I'm searching for a single-word descriptor that means "mental quickness", "mental reaction speed" or very similar with little additional connotation (unlike alacrity or wits).
EDIT: The word has to be able to stand on its own like an icon; I can't rely on context for meaning. It is an attribute for a table-top role playing game. The character will have a score or rating to represent how mentally quick they are that they will need to call up readily during a game. The word doesn't need to imply that their reactions are correct or accurate, only fast.
EDIT 2: The game is set in the mid-near future and is Post-Cyberpunk in nature. Any words that reflect that setting are especially helpful.