According to the score of Webster's intelligence test for children, mentally retarded children can be divided into the following types:

Mild mental retardation: IQ 70-55.

Children with mild mental retardation have basic self-care ability and can do simple housework. Early education is very important for its development. They can enter kindergartens and preschool classes to receive early rehabilitation training and preschool special education, and they can attend classes in ordinary primary schools. They have different degrees of difficulty in learning subjects (such as Chinese or math courses), but most of them can complete the basic study at the primary school level and have the ability of language communication in daily life; You can receive vocational education and occupation in youth training, and you can engage in simple professional labor and participate in community life as an adult.

Moderate mental retardation: IQ 55-40

At the same time, it has moderate social adaptation obstacles. Children with moderate mental retardation have certain self-care ability in life, can complete some simple housework, and need the support and help of others in basic life. You can enter preschool education through intervention training, and primary schools may need to accompany you. With appropriate support, they can engage in specialized or productive work under normal working conditions.

Severe mental retardation: IQ 40 to 25.

At the same time, there are serious social adaptation obstacles. Children with severe mental retardation are usually diagnosed shortly after birth and should actively participate in early intervention and training. Their training mainly focuses on self-care, simple language communication and interpersonal communication. After long-term systematic training, the life function of children with severe mental retardation will be significantly improved and their independent living ability will be improved.

Severe mental retardation: IQ below 25.

At the same time, there are extremely serious obstacles in social adaptation. Children with severe mental retardation basically have no ability to live independently, and are often accompanied by various obstacles, including movement obstacles, daily life obstacles, speech communication obstacles, mental illness and so on. They need long-term continuous intervention training and support.

They were diagnosed with autism at the age of 3, but after intervention, it is very likely that they will no longer meet the diagnostic criteria of autism at the age of 5, and will become mildly mentally retarded or just absorbed. Going to primary school at the age of seven is not a dream.