Psychologists at the University of Virginia in Charlottesville surveyed a sample of mostly white children at age five, seven, and 10. The children rated how much pain they expected two other children -- one black and one white -- would feel in certain situations, like biting their tongue, or hitting their head. The five-year-olds reported that the two children would feel about the same amount of pain. But a weak racial bias emerged in the seven-year-olds, and by age 10, the children showed a "strong and reliable racial bias" in that the white child would feel more pain than the black...