Tweets reveal patterns of good mood, bad mood

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Associated Press

Posted on September 29, 2011 at 11:30 AM

Updated Thursday, Sep 29 at 12:03 PM

WASHINGTON (AP) — People tend to wake up in a good mood -- and they are happiest on weekends.

That trend is confirmed by a study of Twitter activity. Researchers looked at English-language tweets from 2.4 million in 84 countries. They used a computer program that searched for words indicating positive mood -- happy, enthusiastic, brilliant -- or negative mood -- sad, anxious, fear.

They found that unless you're a night owl, a positive attitude peaks early in the morning and again near midnight. It starts to dip in mid-morning before rising again in the evening.

But it's not just work-related stress that causes that dip. A researcher points out that the same midday dip occurs on the weekend. He says the pattern is probably due to the effects of sleep and our 24-hour biological clock.

The study appears in the journal Science.

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