Does a Gratitude Journal Actually Work? What a 145-Study Meta-Analysis Found

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· 7 min read

🕐 30-second summary

  • The single highest-volume related search isn't "how to start a gratitude journal" — it's "what is a gratitude journal," a skeptical, definitional search.
  • The founding 2003 study (Emmons & McCullough) is real: gratitude groups showed higher well-being than groups logging hassles or neutral events.
  • A 2025 meta-analysis of 145 studies and 24,804 people across 28 countries found a small but real effect (Hedges' g = 0.19).
  • It's not a treatment for depression or anxiety — a separate 2021 meta-analysis found only a modest effect (d ≈ 0.13) there.
  • Generate a prompt and track your own streak in the widget below.

The single highest-volume related search around "gratitude journal" right now isn't "how to start one" or "gratitude journal prompts" — it's "what is a gratitude journal," followed closely by variants of the same question. That's a striking pattern: a large share of the demand isn't about technique, it's about whether the thing is even real.

The honest research answer sits between the enthusiastic wellness-blog version and the reflexive skeptic's dismissal.

The founding study: counting blessings vs. burdens

In 2003, Robert Emmons and Michael McCullough published "Counting Blessings Versus Burdens" in the Journal of Personality and Social Psychology. Across three studies, participants were randomly assigned to keep records of what they were grateful for, versus hassles they'd experienced, versus neutral life events.

🧠 Science: The gratitude groups showed higher well-being across several outcome measures relative to the comparison groups, and the effect on positive affect — actively feeling good, not just feeling less bad — was the most consistent finding across all three studies, including one involving people with neuromuscular disease.

That's the origin point for the entire "keep a gratitude journal" recommendation: a real randomized experiment, not just a folk intuition.

What a 2025 meta-analysis of 145 studies actually found

Twenty-two years later, the picture got much bigger. Choi, Cha, McCullough (yes, the same McCullough), Coles, and Oishi published their meta-analysis in PNAS in July 2025, pooling 145 papers, 163 samples, 727 effect sizes, and 24,804 participants across 28 countries.

💡 Tip: The result: gratitude interventions produced a small but real overall increase in well-being (Hedges' g = 0.19, 95% CI [0.15, 0.22]). It was stronger when studies used randomized controlled designs, measured positive emotion directly, or combined more than one type of gratitude exercise — a written list plus an occasional letter — rather than repeating a single format indefinitely.

📲 A meta-analysis needs your own data point too. TrakBit lets you track gratitude journaling as a real habit — not just an intention — with a ring that shows whether you actually wrote, not just whether you meant to. Download TrakBit free on the App Store →

The more sober number: what it does (and doesn't) do for depression and anxiety

A separate 2021 meta-analysis by Cregg and Cheavens in the Journal of Happiness Studies looked specifically at whether gratitude interventions reduce clinical symptoms of depression and anxiety, pooling 27 studies and 3,675 participants.

The effect was real but modest — around d = 0.13 for depression — and the authors' own conclusion was direct: people specifically trying to reduce clinical symptoms should look toward treatments with stronger evidence, not treat a gratitude journal as a substitute. "Makes people somewhat happier, on average" and "treats clinical depression" are very different claims, and only the first one is well supported.

What actually seems to matter in practice

Looking at what moderated effect sizes in the 2025 meta-analysis, three things line up with what the higher-quality studies actually tested, rather than generic "just write three things down" advice:

  • Variety over repetition. Combining formats — a list plus an occasional letter — outperformed repeating a single format.
  • A real completed written record, not a vague mental habit. The studies measuring actual finished entries, not just an intention to feel grateful, are the ones producing the effect.
  • Modest expectations. A small, real, cumulative effect across weeks — not a mood fix for one bad day.

Add a gratitude-journal habit to TrakBit in one click

Suggested template: "After I pour my morning coffee, I write down three things I'm grateful for." [Button: Add this template to TrakBit →] — deep link to a preloaded habit template anchored to an existing routine, logged as done/not-done.

FAQ

Does keeping a gratitude journal actually have scientific support, or is it just wellness-culture advice? It has real support. A 2025 meta-analysis pooling 145 studies and nearly 25,000 participants across 28 countries found a small but statistically real increase in well-being (Hedges' g = 0.19). It's not the biggest lever in psychology, but it isn't a myth either.

Can a gratitude journal treat depression or anxiety? Not on its own, based on the evidence. A 2021 meta-analysis focused specifically on depression and anxiety symptoms found only a modest effect (around d = 0.13) and explicitly recommended that people with clinical symptoms use treatments with stronger evidence instead.

Does it matter how I keep a gratitude journal — daily lists, letters, or something else? The 2025 meta-analysis found effects were stronger when studies combined more than one format rather than repeating the exact same format indefinitely — variety appears to matter more than any single "correct" template.

Where does the "counting blessings" idea actually come from? From a 2003 randomized study by Emmons and McCullough, where participants who kept regular records of what they were grateful for showed higher well-being than those who recorded hassles or neutral events.

Bottom line

A gratitude journal isn't a wellness myth, and it isn't a cure — it's a small, real, replicated effect on well-being that gets stronger with variety and an actual written record, and gets weaker the more it's asked to do, like standing in for depression or anxiety treatment. Treating it as one small, trackable input alongside everything else is closer to what the evidence supports than either extreme.

🔵🟢🟣 Track it, don't just intend it

TrakBit turns "I should journal more" into an actually tracked habit, with a ring you can see.

  • Multiple habits, one glance — pair gratitude journaling with the rest of your daily habits.
  • Fogg Analytics — see which cue (coffee, bedtime, commute) actually gets you writing.
  • No-punishment recovery — a skipped day doesn't erase your streak.
  • Privacy-first — your habit data is yours.

Download free on the App Store → (Coming soon to Google Play)

  • If you'd rather think about this as who you want to become, not just which habit to prioritize, Identity-Based Habits explains the complementary mechanism.
  • Anchoring the journal to something you already do (the coffee, not a vague time) is exactly what The Tiny Habits Method describes.
  • A skipped day shouldn't feel like "everything's broken" — The Psychology of Habit Streaks explains why.

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