First, the nature is different.
1, a kind of marginal intelligence and intelligence level grading. According to the IQ value and adaptability, the intelligence level (84 ~ 70) is between normal intelligence (85 ~ 1 15) and low intelligence (below 70).
2. Mild mental retardation is a comprehensive symptom that the genetic system of patients is abnormal due to the influence of environment or heredity, and the mental development stops due to various reasons before birth, at birth or at various stages of early life.
Second, the main performance is different.
1, patients with borderline intelligence develop slower than normal children in abstract thinking ability and language expression ability. They can finish primary school or even junior high school, but their academic performance is getting worse and worse, and they are prone to conduct obstacles such as hitting people. Wang Demin said that students at the bottom of a class often belong to marginal intelligence, and it is difficult for them to enter high schools and universities in the increasingly fierce competition for further studies.
2. Mild mental retardation: The patients with this disease are mainly characterized by lower social adaptability and poor understanding, but they can take care of themselves.
Clinical manifestations of mild mental retardation
1, the perception speed is slower, and it is easier to accept the stimulation of visual pathway than auditory stimulation;
2. Serious distraction and narrow attention span;
3, poor memory, after countless repetitions, you can learn some knowledge. If you don't repeat your study, you will forget it completely;
4. Poor verbal skills, only simple words;
5, low thinking ability, lack of abstract thinking ability, imagination and generalization, can not draw inferences;
6, basically have no concept of numbers, and can learn simple addition and subtraction calculations by mechanical memory;
7. Emotional instability and poor self-control.
Refer to the above? Baidu encyclopedia-marginal intelligence, Baidu encyclopedia-mild mental retardation