Comparing the quality of crowdsourced data contributed by expert and non-experts.

PLoS One · 2013 · PMC3729953 · PMID 23936126

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hedged sentence

0.0001

closest p · 0.0× alpha

0.0001

boldest claim

The sentences

highly significantp<.0001actually significant

This difference was determined to be highly significant (p<.0001; number of trials = 1500; number of successes = 1139) using a binomial test and therefore the accuracy in estimating land cover actually increased in the final stages of the competition.

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