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About one-third of individuals with CP have moderate-to-severe mental retardation, one-third have mild mental retardation, and one-third have normal intelligence.
The old and still popular terms were adjusted downward from normal- Moron ( high and low grade) Imbecile, and Idiot. for some reason Moron and Idiot remain in popular usage but imbecile, even in slang usage is rarely used.
Overstudy does not cause mental retardation.
"Normal" IQ is between 85 and 115. Borderline intellectual funcion is between 70 and 85. Mild MR is between 55 and 69. Moderate MR is between 40 and 54 Severe MR is between 25 and 39. Profound MR is less than 25.
TThere are quite high as it comes in different types of mental retardation.
Borderline mental retardation. It's true, 100 is average.
We have to be very careful with this, because mental retardation cannot be diagnosed knowing only a person's standard IQ score. There must also be serious impairment in two areas of adaptive behavior. If a person can communicate with others, take care of her/himself in regard to daily living activities, and if the person has good social skills, then mental retardation is not an appropriate label for that person. Generally, an IQ below 70 would also be part of the diagnostic picture for someone dealing with mental retardation.
literature review on mental retardation with reference
Exposure to lead can also cause mental retardation.
The term "mental retardation" is generally considered outdated and offensive. People with intellectual disabilities may have a shorter life expectancy due to health complications or co-occurring conditions, but it is not accurate to say that a specific number of people die specifically from having an intellectual disability. It is important to focus on providing proper support and healthcare to improve the quality of life and longevity for individuals with intellectual disabilities.
Mental retardation has different levels. There is Mild intellectual disability; moderate intellectual disability; severe intellectual disability; and Profound intellectual disability.https://www.floridahospital.com/mental-retardation-mr/symptoms-and-signs-mental-retardation