I've said before and I'll say it again, "brain training" games -- like those developed by lumosity -- have very little proven
efficacy. Do they change the brain? Yes. But so does just about everything else. Let me explain... there was a story that we used to tell in the lab and it went like this...
"If I throw you a set of keys, and you catch it, there will be neuroplastic change.
If I throw you a set of keys, and you try catch it drop it, there will be neuroplastic change.
If I throw you a set of keys, and you just watch the keys hit the floor, there will be neuroplastic change."
So do "brain traing " games change your brain? Yes. The change your brain to be better at the games. If the end result you want is to be better at the games, have at it, and become better at those games. But are the skills that you gain from these games generalizable to anything else in your life? Not that we know of.
Here is a recent article that says... well, let's put it this way... if you work for luminosity, you'll hate it...
Again, the key word here is "generalizable." Here's another article that makes the same point: "The authors conclude that memory training programs appear to produce short-term, specific training effects that do not generalize."