Participants were asked to write a thank-you note to another person once a week for three weeks. They didn't necessarily send the letters but were asked to write them.
The results of the study showed an increase in participant well-being.
The effect of the action did not happen immediately; their happiness increased between 4 to 12 weeks after the intervention, and the effect remained months later.
Gratitude raises awareness of positive emotions.
Any small action we do in our everyday routine can significantly improve our well-being.