It's not related to language, but this faculty is one of the two canonical examples of perceptual narrowing as infants age. In a study of dog-show judges, Diamond and Carey showed that the inversion effect is not unique to this faculty. Hayden Ellis proposed that defects in this faculty are the cause of the Capgras delusion. Inversion (15[1])strongly impairs this faculty in the (*) Thatcher effect. (10[2])Nancy Kanwisher (10[1])proposed that the FFA in the fusiform gyrus specializes in this faculty. (10[1])This faculty is affected by the other-race effect, in which people are more capable of doing it when interacting with someone of the same race. The story of “Dr. P” is related in an Oliver Sacks book titled for someone with a disorder of this faculty. For 10 points, which faculty is impaired in prosopagnosia? ■END■ (10[1])