BOYD E S, GARDNER L C
Science. 1962 May 18;136(3516):648-9. doi: 10.1126/science.136.3516.648.
Tests in which an animal receives or avoids direct electrical stimulation of its brain according to its position in the tank as well as tests of free operant behavior demonstrate the existence of both positively and negatively rewarding areas in the brain of the goldfish.
在这些实验中，动物根据其在水箱中的位置接受或避免对其大脑的直接电刺激，以及自由操作性行为测试，都证明了金鱼大脑中存在正性和负性奖励区域。
