Sackett G P
Science. 1966 Dec 16;154(3755):1468-73. doi: 10.1126/science.154.3755.1468.
Monkeys reared in isolation from birth to 9 months received varied visual input solely from colored slides of monkeys in various activities and from nonmonkey pictures. Exploration, play, vocalization, and disturbance occurred most frequently with pictures of monkeys threatening and pictures of infants. From 2.5 to 4 months threat pictures yielded a high frequency of disturbance.Lever-touching to turn threat pictures on was very low during this period. Pictures of infants and of threat thus appear to have prepotent general activating properties, while pictures of threat appear to release a developmentally determined, inborn fear response.
从出生到9个月一直处于隔离状态饲养的猴子，仅从展示猴子各种活动的彩色幻灯片以及非猴子图片中获得不同的视觉输入。探索、玩耍、发声和不安行为在看到猴子威胁的图片和婴儿图片时出现得最为频繁。在2.5到4个月大时，威胁图片引发了高频率的不安行为。在此期间，通过按压杠杆来打开威胁图片的行为频率很低。因此，婴儿图片和威胁图片似乎具有强大的一般激活特性，而威胁图片似乎会引发一种由发育决定的、天生的恐惧反应。
