People can have low mental age and intelligence quotient {retardation}| {mental retardation}. Subnormal maturation, learning, intelligence, adaptation, and social functioning are like arrested or incomplete mind development. In USA, retarded and handicapped children are ten percent of children. Four people per thousand are slow in social and occupational situations.
classification
Lowest IQ range is 0 to 25 {profound mental retardation}. Next lowest IQ range is 20 to 39 {severe mental retardation}. Middle low IQ range is 36 to 54 {moderate mental retardation}. Higher low IQ range is 52 to 69 {mild mental retardation}. Low IQ range is 68 to 84 {borderline mental retardation}.
causes
Poor nutrition, drugs, rubella, syphilis, age, irradiation, Rh factor incompatibility, low oxygen at birth, and birth injury impair mental development.
differences
If asked to think about their experiences, low-IQ and high-IQ children differ less than expected.
Social Sciences>Psychology>Intelligence>Levels
6-Psychology-Intelligence-Levels
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Date Modified: 2022.0224