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Avoir des amis diminue votre risque de mortalité !

 

Researchers are only now starting to pay attention to the importance of friendship and social networks in overall health. A 10-year Australian study found that older people with a large circle of friends were 22 percent less likely to die during the study period than those with fewer friends. A large 2007 study showed an increase of nearly 60 percent in the risk for obesity among people whose friends gained weight. And last year, Harvard researchers reported that strong social ties could promote brain health as we age.

“In general, the role of friendship in our lives isn’t terribly well appreciated,” said Rebecca G. Adams, a professor of sociology at the University of North Carolina, Greensboro. “There is just scads of stuff on families and marriage, but very little on friendship. It baffles me. Friendship has a bigger impact on our psychological well-being than family relationships.”

In a new book, “The Girls From Ames: A Story of Women and a 40-Year Friendship” (Gotham), Jeffrey Zaslow tells the story of 11 childhood friends who scattered from Iowa to eight different states. Despite the distance, their friendships endured through college and marriage, divorce and other crises, including the death of one of the women in her 20s.

Using scrapbooks, photo albums and the women’s own memories, Mr. Zaslow chronicles how their close friendships have shaped their lives and continue to sustain them. The role of friendship in their health and well-being is evident in almost every chapter.

Two of the friends have recently learned they have breast cancer. Kelly Zwagerman, now a high school teacher who lives in Northfield, Minn., said that when she got her diagnosis in September 2007, her doctor told her to surround herself with loved ones. Instead, she reached out to her childhood friends, even though they lived far away.

“The first people I told were the women from Ames,” she said in an interview. “I e-mailed them. I immediately had e-mails and phone calls and messages of support. It was instant that the love poured in from all of them.”

When she complained that her treatment led to painful sores in her throat, an Ames girl sent a smoothie maker and recipes. Another, who had lost a daughter to leukemia, sent Ms. Zwagerman a hand-knitted hat, knowing her head would be cold without hair; still another sent pajamas made of special fabric to help cope with night sweats.

Ms. Zwagerman said she was often more comfortable discussing her illness with her girlfriends than with her doctor. “We go so far back that these women will talk about anything,” she said.

Ms. Zwagerman says her friends from Ames have been an essential factor in her treatment and recovery, and research bears her out. In 2006, a study of nearly 3,000 nurses with breast cancer found that women without close friends were four times as likely to die from the disease as women with 10 or more friends. And notably, proximity and the amount of contact with a friend wasn’t associated with survival. Just having friends was protective.

Bella DePaulo, a visiting psychology professor at the University of California, Santa Barbara, whose work focuses on single people and friendships, notes that in many studies, friendship has an even greater effect on health than a spouse or family member. In the study of nurses with breast cancer, having a spouse wasn’t associated with survival.

While many friendship studies focus on the intense relationships of women, some research shows that men can benefit, too. In a six-year study of 736 middle-age Swedish men, attachment to a single person didn’t appear to affect the risk of heart attack and fatal coronary heart disease, but having friendships did. Only smoking was as important a risk factor as lack of social support.

Exactly why friendship has such a big effect isn’t entirely clear. While friends can run errands and pick up medicine for a sick person, the benefits go well beyond physical assistance; indeed, proximity does not seem to be a factor.

It may be that people with strong social ties also have better access to health services and care. Beyond that, however, friendship clearly has a profound psychological effect. People with strong friendships are less likely than others to get colds, perhaps because they have lower stress levels.

Last year, researchers studied 34 students at the University of Virginia, taking them to the base of a steep hill and fitting them with a weighted backpack. They were then asked to estimate the steepness of the hill. Some participants stood next to friends during the exercise, while others were alone.

The students who stood with friends gave lower estimates of the steepness of the hill. And the longer the friends had known each other, the less steep the hill appeared.

pour "booster" l'intelligence de votre enfant (équipe ?) :
- louez ses efforts plus que ses résultats
- félicitez les succès
- limitez les critiques
- stimulez la curiosité par les compliments

Poor people have I.Q.’s significantly lower than those of rich people, and the awkward conventional wisdom has been that this is in large part a function of genetics.

After all, a series of studies seemed to indicate that I.Q. is largely inherited. Identical twins raised apart, for example, have I.Q.’s that are remarkably similar. They are even closer on average than those of fraternal twins who grow up together.

If intelligence were deeply encoded in our genes, that would lead to the depressing conclusion that neither schooling nor antipoverty programs can accomplish much. Yet while this view of I.Q. as overwhelmingly inherited has been widely held, the evidence is growing that it is, at a practical level, profoundly wrong. Richard Nisbett, a professor of psychology at the University of Michigan, has just demolished this view in a superb new book, “Intelligence and How to Get It,” which also offers terrific advice for addressing poverty and inequality in America.

Professor Nisbett provides suggestions for transforming your own urchins into geniuses — praise effort more than achievement, teach delayed gratification, limit reprimands and use praise to stimulate curiosity — but focuses on how to raise America’s collective I.Q. That’s important, because while I.Q. doesn’t measure pure intellect — we’re not certain exactly what it does measure — differences do matter, and a higher I.Q. correlates to greater success in life.

Intelligence does seem to be highly inherited in middle-class households, and that’s the reason for the findings of the twins studies: very few impoverished kids were included in those studies. But Eric Turkheimer of the University of Virginia has conducted further research demonstrating that in poor and chaotic households, I.Q. is minimally the result of genetics — because everybody is held back.

“Bad environments suppress children’s I.Q.’s,” Professor Turkheimer said.

One gauge of that is that when poor children are adopted into upper-middle-class households, their I.Q.’s rise by 12 to 18 points, depending on the study. For example, a French study showed that children from poor households adopted into upper-middle-class homes averaged an I.Q. of 107 by one test and 111 by another. Their siblings who were not adopted averaged 95 on both tests.

Another indication of malleability is that I.Q. has risen sharply over time. Indeed, the average I.Q. of a person in 1917 would amount to only 73 on today’s I.Q. test. Half the population of 1917 would be considered mentally retarded by today’s measurements, Professor Nisbett says.

Good schooling correlates particularly closely to higher I.Q.’s. One indication of the importance of school is that children’s I.Q.’s drop or stagnate over the summer months when they are on vacation (particularly for kids whose parents don’t inflict books or summer programs on them).

Professor Nisbett strongly advocates intensive early childhood education because of its proven ability to raise I.Q. and improve long-term outcomes. The Milwaukee Project, for example, took African-American children considered at risk for mental retardation and assigned them randomly either to a control group that received no help or to a group that enjoyed intensive day care and education from 6 months of age until they left to enter first grade.

By age 5, the children in the program averaged an I.Q. of 110, compared with 83 for children in the control group. Even years later in adolescence, those children were still 10 points ahead in I.Q.

Professor Nisbett suggests putting less money into Head Start, which has a mixed record, and more into these intensive childhood programs. He also notes that schools in the Knowledge Is Power Program (better known as KIPP) have tested exceptionally well and favors experiments to see if they can be scaled up.

Another proven intervention is to tell junior-high-school students that I.Q. is expandable, and that their intelligence is something they can help shape. Students exposed to that idea work harder and get better grades. That’s particularly true of girls and math, apparently because some girls assume that they are genetically disadvantaged at numbers; deprived of an excuse for failure, they excel.

“Some of the things that work are very cheap,” Professor Nisbett noted. “Convincing junior-high kids that intelligence is under their control — you could argue that that should be in the junior-high curriculum right now.”

The implication of this new research on intelligence is that the economic-stimulus package should also be an intellectual-stimulus program. By my calculation, if we were to push early childhood education and bolster schools in poor neighborhoods, we just might be able to raise the United States collective I.Q. by as much as one billion points.

That should be a no-brainer.

New York Times