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Chew on this

If you want your participants to sit up and pay attention, give them some gum. Yup, it seems that there's some recent research that suggests chewing gum helps make you more attentive and perform better on tests. Unfortunately, the boost in brain power only lasts 20 minutes, but still, maybe it's time to replace those little dishes of mints and hard candies with sugarless gum?

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