Words of gratitude for even little things keep relations strong and long lasting. Researchers from California University, Berkeley came to that conclusion after observing 25 couples during 9 months.

As Firstnews.ru reports linking at Livescience, the words ‘thank you’ can save marriages even in the worst conditions. The participants of the experiment were asked to fill out questionnaires stating how they feel when they are near their partners. Besides, they were ordered to keep diaries during the week, writing down how they felt.

After nine months the volunteers were questioned again. As it came out, those who appreciated their partner from the beginning had become more devoted to them. You should tell your partner how grateful you are event for the smallest thing, the scientists concluded.