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March 25, 2010

Optimism is good for your immunity

A recent study suggests that feeling better about your future can actually help you feel better for real.
Optimism good for body’s immune systemIn a new study, psychological scientists Suzanne Segerstrom of the University of Kentucky and Sandra Sephton of the University of Louisville studied how law students' expectations about the future affected their immune response.

Earlier studies found that people who are optimistic about their health tend to do better, but it's not clear how optimism affects your health - or whether pessimism makes you less healthy.

For the study, the researchers recruited first-year law students by sending them a packet during the summer before classes started. The 124 students that participated in the research were studied at five times over six months. Each time, they answered questions about how optimistic they felt about law school. Then they were injected with material that should summon an immune response & two days later, they came back to 've the injection site measured.

A larger bump in the skin means a stronger immune response. Immune systems are many-faceted- this test only measures the strength of the part that is responsible for fighting viral infections & some bacterial infections. The students' general outlook on life - whether they had an optimistic disposition - didn't account for the differences in immune responses between students.

But as each student's expectations about law school waxed & waned, their immune response followed along. At more optimistic times, they would 've bigger immune responses, while at a more pessimistic time, a more sluggish immune response. So, being optimistic about success in a specific, important domain may promote better immunity against some infections.

"I don't think that I would advise people that they should revise their expectations to be unrealistic. But if people 've slightly more positive views of the future than is actually true, that's adaptive," said Segerstrom.

The study has been published in Psychological Science , a journal of the Association for Psychological Science.

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