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servo_sausage | 6 days ago

Every study like this needs to adjust for common compounding factors; demographics, income, teaching methods, covid...

Otherwise it's junk data, we have have no idea if lower performance is due to more migrants, more computers, less sugar in cereal or whatever.

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moi2388|6 days ago

Yes. And follow them as cohort. Do they start behind? Or gradually got worse? Or actually improved more than the previous generations?