Subjects played a computerized driving game in which the player must avoid crashing into a wall that materializes, without warning, on the roadway.

受试者玩了一款电脑驾驶游戏，在游戏中，玩家必须避免撞上一堵墙，而这堵墙在没有警告的情况下就会突然出现在公路上。