The scale by which your character will measure how easily they notice strange things around them.
0: Absolutely no awareness of what is happening around them.
1: One who pays nearly no attention to whats happening around them.
2: The average amount of perception one might be gifted with. You'll notice an angry mob coming towards you, but maybe not the person slipping in to the shadows behind you.
3: You see what's going on, and you know why it happened.
4: Behaves as though they had eyes in the back of their head.
5: Completely aware of everything happening around them at all times.
6: They likely know the thing is going to happen before it happens.