The reasons for the forgetting of human memory are not only physiological, such as forgetting due to illness, fatigue and other factors, but also psychological.

There are four main reasons for this:

The theory of trace decay mainly emphasizes the influence of physiological processes on memory traces, and believes that forgetting is the result of the gradual weakening of memory traces due to the lack of reinforcement, and finally fades.

Memory traces are temporary neural connections formed by relevant parts of the cerebral cortex during activities such as perception, thinking, emotion and action.

Under the influence of the stimulus, the traces are activated, the temporary neural connections are restored, and the past experiences that remain in the human brain are expressed in the form of recollection or recognition.

Some have not been strengthened, and gradually decay over time, causing oblivion.

The theory of memory memory decline has not been accurately and effectively proved by experiments, but its explanation is close to common sense, just as some physical and chemical traces will disappear over time, and it is easy for people to accept.

The theory of interference holds that forgetting is caused by mutual interference between the sequential materials that are recognized.

Proactive and backward suppression are strong examples in support of the interference theory.

Repression is a theory that forgetfulness is due to the suppressive effects of emotions or motivations, and that if the repression is lifted, the memory can be restored.

This theory is valid to explain the temporary forgetting of emotion-related content.

Experiences that cause unpleasantness, pain, and sorrow often lead to motivational forgetting.

Assimilation theory holds that forgetting is the process of simplifying the organization and cognitive structure of knowledge.

When people learn higher concepts and laws, the higher concepts can replace the lower ones, so that the lower concepts are forgotten, thus simplifying the understanding and reducing the memory.

In true meaningful learning, successive learning is not interfering with each other but promoting each other, because meaningful learning is always based on the original learning, and the later learning is the deepening and supplementation of the previous understanding and learning.

Recognizance is a mental process that can be recognized and confirmed when something experienced in the past reappears.

In the process of recognizing, the speed of recognisance of different materials is different for different people, which is related to the factors affecting recognization.

These factors are: the degree to which the previous experience is consolidated.

If past experience is maintained clearly and accurately, it is generally possible to confirm it quickly and accurately when it recurs.

If generalization has occurred in past experience, it is easy to make mistakes in recognizing. The degree to which the original thing is similar to when it reappeared.

The higher the degree of similarity, the faster the rerecognition, the worse the accurate similarity, the more difficult and slow the rerecognition, and the greater the possibility of recognizing errors.

Depending on personality characteristics, the speed of people's mental activity and the speed of behavioral reactions are also different.

There is a clear difference between the re-identification of people who are independent and those who are dependent.

When it is difficult to recognise, people often have to look for clues to recognise, and through the clues, they can achieve recognisance of things.

Clues are the fulcrum of re-recognition, such as the re-recognition of friends who have been reunited after a long absence, and generally take certain physical characteristics as clues for re-recognition.

Memories are the process of reproducing things experienced in the past in the mind under the influence of certain triggers.

For example, when answering a general's question, a soldier should extract the knowledge related to the question that he keeps in his mind, and this extraction process is called recall.

Memories can be divided into two main categories: they can be divided into intentional and unintentional memories according to whether they are purposeful or not.

Intentional recall is the recollection of past experiences for a predetermined purpose, such as the recollection of exam content.

Unintentional memories are memories that occur naturally without a predetermined purpose, such as touching a scene.

According to whether there are mediating factors involved in the recall process, recall can be divided into direct recall and indirect recall.

Direct recollection is the recollection of old experiences that are directly evoked by current things.

Indirect recall is a recall that takes place with the help of mediated factors.

In terms of difficulty, indirect recall is more difficult than direct recall.

According to the content of memory, memory can be divided into four types.

The first is image memory, that is, the memory with the image of perceived things as the content is called image memory.

These specific images can be visual, auditory, smelly, tactile or gustatory, such as the memory of a painting that people have seen and a piece of music that they have heard is a figurative memory.

The distinguishing feature of this type of memory is the perceptual character of preserving things, which is typical of intuition.

The second is emotional memory, which is the memory of emotions or emotions experienced in the past as the content.

For example, the memory of the happy mood of the general when he received the victory and victory.

In the process of understanding things or interacting with people, people will always have a certain emotional color or emotional content, and these emotions or emotions are also stored in the brain as the content of memory and become part of people's psychological content.

Emotional memory is often formed once and never forgotten, and has a great impact on people's behavior.

For example, a general's first impression of a soldier will greatly affect the attitude and behavior of the soldier, because this impression is linked to emotions.

The image of emotional memory is sometimes more persistent than other forms of memory imagery, and the emotional experience is maintained even though the fact that caused a certain emotional experience has long been forgotten.

The third is logical memory, which is the memory of ideas, concepts or propositions, such as theorems, formulas, philosophy, etc.

This type of memory is based on abstract logical thinking, and has the characteristics of generalization, comprehension, and logic.

The fourth is motor memory, that is, motor memory.

It is a memory of people's past operant behaviors.

All the actions and action patterns that people keep in their minds belong to action memory, such as the actions of soldiers during training, martial arts routines, and operation processes, which will leave certain traces in their minds.

This kind of memory is of great significance for the coherence and precision of people's movements, and is the basis for the formation of motor skills.

The above four forms of memory are not only different, but also closely linked, such as action memory has a distinct image.

Logical memory is difficult to maintain for a long time without emotional memory.

According to the preservation time, instantaneous memory: instantaneous memory, also known as sensory memory, refers to the short-term retention of stimulus information in the sensory channel after the stimulation of people stops.

Information is kept for a short period of time, usually between a few seconds and a few breaths.

The content of instantaneous memory can only be realized after attention and enters into short-term memory.

Short-term memory is a memory that is kept for about a few tens of breaths, and if it is not repeated, it will decline or disappear in a short period of time.

Some people believe that short-term memory is also working memory, which is a kind of memory that serves the current action, that is, the short-term extraction and retention of the memory content required by the person in the working state.

Short-term memory has three characteristics:

The memory capacity is limited, and the "block" is the memory unit, and the size of the block varies depending on the person's knowledge and experience.

A block can be a word, a word, a number, or a phrase, sentence, word list, etc.

Short-term memory is mainly auditory coding, but also visual coding, and the content generally needs to be retold before it can enter long-term memory.

Long-term memory refers to the memory that is retained in the mind for a long time after the information has been fully and deeply processed.

From the perspective of time, any memory that is kept in the mind for more than one cup of tea is a long-term memory.

Long-term memory has a large capacity, and the stored information is also encoded in meaning.

People often talk about good or bad memory, mainly referring to long-term memory.

Although the instantaneous memory system, short-term memory system and long-term memory system each have their own characteristics of information processing, they are continuous and closely related from the perspective of time connection.

Representation is the reproduction of things that have been perceived in the past.

Since appearance is an important content and form of memory, appearance is also called memory appearance.

Appearances are generally formed on the basis of perception, and due to the different sensory organs that play a major role, appearances can be divided into different types such as visual appearances, auditory appearances, tactile appearances, and motor appearances.

Although appearance is formed on the basis of perception, it is actually free from the limitations of perception and has its own obvious characteristics.

Appearance is the basis of a soldier's learning, and he must make extensive use of memorization in order to understand and acquire knowledge, and to continue to advance and improve in training, otherwise, it will lead to backwardness in training.

There are many poorly trained soldiers who lack the ability to observe and have too little storage of appearances in their heads.

Figurativeness is intuitiveness, which refers to the characteristics of the appearance maintained in the mind in the form of vivid and concrete images, and has a certain resemblance to the past perception.

Since there is a process of processing representation in the mind, there is a difference between the imagery of appearance and the perceived image.

These differences are mainly manifested in:

The appearance is not perceived, the image is distinct, concrete, and vivid, and it is dull and ambiguous. It is not as complete as perceiving the image, with fragmentation and fragmentation.

It is not as good as perceiving that the image is stable, shaky, and changeable.

For example, the image of the building seen when standing on the square is concrete, concrete, complete and stable, but when the building is recalled, the clarity and integrity of the appearance that appear in the mind are relatively poor.

The image of a thing reflected by an appearance is not a specific thing or its individual characteristics, but a common feature of a class of things, and it is a kind of kind of thing image, which is also another difference between appearance and perceptual image.

For example, the image of the bow and arrow we see is concrete, but when we recall the bow and arrow, its image always has the characteristics common to the bow and arrow, and it is a generalization of the image of things like "bow and arrow".

However, the generalization of appearance is different from the generalization of thinking, the appearance is the image summary of a class of things, while the generalization of thinking is the generalization of the essence and laws of things, which is generally an abstract generalization.