Looks like it's overfitting - the tasks in the video game (based on the demo vid) are very similar to the task used to measure changes in attention (test retest!). Sample size could also be bigger.
>If she does not understand or employ traditional feminine wiles that, offensive though it may be to admit, are necessary to getting along in a patriarchy?
Transcranial direct current stimulation has been around for around 20 years, and it directly employs the concept he is experimenting with. Being able to more granularly map electrical activity to actions will greatly improve it as a non-invasive method of controlling the brain (which should be exciting but concerning ...)