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Fig. 10.1. Measuring newborn face preferences. A few minutes or hours after birth, human infants are presented schematic stimuli, measuring how far to the side their eyes or head track each stimulus. The experimenter does not see the specific pattern shown, and neither does the observer who measures the baby's responses. Face preferences have been found even when the experimenter's face and all other faces seen by the baby were covered by surgical masks. Reprinted with permission from Johnson and Morton (1991), copyright 1991 by Blackwell.