Recovering strain: Cool check, or Presence stat?

By Cornelius1, in Star Wars: Edge of the Empire RPG

How much strain does a PC regain after an Encounter? The Beginner Box says we just automatically give each character an amount of strain equal to the higher of Cool or Presence. But somewhere I read an alternative view -- that each PC should roll a Cool check after each encounter. I can't find the rule in the Core Rulebook; the index isn't helping me. What do you guys do?

CRB p.220. A simple Discipline or Cool check at the end of each encounter.

Many thanks!

NP, enjoy.