How to choose programmers?

[GeeTwo]

We did tryouts this year for the first time. Everybody who didn't make varsity last year had to try out (tryouts were given by members and varsity). Everyone had to do all the tryouts, including some mechanical, wiring, and programming tasks. We kept track of both attitude and aptitude. We selected members primarily on attitude, and assigned them to departments based on a combination of aptitude and their preferences. We know we always have to get a lot of programmers to start, because there will be those who don't properly engage or get it in a couple of months. Some of these leave the team (most just stop showing up; we get this in every department), others move to other departments.