As much of the research in BCIs this one is more of a feat in engineering rather than science. What is the ultimate goal of the study? We know that flashing sti

As much of the research in BCIs this one is more of a feat in engineering rather than science. What is the ultimate goal of the study? We know that flashing stimuli cause a response in a brain (this is called Steady State Visual Evoked Potential or SSVEP and is studied a lot). We know that a TMS device can cause receiving person to perceive flashes. This game could be fun and all, but it is a technology demo and ability to say "I did this first". Another thing, SSVEP has two modes of action, one is based on vision and the other on attention. That is: if somebody is just looking at a flashing light, the signal is clearly visible in the occipital region of the scalp but this is _not_ brain signals, it is a signal from the optical nerve. It is (according to a paper) possible to consciously control the SSVEP response amplitude (for example with the two flashing targets in the peripheral vision and an eye-tracker that ensures that the subject is not actively looking at a target, merely concentrating on one). This response will be of lower amplitude but will come from the brain.