1, first-degree mental disability (extremely severe): IQ value is below 20 or 25. The adaptive behavior is very poor, and the face is obviously dull; All life needs the care of others; Motor sensory function is extremely poor, such as through training, only in the lower limbs, hands, chin movement.
2. Secondary mental disability (severe): IQ is between 20 and 35 or 25 and 40. Poor adaptive behavior; Life ability is difficult to take care of itself even after training, and it still needs the care of others; Sports and language development are poor, and the ability to communicate with people is also poor.
3. Third-degree mental disability (moderate): IQ is between 35 and 50 or 40 and 55. Incomplete adaptive behavior; Incomplete practical skills, such as self-care ability, can do simple housework; Have preliminary knowledge of health and safety, but poor reading and computing skills; Poor ability to distinguish the surrounding environment, able to communicate with people simply.
4. Grade 4 mental disability (mild): IQ value is between 50 and 70 or between 55 and 75. Adaptive behavior is lower than the average person's level; Have considerable practical skills, such as self-care, can undertake general housework or work, but lack skills and creativity; Generally can adapt to the society under the guidance; After special education, you can acquire certain reading and computing skills; Have a good ability to distinguish the surrounding environment and communicate with people properly.
Criteria for identification of intellectual disability:
First-degree mental disability (extremely severe): IQ is below 20, and the level of adaptive behavior is extremely lacking;
Secondary mental disability (severe): IQ value is 20-34, and the level of adaptive behavior is seriously insufficient;
Third-grade mental disability (moderate): IQ value 35-49, moderate adaptive behavior level;
Level 4 mental disability (mild): IQ is 50-69, and the level of adaptive behavior is slightly defective.
To sum up, you can apply for a disability certificate as long as you reach the disability level of 1 to 9.
Legal basis:
Practical evaluation criteria for the disabled in China
Second, the classification of intellectual disability
In order to compare with international data, according to the classification standards of the World Health Organization (WHO) and the American Association for Mental Retardation (AAMD), the grades of mental disability were classified according to intelligence quotient (IQ) and social adaptive behavior.