Change in warmth toward the other party after game
On a scale of 0 (very cold) to 100 (very warm). Warmth spiked immediately after the game and sustained above zero for four months after.
Line chart showing the change in warmth toward the outgroup in a controlled study at Harvard. For both Republicans and Democrats, warmth toward the outgroup spiked immediately after playing the game, and sustained above zero four months after.
