As far as I know, replications showed an effect size that's still pretty amazing...

		red_admiral 3 days ago \| parent \| context \| favorite \| on: New AI tutor achieves 0.71-1.30 SD effect size in ... As far as I know, replications showed an effect size that's still pretty amazing by educational standards but nowhere near z=2.0 (I think z=0.6 is the current best guess).
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