The key characteristic of the Allen Curve is the sudden steepness that happens at the eight-meter mark. At distances of less than eight meters, communication frequency rises off the charts. If our brains operated logically, we might expect the frequency and distance to change at a constant rate, producing a straight line. But as Allen shows, our brains do not operate logically. Certain proximities trigger huge changes in frequency of communication. Increase the distance to 50 meters, and communication ceases, as if a tap has been shut off. Decrease distance to 6 meters, and communication
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