Field test № 03 · two minutes

The Switch Check

Sort each card left or right. Two rules exist: sort by creature, or sort by plate.

The active rule sits above the card. It will change under you. Mid-game, without apology.

The first stretch teaches each rule on its own. Then the rules start trading places, and the cost of every trade gets measured.

Sort by creature: flyers left, grounded right

Sort by plate: warm left, cool right

Task switching, studied since 1927. The measure is switch cost: how much slower and rougher the first response after a rule change runs, compared with staying the course. Transition friction, in milliseconds.