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The "world's funniest joke" is a term used by Richard Wiseman of the University of Hertfordshire in 2002 to summarize one of the results of his research .
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One Hundred Interesting Mathematical Calculations, Number 7: Archive Entry From Brad DeLong's WebjournalOne Hundred Interesting Mathematical Calculations, Number 7
This is very interesting. I'm a psychologist, and I remember very strongly one class I took with an amazing professor; we were discussing the notion of IQ as equivalent to intelligence, and he pointed out the very important fact that IQ is a man-made construct. If we did not develop IQ tests, we would not have an IQ, drifting around waiting to be measured.