Global mega-study confirms gratitude practices boost mood, and other benefits vary across cultures

New research involving nearly 11,000 participants across 34 countries provides the most comprehensive evidence yet that gratitude practices work – and not always in the ways we expect.

Journaling, gratitude letters, counting your blessings – these practices have become wellness staples over the past decade. But the science behind them has had a notable gap, as most studies were small, short-term and conducted primarily in Western countries.

A new multinational mega-study – yes, that’s the actual word for it – just transformed that, offering the most geographically diverse look at gratitude interventions to date. Here’s what you need to know, and how to level up your own gratitude practice.

For this study, researchers wanted to know whether gratitude practices actually work, and whether they work the same way across different cultures. To find out, they conducted one of the largest gratitude experiments ever, testing six brief gratitude interventions across 34 countries with 10,696 participants.

The six interventions included common practices like writing gratitude letters, listing aspects they’re grateful for, and reflecting on grateful moments. Participants were randomly assigned to either a gratitude practice or one of three neutral control tasks. Then researchers measured immediate modifications in well-being outcomes including good affect, bad affect, optimism, life satisfaction, feelings of indebtedness and envy.

This massive scale – spanning continents, languages and cultural norms – addresses a critical weakness in previous research, which often relied on volunteers from the United States or other wealthy Western nations. By including participants from countries as diverse as Japan, Brazil, Kenya and Germany, the study offers a much clearer picture of how gratitude functions globally.

Gratitude reliably boosts mood, and other benefits also appeared

Results overwhelmingly showed that gratitude practices work. Compared to control tasks, all six gratitude interventions produced immediate improvements across multiple well-being measures. Participants reported better mood, more optimism, greater life satisfaction, and reduced harmful emotions like envy.

When researchers looked at how consistent these effects were across all 34 countries, a clear pattern emerged: good affect was the most reliable outcome. Gratitude practices boosted mood consistently, regardless of where participants lived.

The effects on other outcomes, like life satisfaction, optimism and reduced bad affect, were more variable. In some countries, these benefits were strong. In others, they were weaker. The specific type of gratitude practice also mattered; some interventions worked better for certain outcomes than others.

Why this matters for your gratitude practice

This research validates what many people have experienced firsthand: gratitude practices genuinely improve how you feel. If you’ve ever noticed that writing down three good aspects from your day lifts your mood, this study confirms you’re not imagining it.

Previous smaller studies – like those published in the Journal of Personality and Social Psychology and the Journal of Positive Psychology – found that gratitude journals and letters increased happiness and decreased depression for up to six months. This new mega-study builds on that foundation, confirming the mood-boosting effects while adding crucial nuance about cultural and contextual variability.

This massive study – literally the largest and most diverse study on this topic to date – confirms that gratitude practices genuinely improve good affect.

If gratitude isn’t a part of your daily or weekly practice, now’s the perfect time to start. Whether you choose to keep a weekly journal, write a letter of thankfulness or simply pause each evening to count three blessings in your life, the evidence is clear: your mood will transform.

yogaesoteric
June 7, 2026