Brooks J, Lewis M
Child Dev. 1976 Jun;47(2):323-32.
Infants respond differentially, and at times with fearlike behavior, to unfamiliar persons. This study was designed to see how infants discriminate among strangers. Since it has been shown that infants respond differently to children and adults, the physical characteristics of persons used to make such differentiations were of interest. Facial configuration and height were systematically varied as 4 different strangers--a male and female child, a female adults, and a small female adult the same height as the children (midget)--each approached 40 different infants. The infants responded as if there were 3 classes of persons--adult, child, and small adult, suggesting that both size and facial configuration cues were used. Infants as young as 7 months of age reacted to the size-facial configuration discrepancy of the small-adult condition.
婴儿对不熟悉的人会有不同的反应，有时还会表现出类似恐惧的行为。本研究旨在观察婴儿如何区分陌生人。由于已有研究表明婴儿对儿童和成人的反应不同，因此用于进行这种区分的人的身体特征受到关注。面部轮廓和身高被系统地改变，由4个不同的陌生人——一个男童、一个女童、一名成年女性和一名与儿童身高相同的成年女性小个子（侏儒）——分别接近40名不同的婴儿。婴儿的反应就好像存在三类人——成人、儿童和成年小个子，这表明他们同时利用了体型和面部轮廓线索。年仅7个月大的婴儿对成年小个子情况下的体型与面部轮廓差异做出了反应。
