³

A 2023 review of 64 randomized trials, led by Geyze Diniz in Brazil, concludes more warmly that gratitude exercises can complement treatment for anxiety and depression. Its depression result, though, pooled only three trials, and the authors rated that evidence low in certainty, with most included studies at high risk of bias.⁷ An add-on to treatment is still not a replacement for it.

A small average effect, measured mostly in volunteers without a diagnosis, tells you what a journal might add to an ordinary week, not what it can do for someone who is struggling. Consider someone whose low mood has lasted for weeks, who starts a gratitude journal and feels worse because the good things on the page lift nothing. On this evidence, the journal was never the right tool for that job, which says nothing about the writer’s effort. If you think you may be depressed, the UK’s NHS says to see a GP and not to put it off.⁸ If you are struggling, the journal can wait; the appointment should not.

Further reading

• 

  The How of Happiness: A New Approach to Getting the Life You Want

  by Sonja Lyubomirsky

  The researcher behind the once-a-week finding explains how to vary happiness exercises so they do not go stale.

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How often to write: once a week may be enough

Writing once a week was the only schedule linked to a gain in the best-known experiment to compare frequencies, reported in 2005 by Sonja Lyubomirsky, Kennon Sheldon and David Schkade. Students who counted their blessings once a week for six weeks grew happier than a group that only completed the questionnaires, while students who counted three times a week did not.¹

Treat that finding with care. It comes from unpublished data summarized in a review that gives no sample size or how students were assigned. The authors’ explanation is adaptation: people get used to anything repeated the same way, so counting blessings several times a week may turn stale, while a practice spaced out has time to feel fresh again. That is their suggestion, not something they measured.¹ The larger reviews do not contradict it: in the 2016 meta-analysis, neither days nor minutes of practice predicted the benefit,⁵ and in the 2025 one, the number of sessions made no clear difference either.²

Myth

A gratitude journal works best if you write in it every day.

Fact

In one unpublished test of timing, happiness rose with once a week but not three times a week; two meta-analyses found no clear link between amount of practice and benefit.

A Sunday evening spent recalling the whole week gives you more to choose from than a nightly list squeezed out of an ordinary Tuesday. So if a daily journal has started to feel like a duty, cutting back to once a week costs you nothing the evidence can detect. A similar point turns up in meditation research, where how long you should meditate matters less than people expect.

How to keep a gratitude journal that stays useful

What follows are low-risk habits for healthy adults, pieced together from the research in the earlier sections: ideas to try rather than a tested program, and no substitute for care if you are depressed or anxious.

1. Write once a week, or a few times at most

Pick one or two fixed moments in the week, such as Sunday evening, and tie them to something you already do; how habits form through repetition explains why a fixed cue helps. If you like writing daily and it still feels fresh, nothing in the evidence says to stop.

2. List a handful of specific good things

Emmons and McCullough asked for up to five things, large or small, and their students listed everything from waking up in the morning to the generosity of friends and the Rolling Stones.⁴ Specific entries (“my colleague covered my call when my child was sick”) give you something to picture, where “my job” gives you little.

3. Add why each one happened

Martin Seligman’s 2005 online trial, the one Mongrain later repeated, recruited 577 adults from visitors to his book’s website; one exercise asked people to write three things that went well each day for a week and what caused each one. They were happier and less depressed than at the start for six months, while a group writing about early memories was back at baseline within a week.⁹ The volunteers had sought out a happiness website, and in the replication a positive placebo did about as well for happiness and the exercises did no better than the control on depression,⁶ so treat the “why” as a cheap addition that may deepen the reflection, not a proven ingredient.

4. Rotate the part of life you write about

Lyubomirsky and her colleagues suggest varying the areas of life you count blessings in, such as relationships one week and work or health the next, to keep the practice from going stale.¹ Nobody has tested this directly, but it costs nothing to try.

5. Review after a month and keep it only if it still feels fresh

The classic studies ran for weeks, not years, so nobody knows how long the effects last. In Seligman’s trial, people who kept going on their own after the first week had the most lasting benefits, though the people who enjoyed the exercise may simply have been the ones who continued.⁹ Try it for a month; if it has become a chore, change the format or stop.

WiserHours

A gratitude journal that stays fresh

• Choose one or two fixed times a week
• Write a handful of specific good things
• Add a line on why each one happened
• Rotate the area of life I write about
• Review after a month: keep, change or stop
• See a doctor if low mood lasts, whatever the journal says

Find this checklist online:
https://wiserhours.com/mindfulness/gratitude-journal/#checklist-gratitude-journal-habits

The table sorts the claims behind these habits by how much evidence supports each one.

When low mood needs more than a journal

A gratitude journal is a small wellness habit; persistent low mood, and any thoughts of suicide or self-harm, call for people rather than a notebook. Help pages from the US National Institute of Mental Health (NIMH) and the UK’s NHS, both checked in September 2026, sort into three levels of urgency; the wider mindfulness and meditation section covers related practices.

• Now: for a life-threatening emergency in the US, NIMH points people to 911 or the closest emergency room, and, for anyone having thoughts of suicide or in emotional distress, to 988 (the Suicide & Crisis Lifeline, which takes calls and texts).¹⁰ In the UK, the NHS names 999 or A&E if someone’s life is in danger or you cannot keep yourself safe, plus Samaritans (116 123) for a listening ear.¹¹ In other countries, use the local emergency number.
• Soon: in England, the NHS sends people who need urgent mental health help to 111 (its mental health option) or to an urgent GP slot.¹¹ Lasting unhappiness or hopelessness, or losing interest in things you used to enjoy, are depression symptoms the NHS lists; they call for a doctor’s appointment rather than a longer trial of journaling.⁸
• Routine: already in treatment for depression or anxiety and thinking of adding a gratitude journal? Mention it to your clinician next time you meet.

The bottom line

A gratitude journal is a cheap, low-risk habit linked to a small average lift in well-being, about as much as other positive reflection exercises and no more. Write a few specific things once or a few times a week, add why they happened if you like, and drop the schedule when it goes stale. If your mood stays low, the journal is not the answer: see a doctor.