Page 115 - Modern Robotics Building Versatile Macines
P. 115
THOUGHTFUL ROBOTS 95
and rescanning—programmed by evolution to pay attention to the
things that are responsible for physical survival and social success.
Thus, the main clue that someone is paying attention to another
person is whether they maintain eye contact. Even an infant can tell
whether its parent is looking at it. At an age of about nine months, a
baby knows when the parent is looking at something else. Gradually,
the child learns how to track from the parent’s eyes to the distant
object.
In the human eye, the concentration of nerves (and thus of image processing
power) is at the fovea, the center of the field of vision.
