Does the PRIMEVAL INSTINCTS bonus stack?

[scp]

Subject kindof says it all, but, here's my question:

Does the +4 bonus provided by PRIMEVAL INSTINCTS stack with other attribute modifiers?

[Arduin]

Yes, you add it on top of any mod for the physical attribute check. If it is a Str check and the barbarian has a +1, the total for that check is +5. Read carefully when and when one can and cannot use the +4 though...

[scp]

Thanks!

[serleran]

I don't even bother with the bonus. I just allow the barbie one physical attribute check per day that can be automatically successfully.