How social media reflects our daily mood changes. Researchers from the University of Bristol in the United Kingdom have used a dataset of more than 800 million Twitter messages to evaluate how collective mood changes over the course of 24 hours and across the seasons.

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How social media reflects our daily mood changes. Researchers from the University of Bristol in the United Kingdom have used a dataset of more than 800 million Twitter messages to evaluate how collective mood changes over the course of 24 hours and across the seasons.