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James_Miller comments on N-back news: Jaeggi 2011, or, is there a psychologist/statistician in the house? - Less Wrong
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Comments (22)
There's no passive control because there are only 62 kids. Only spend as many kids as it takes to publish.
I would not expect a generalized training effect. Almost nothing exhibits cross-test training. People are excited about n-back because it is the only test that is said to.
That's unfair. Getting 62 kids for this study must have been difficult. You don't know what the costs would have been to get a few dozen more.
I said "spend kids," so the cost of acquiring them is irrelevant. I'm sure they're expensive, so I keep them fixed. If there were half as many studies each with twice as many subjects, they would be much more valuable. But they wouldn't be publishable, because they'd all have negative results.