“Rozin’s team began by analysing a corpus of 100 million words of spoken and written English and found that positive words are used far more often than negative words – just as you’d expect if positive events are more common (to take one example, ‘good’ is mentioned 795 times per million words compared with 153 mentions per million for ‘bad’).”
http://digest.bps.org.uk/2010/06/how-language-reflects-balance-of-good.html
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