Of course he's expressing an opinion. He says we don't know how to raise cognitive ability. That is just not true.
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the statistical analyses to show increases in general intelligence instead of just IQ are complicated and require lots of subjects and tests
The easiest method that doesn't require a lot of fancy stats is examining far transfer gains. E.g. WM training -> vocab gains.
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Evidence does not support far transfer claims, however. http://journals.sagepub.com/doi/10.1177/1745691616635612 …pic.twitter.com/TDtC7hjH1a
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Agreed on no transfer to g, but as I've argued no far transfer is not evidence for the immutability of intelligence http://www.johnprotzko.com/wp-content/uploads/2016/11/Protzko-2016.-Cog-training-and-the-structure-of-g.pdf …pic.twitter.com/qlmNR3gqPY
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With all these heretical views, you will soon have to join the outcasts in the IQ fringe! Better watch out! ;)
End of conversation
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