Brain Training in PLoS One: http://www.plosone.org/article/info%3Adoi%2F10.1371%2Fjournal.pone.0055518

Brain Training Game Boosts Executive Functions, Working Memory and Processing Speed in the Young Adults: A Randomized Controlled Trial

Rui Nouchi, Yasuyuki Taki, Hikaru Takeuchi, Hiroshi Hashizume,Takayuki Nozawa, Toshimune Kambara, Atsushi Sekiguchi, Carlos Makoto Miyauchi, Yuka Kotozaki, Haruka Nouchi, Ryuta Kawashima

The title seems to accurately tell the results of the experiment. Training was Nintendo BrainAge versus Tetris in a randomized controlled trial design.  WM & PS went up in participants who did BrainAge >> Tetris (Simple Reaction Time went up in Tetris).  Participants were young, mean age 20, n=16 per group.  Training was 15m/day 5 days/week for 4 weeks.  Somewhat surprisingly strong results for relatively low total hours of training in younger adults.  Recruiting, compliance, retention look very strong though.  I guess you could worry about expectancy effects but everything else looks very solid.  A big, elaborate assessment battery was used.  I haven’t looked at every piece of it, but Ravens (RAPM) curiously went up a lot in both groups.