Awarding people money for doing well in IQ tests causes them to score better, $10 increased people's score by an average of more than 20 IQ points. IQ tests don’t just measure intelligence - they also measure effort.
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Nearly 10% of American households dress their pets in Halloween costumes.
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Just one in three consumers pays off his or her credit card bill every month.
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47% of people have a nightmare at least once a month.
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Yawns are more contagious among people with closer relationships.
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76% of Americans celebrate New Year's Eve in groups of less than 20.
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