In psychology, the selectivity of perception is the objectivity of perception

Perceptual selectivity acts on people's objective things, which are diverse and cannot be clearly perceived by people in an instant. However, according to a certain need and purpose, a small number of things (or a certain part of things) can be actively and consciously selected as the object of perception, or unconsciously attracted by a certain thing, using it as the object of perception, and producing a distinct and clear perceptual image of it, while taking the rest of the surrounding things as the background of perception, and only producing a relatively vague perceptual image. The selectivity of perception is affected not only by the characteristics of the object of perception, but also by the subjective factors of the perceiver himself, such as interests, attitudes, hobbies, emotions, knowledge and experience, observation ability or analytical ability, etc. The selectivity of perception is inseparable from other properties of perception, and the chosen object of perception is usually complete, relatively stable, and intelligible. 

The basic properties of perception: wholeness, constancy, meaning (comprehension), selectivity. There are only four that have not been heard of about the objectivity of perception that you are talking about.

The characteristics of perception are selectivity, wholeness, comprehension, constancy.

Selectivity refers to distinguishing a small number of things from the background so that they can be clearly reflected.

Wholeness means that the object of perception is composed of different parts and different attributes, but we do not perceive it as individual isolated parts, but always perceive it as an organized whole, and this characteristic of perception is called the totality of perception.

Comprehensibility refers to the fact that people always interpret the objects of perception in terms of their past experiences. The understanding of perception is based on knowledge and experience. Therefore, different knowledge and experience also means that different people may have different understandings of the same thing.

Constancy refers to the fact that when the objective conditions of perception change within a certain range, the perceptual impression remains relatively unchanged.

Types of perception

According to the different objective objects reflected by perception, perception can be divided into: spatial perception, time perception, and motion perception.

Spatial perception: refers to the response of the human brain to the spatial features of objects. It includes shape perception, size perception, orientation perception, and depth perception.

Time perception: It is the human brain's perception of the continuity and sequence of objective phenomena. There are two kinds of time perception: one perception is: what season, what time it is, what time it is. The second is the length of perception of the present moment and a certain moment in the past.

Kinesia perception: It is the perception of the human brain about the spatial displacement of objects. Kinesia perception is divided into true kinesthetic perception and quasi-kinesthetic perception.

Subjective factors influencing perceptual selectivity include: needs and motivations, interests, personality, temperament, experiential knowledge, etc.

Perception is a series of processing processes that organize and explain the sensory information generated by external objects and events, and perception is the "generated" understanding of the whole of things in the mind by the direct action of objective things on the senses.

Perception is a series of processes that organize and interpret the sensory information produced by external objects and events. The knowledge of the individual properties of an objective thing is the sense, and the combination of the various sensations of the same thing forms the knowledge of the object as a whole, that is, the perception of the object, which is the reflection of the objective object acting directly on the sense organ in the human brain.

Selectivity refers to the property of people in the process of perception to distinguish the perceptual objects from the background and give priority to them to be clearly reflected.

The object that is clearly perceived is called the object, and the object that is not clearly perceived is called the background. Distinguishing an object from the background generally depends on three conditions:

1. Relative motion, when the object and the background are relatively moving, and the other is relatively immobile, the object is easy to perceive, and the cavity is like a person who does not open his mouth when singing in a chorus.

2. The difference between the object and the background is not easy to be perceived compared with the smaller the army, such as a white bear in the snow and a soldier in a gilly suit in the grass; The greater the contrast, the easier it is to be perceived, such as the teacher using a red pen to mark a paper.

3. I am familiar with the manuscript, and it is easier to perceive the content that I am familiar with and interested in, such as hearing someone shouting my name in a noisy environment.