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Disappointed by the tasks they chose. This is because the data is collected in a lab but we have so much more data these days.

Does anyone work for Udacity/EdX/Coursera? I would be interested to know if/how performance on those courses decline/improve with age.

It would also be interesting to see if performance is correlated because of lurking third factor. (My money is on exercise, or time).

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Performance in MOOCS (or any educational setting) != Intelligence or ability to perform

I guess I'm more interested in whether my ability to learn machine learning (or whatever the equivalent is in 10 years) will decrease over whether I'll be able to remember a 7 digit number.

Call that what you will.

I am confused about what you consider "ability to perform". Education is a context for performance.

The theory is that your ability to memorize a 7 digit number (working memory) IS fluid intelligence.

The problem is that memorizing an x digit number is proven to be trainable, without much carry over to g or even other working memory tasks. I.e. - it's hard to train fluid intelligence rather than train the specific task which it is applied to.

> performance in educational setting != ability or intelligence

especially when the educational setting has an incentive to increase their performance metrics (not the same as standards)

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