Shields
Shields mention that you get the associated armor check penalty whether or not you are proficient, but if you are not proficient you also get -5 to reflex defense, and can’t use your dex for defense at all.
This mean that anyone using a light energy shield will get a -2 to his attack rolls, anyone with a medium shield will get a -5 and anyone with a heavy shield will get a -10 as these are included in the normal non-proficiency penalties?