Science Says Couples With One Habit Stay Together Longer
couple holding hands happy
couple holding hands happy

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They're grateful.

Regularly taking a moment to stop and show your partner you're thankful for her small acts of kindness — be they taking out the trash or fixing your computer — can make both of you feel more satisfied and strengthen your relationship.

Psychologists didn't start systematically studying gratitude — let alone its impact on romantic relationships — until the early 2000s. Before then, most of the research in the field focused on negative emotions and the problems that either produced or stemmed from these feelings.

But a decade of social science research suggests that partners who show they care about the little things activate a two-way feedback system that helps both members of a relationship feel closer and more fulfilled.

Two psychologists, University of California, Davis’ Robert Emmons and University of Miami's Michael McCullough spearheaded most of the early research on gratitude's effects.

In one of of their studies, the researchers had volunteers keep weekly journals in which they wrote about particular topics. One group wrote about major events that had happened that week. Another group wrote about hassles they'd experienced. The last group wrote about things they were grateful for. Ten weeks later, those in the gratitude group reported feeling more optimistic and more satisfied with their lives than those in any of the other groups. They also reported fewer physical symptoms of discomfort, from runny noses to headaches, and exercised more.

Years later, University of North Carolina at Chapel Hill psychologist Sara Algoe took those same feelings of gratefulness and studied how they might affect not just one person, but couples in romantic relationships. For her study, Algoe also had couples keep a diary (just like Emmons and McCullough had). Instead of recording anything they felt grateful for, however, Algoe had her participants list things their partner had done that made them feel grateful, along with how each act of kindness made them feel. Participants also kept track of kind acts they directed toward their partner, and how those made them feel.

Over the course of 1,768 days of reports, participants reported that their partner did something thoughtful for them nearly 700 times, while they reported doing something thoughtful for their partner slightly less often (601 times). But there was a sad twist: Nearly half of the attempted acts of kindness went undetected by the other person. What mattered, it turned out, wasn't how often someone in the relationship did a thoughtful thing — it was how grateful the partner reported feeling about it.