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The effect of information sentiment on popularity is meaningful to understand the information content on social media. The present research examined whether emotion values of information could predict the potential of popularity in two psychoinformatic experiments. A prime task was used with popular/unpopular information as prime and high/low sentiment stimuli as targets. In Experiment 1, we observed that unpopular information survived better than popular information. In Experiment 2, the electrophysiological priming effect was observed for unpopular and popular information. According to the findings, sentiment of information on social media plays a key role in information popularity.