Choose A. Children with IQs below 90 are generally considered to be low-normal children.
Children with normal mental retardation are also called children with mental retardation or mental retardation. Children whose intellectual development is lower than or behind the development level of ordinary children of the same age. There are often differences in degrees of low intelligence. Intelligence tests are usually used to identify children with low intelligence and determine the degree of their mental retardation, expressed by IQ. In our country, the more common method is to divide mental retardation into three categories:
① Those with an IQ between 85 and 50 are mild mental retardation.
②An IQ between 50 and 25 is considered moderate mental retardation.
③An IQ below 25 is considered severe mental retardation.
Extended information:
1. Characteristics
Their cognitive ability and learning ability have the following characteristics: language appears late; perception speed is slow and narrow range ; Poor observation ability; poor coordination of vision and movement; unstable attention and easily distracted; slow memory speed, poor retention, and fast forgetting.
Mechanical memorization is better than meaning memorization; poor abstract thinking ability, not good at analysis and synthesis, difficult to see the essential characteristics and internal connections of things, lack of logic (such as unable to understand the storyline of comic books) ); poor concept of numbers, difficulty in calculation, and no understanding of quantitative relationships in word problems.
Due to the above characteristics of cognitive ability or learning ability, they have a low level of understanding when learning primary school homework, learn slowly, forget quickly, cannot use knowledge flexibly, and have difficulty writing.
Many children with mild hyponormal have studied elementary school homework for three or four years and cannot read the texts or do addition and subtraction within 20; children with moderate hyponormal have even studied five or four years of primary school homework. , six years ago, I can’t even add or subtract within 10.
2. Classification
Children with mental retardation are children whose intelligence is lower than that of ordinary children. IQ testers use IQ to determine how smart or stupid a child is, along with changes in the emotional and volitional spectrum.
Mental retarded children are divided into congenital dementia (mental retardation) and dementia caused by growth factors.
The former has various manifestations: mild dementia, stupidity, idiotism; the latter is the result of brain damage and various mental illnesses.
Baidu Encyclopedia - Mentally Retarded Children
Baidu Encyclopedia - Mentally Retarded Children