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Flawed Algorithms Are Grading Millions of Students’ Essays (vice.com)
7 points by elorant on Aug 21, 2019 | hide | past | favorite | 1 comment



> That combination of results, Williamson and the other researchers wrote, suggested many students from mainland China were using significant chunks of pre-memorized shell text.

Well, that's one heck of a way to game an AI!

It reminds me of the confucian exam system [0] where you had to just straight up memorize a huge book of Master Kong's scripts and hope the person that re-copied your work did so too.

> ... they found that the machine boosted students from China by an average of 1.3 points on the grading scale and under-scored African Americans by .81 points.

Note that this is on a 0-5 point scale. So that says that the mean for the Chinese students was ~26% higher than the human grade and for African American students it was ~16.2% lower. The Chinese students could be considered (very roughly) to be boosted from a C- to an A+, and the African American Students from an A+ to a B-, for comparison.

What a mess.

[0] https://en.wikipedia.org/wiki/Imperial_examination#Details_o...




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