A few researchers set out to determine the optimal length of chopsticks for children and adults. They came up with a measure of how effective a pair of chopsticks performed, called the "Food Pinching Performance". The "Food Pinching Performance" was determined by counting the number of peanuts picked and placed in a cup (PPPC).
The idea was taken from http://blog.yhat.com/posts/7-funny-datasets.html
https://bmdatablog.files.wordpress.com/2016/04/chopsticks.pdf
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