Diagnostic condition
Diagnosis of mental retardation requires the following three conditions, all of which are indispensable. ① The child is in the developmental period (1under 8 years old). ② The intelligence is obviously lower than the average level of normal children. The IQ is lower than two standard deviations of the average (100) (each standard deviation is 15 or 16), that is, the IQ is below 70 or 80. (3) Social adaptability defect, that is, personal living ability does not meet the requirements of age and culture and education.
classify
At present, according to the degree of intellectual development and adaptive behavior, mental retardation can be divided into four categories: mild, moderate, severe and extremely severe.
Mild mental retardation
Refers to an IQ between 55 and 69. Often found because of poor academic performance after school. Children's computing and understanding skills are poor, and their social skills are worse than those of normal children. Although we can't keep up with normal children's learning, we can educate them.
Moderate mental retardation
IQ 40~54, motor development and language development are later than normal children, and they can simply count, but their self-care ability is poor, and their social skills are much worse than those of mild mental retardation. Through training, you can engage in simple physical labor.
Severe and extremely severe mental retardation
IQ is 25~39 and 24 respectively. Such children are often backward in sports development, unable to speak, or even recognize people and count. The ability of self-care is even worse, and some people can't even wash their faces and hands. Very serious children may be completely unable to take care of themselves and need supervision and care from others.