……发生了些什么?在三个半月到五个半月的阶段,孩子发展了伸手触及和抓握东西的本领,就在他接触到物件的时候,他对自己的手十分注意。在五个半月到八个月的这段时间里,孩子则趋向于看他自己的手拿到物件的效果。换言之,在较早阶段,孩子看动作的本身,现在,他则看动作的效果了。  ... What happened? Between three and a half to five and a half months, the child developed the ability to reach out and grab something, and he paid close attention to his hand as he came into contact with the object. During the five and a half to eight months period, the child tends to see the effect of his own hand holding the object. In other words, at an earlier stage, the child sees the action itself, and now he sees the effect of the action.