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      Unlimited Knowledge Awaits.

      Mind & Brain

      Quiz: How Happy Are You?

      Answer these 11 simple questions to compare your score with worldwide data

      • By Ingrid Wickelgren on October 28, 2011
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      ABOUT THE AUTHOR(S)

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        Ingrid Wickelgren is a freelance science journalist based in New Jersey.

        Recent Articles by Ingrid Wickelgren

        • Newfound Brain Switch Labels Experiences as Good or Bad
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