WAFV;
Box doesn't move. Stays in centre screen. It's light grey and at random times goes black. Easier said then done. It's like the group bourdon. After 10mins the box may appear to go black or show signs of getting darker when nothing's happening. Your task is to hit the green button when it goes black. Like GB test, consistancy, time and accuracy. Quicker you hit the green button when the square goes black the better. ( it makes more sense when doing it. To practice; when driving about, everytime you see a '64 plate' car, tap your leg. Could even choose 15 plates, not many of them at moment so keeps you on the ball.)
ATVAT
Pictures appear for less then a second. Lol
It's having memory and understanding what things are. Sounds stupid but a small 'pedestrian crossing' sign under a traffic light could get missed for instance as someone is looking at the bigger picture. ( no pun intended )
The test is straightforward, in fact most are. It all depends on the person doing them.
The good thing for you is, with stage 2 tests, by even practicing, that will have little effect. The key is to understnad what the task is and the practice guides ( comes from the TOC) have the best examples. For the other test ( getting the ball around a shape ) Tetris will help. Can get them on the iPhone now day. Will help with finer movements.
If you don't understand a test on the day then ask.
They are not in place to catch someone out.