The billion dollar question: Under what conditions can brain training result in real-world benefits?

. Does any­one care if “brain games” actu­al­ly work? (For­tune): “The cog­ni­tive fit­ness mar­ket — loose­ly defined as non-inva­­sive neu­rotech­nolo­gies that mon­i­tor or enhance cog­ni­tion — is booming…The “brain game” indus­try is already a bil­lion dol­lar mar­ket, and will reach the $6 bil­lion mark with­in the next five years says Sharp­Brains, a neu­ro-well­­ness mar­ket research…

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