I'm running a campaign with six player characters. Since it's a larger group, they occasionally split up. During these times, individual groups have gotten into encounters and been awarded XP.
My question is, does this XP get split evenly among the group present at the encounter or does the entire party, including the non-present group, receive XP evenly across the board?
For my specific example, the party members aren't far away from each other completing their own quests. One group of 3 went down into a house's basement and reaped XP from an encounter; while, the other group of 3 was on the 2nd floor and was totally unaware of the encounter.