用高等脊椎动物建立条件反射是比較容易的,用低等的魚、鳅或爬行类来建立条件反射就比較困难。例如用声音或颜色使魚类建立取食的条件反射則往往須經数百次甚至千次方能成功。可是在我国古代却有着出色的例子。宋时周密所著的《癸辛杂识》后集有一篇題名《故都戏事》的笔記,是叙述他在追忆童年时跟他 It is relatively easy to establish conditioned reflections with higher vertebrates, and it is more difficult to establish conditioned reflections with lower fish, loach or reptiles. For example, conditioned reflections that establish the feeding of fish by sound or color often require hundreds or even thousands of passes. However, there are excellent examples in ancient China. A collection of the notes entitled “Gudu Nephew”, written after the close-knit “Guixin” in the Song Dynasty, is a narration that he told him when he recalled his childhood