We do know that happiness is associated with an extended life span, she says. If we can get people to be happier, would that extend the lifespan? We dont know that yet. Future research can definitely try to show that.
Arthur Stone, a professor of psychiatry and psychology at Stony Brook University in New York, who has used measurements over the course of a day in his research, says the fact that the researchers got a relationship with mortality means that the relationship must be fairly robust because they only had 3,800 people and they were only measuring the one day.
psychiatry n. 精神病学
robust adj. 强健的;健康的
And what if some who were measured on that one day were just having a bad day?
A bad day should weaken the relationship, Stone says. What its saying is there are enough people here that people having odd days didnt really matter very much. Some people had bad days and some had good days. If they had been able to measure several days with these techniques, one would guess that the relationship would be even stronger.
Laura Kubzansky, an associate professor in the Department of Society, Human Development and Health, at Harvards School of Public Health in Boston, says theres a burgeoning body of work that suggests positive psychological functioning benefits health, and this study is significant because it adds to the arsenal.
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