Hi, I'll try to help you guys out.
Basically you will do a simple maths test and then a reactions/memory game on the computer. I had the group interview/assessment that you will be doing and I didnt get in. However my scores on the tests were better than some people who did get on to the training programme. Therefore my advice would be to not worry too much about the tests and just make sure you do a strong CV and speak well infront of the group when you are asked to introduce yourself. Schneider claim that only the lucky few are invited to attend the group assessment but based on my experience Im certain they invite everyone who applies and then look at the CVs afterwards.....and mines a shocker!
Hope that helps and good luck.