"The largest-ever study of natural language and its emotional capacity has found that the most commonly used words in human language across different cultures remain to carry positive connotations than negative ones. The study published in the journal PNAS is considered to be the first one to use a massive data to establish the Pollyanna hypothesis. It is a notion that states humans are fundamentally happiest when socializing." - Sean McBride

"They tested the hypothesis with a set of tools that were not available in 1969. The researchers have gone through Twitter, the New York Times, the Google Books Project, Google's Web Crawl, and a library of movie and television subtitles and song lyrics to come up with a list of around 10,000 most commonly used words in each of 10 languages. Languages included English, Spanish, French, German, Brazilian Portuguese, Korean, Chinese, Russian, Indonesian and Egyptian Arabic. In the next phase, the researchers asked native speakers of each of those languages to rate how they felt in response to each of those words on a nine-point scale." - Sean McBride