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I am a lifetime member of lumosity for past few years. they used to have a beta-version game of "Dual-N-Back" which is the only one that might have some impact on brain. The irony is they removed it and keeping the useless ones; even keep modifying the UI of the same games again and again..

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Dual N Back is a test of memory. Where is the evidence that practicing does anything besides decrease the accuracy of the test?

Here is the most comprehensive review of the DnB experiments I have ever seen:

https://www.gwern.net/DNB%20meta-analysis

>This is the website of Gwern Branwen, writer & independent researcher. I specialize in psychology, statistics, and technology

forgive me if i don't take this meta-analysis seriously.

You may not have read any of Gwern's articles before. For many people, the quality of articles they've written in the past is high enough to give them (Gwern) quite a positive reputation. At least I'm likely to click on basically anything written by Gwern.

Critically if you actually read the article you can judge for yourself whether they know what they're talking about, as it's going to be both incredibly in depth and include disclosures of basically all caveats.

actually dual n back skills are also non-transferable.

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