Perceptual Cognition

The direct reflection of the external world, formed by people on the basis of practice through the sense organs, is the knowledge of all aspects of things and external connections. The perceptual knowledge is characterized by image, and its content is a reflection on the phenomenal side of things. In perceptual knowledge, the human brain not only reflects the individual attributes of the objective object, but also connects the various attributes of the object to form a reflection of the overall image of the objective object, and also reconstructs and reproduces the image of the object that was perceived in the past in memory, so as to reflect the things that have not acted on the sense organs at this moment. These are the three interrelated forms of perceptual knowledge: sensation, perception and representation.

Sensation is the direct reflection of individual attributes and aspects of objective things by human sense organs, such as human vision, hearing, touch and so on, and it is the starting link of perceptual knowledge as well as the whole cognition.

Perception is the overall reflection of human sensory organs on the external characteristics of objective things, and for instance, if the sensation of color, fragrance and taste are combined, the overall perception of an pear is to be formed.

Image is an advanced form of perceptual knowledge, which is formed by human brain on the basis of past feelings and perceptions, and it is the reproduction of objective phenomena that once acted on the sense organs. Perceptual knowledge is the lower stage of cognition development, and the perceptual stage of knowledge needs to be developed to the rational stage.