It is possible for heroes (or NPCs for that matter) to have greater or lesser competency in their individual Abilities or Skills than the default presented in these rules. This is represented in the rules by a Proficiency Adjustment (PA). A positive PA reflects characters who are more powerful than the norm while a negative PA reflects characters who are weaker than the norm.
For each +1 PA on an individual Ability or Skill a character gains a +1 bonus to any use of that trait.
A negative PA works in the opposite manner of positive ones: for each -1 PA the affected trait suffers a -1 penalty to any use of that trait.
No character may have a PA greater than +7 or less than -2 on a single trait.
PAs and RAs stack.