Wall Street Journal
It turns out, giving thanks is good for your health.
A growing body of research suggests that maintaining an attitude of gratitude can improve psychological, emotional and physical well-being.
Adults who frequently feel grateful have more energy, more optimism, more social connections and more happiness than those who do not, according to studies conducted over the past decade. They're also less likely to be depressed, envious, greedy or alcoholics. They earn more money, sleep more soundly, exercise more regularly and have greater resistance to viral infections.
Now, researchers are finding that gratitude brings similar benefits in children and adolescents. Kids who feel and act grateful tend to be less materialistic, get better grades, set higher goals, complain of fewer headaches and stomach aches and feel more satisfied with their friends, families and schools than those who don't, studies show.
"A lot of these findings are things we learned in kindergarten or our grandmothers told us, but we now have scientific evidence to prove them," says Jeffrey J. Froh, an assistant professor of psychology at Hofstra University in Hempstead, N.Y., who has conducted much of the research with children.
"The key is not to leave it on the Thanksgiving table," says Robert Emmons, a professor of psychology at the University of California-Davis and a pioneer in gratitude research. And, he notes, "with the realization that one has benefited comes the awareness of the need to reciprocate."
Philosophers as far back as the ancient Greeks and Romans cited gratitude as an indispensable human virtue, but social scientists are just beginning to study how it develops and the effects it can have.
The research is part of the "positive psychology" movement, which focuses on developing strengths rather than alleviating disorders. Cultivating gratitude is also a form of cognitive-behavioral therapy, which holds that changing peoples' thought patterns can dramatically affect their moods.
It's possible, of course, to over-do expressions of gratitude, particularly if you try to show it with a gift. "Thanking someone in such a way that is disproportionate to the relationship—say, a student giving her teacher an iPod—will create resentment, guilt, anger and a sense of obligation," says Dr. Froh.
Gratitude can also be misused to exert control over the receiver and enforce loyalty. Dr. Froh says you can avoid this by being empathic toward the person you are thanking—and by honestly assessing your motivations.
In an upcoming paper in the Journal of Happiness Studies, Dr. Froh and colleagues surveyed 1,035 high-school students and found that the most grateful had more friends and higher GPAs, while the most materialistic had lower grades, higher levels of envy and less satisfaction with life. "One of the best cures for materialism is to make somebody grateful for what they have," says Dr. Froh.
Much of the research on gratitude has looked at associations, not cause-and-effect relationships; it's possible that people who are happy, healthy and successful simply have more to be grateful for. But in a landmark study in the Journal of Personality and Social Psychology in 2003, Dr. Emmons and University of Miami psychologist Michael McCullough showed that counting blessings can actually make people feel better.
The researchers randomly divided more than 100 undergraduates into three groups. One group was asked to list five things they were grateful for during the past week for 10 consecutive weeks. The second group listed five things that annoyed them each week and the third group simply listed five events that had occurred. They also completed detailed questionnaires about their physical and mental health before, during and after.
Those who listed blessings each week had fewer health complaints, exercised more regularly and felt better about their lives in general than the other two groups.
Drs. Froh and Emmons conducted a similar study with 221 sixth- and seventh-graders from Candlewood Middle School in Dix Hills, N.Y., an affluent area on Long Island. Although the effects weren't as dramatic as with the adults, the students in the gratitude group did report a higher level of satisfaction with school and more optimism than the students who listed irritations, according to the study in the Journal of School Psychology in 2008.
As simple as it sounds, gratitude is actually a demanding, complex emotion that requires "self-reflection, the ability to admit that one is dependent upon the help of others, and the humility to realize one's own limitations," Dr. Emmons says.
Being grateful also forces people to overcome what psychologists call the "negativity bias"—the innate tendency to dwell on problems, annoyances and injustices rather than upbeat events. Focusing on blessings can help ward off depression and build resilience in times of stress, grief or disasters, according to studies of people impacted by the Sept. 11 terror attacks and Hurricane Katrina.
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