Quote Originally Posted by Forget My Name View Post
[...]my constructor has 98 in both int and dex, but 2 strength, 3 con and something like 6 psi.
On the other hand it makes sense that a char who is only constructing stuff does not earn PSI or CON. Where should the XP come from when building items? After all he is only sitting in his chamber building stuff. And at least there is the way over missions.

For non-trader chars there is a thread by Bill where Team XP were discussed for gaining XP in the secondary stats, he posted the link.