[davidthefat]

To be honest, yelling seems to be counter intuitive... Yes, I have yelled at drivers, but mostly due to the background noise. They get more withdrawn and timid because they are afraid to mess up.

Just let them remember that there are just very few chances like this. If your drivers are seniors, this will be their last chance to do something like this. Just remind them that there will never be something quite like a FIRST robotics competition. Also, Seniors tend to have the most experience, they know how things roll and they just want to get things done, not saying that underclassmen don't, but just a generalization.

Also, I find that the more aggressive drivers tend to do better. I have been known to be rather bold when it comes to my strategies regarding robotics. My mentality is: just go for it.