从视知觉心理学的角度说,这里的“恒常性”是指人的意识中各种具有稳定倾向的内容,这种“恒常性”使得我们在感知一个外观现象变化不定的世界时不至于晕头转向、无所适从。实际上,我们往往是借助于我们对对象所具有的“一般性”的概念去感受对象的。比如我们不会因为一个人把手伸到我们眼前时就误认为那只手本身突然变大了,不会囿于手的局部现象而忽略我们所知的人的头、四肢各个部分的正常比例这一基本常识。 From the perspective of visual psychology, “constancy” here refers to various stable tendencies in human consciousness that do not make us dazzled in perceiving a world in which the appearance of things is constantly changing , At a loss In fact, we tend to feel the object with the help of our “general” concept of the object. For example, we do not mistakenly believe that a hand suddenly enlarges when it reaches out to us. We do not ignore the partial phenomenon of our hands and ignore the normal proportions of the parts of our limbs as we know them. A basic knowledge.