And Birmingham Uni have been working on a pitchside saliva test machine that detects chemicals released by the body when a concussion happens.
The neck devices are looking to inform long term player welfare decisions, whereas the saliva test is trying to address immediate in game decision making.
I think Cardiff Uni are doing research to see if there is a difference between the mens and womens game. I don't think anybody is looking at kids though, which maybe they should be, if such research could be ethical?
Which is more important, I cannot say. I personally would like to see the saliva test being shown to be accurate and effective, and then come in to use, and be cheap enough that lower levels could use it as well.