Real-time social interactions reveal how we balance cooperation and competition

When people reach for the same object, walk through a narrow doorway, forage for food, or work together on a shared task, they continuously negotiate—often without noticing—how much to cooperate or compete. Unlike classical laboratory games that force players to choose between fixed options in advance, real-life interactions unfold dynamically, with movement timing and subtle cues shaping social behavior from one moment to the next.