One study published in Women’s Health Magazine and conducted at John Hopkins Medical School looked at whether humor can sharpen your thinking. The professor, a psychologist and PhD himself, divided the 98 students in his graduate biostatistics class (I get sleepy just thinking about that class!) into two groups for an exam. Using the identical 57-item exam, he wrote humorous exam instructions for one group, and made sure the other group’s exam instructions were not funny. The group that took the test with humorous instructions scored significantly higher on the exam.

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