Mental or Behavioral Dysfunction
mental retardation
men·tal re·tar·da·tion [ men-tl ree-tahr-dey-shuhn ]
Definitions related to mental retardation:
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A condition of arrested or incomplete development of the mind, which is especially characterized by impairment of skills manifested during the developmental period, which contribute to the overall level of intelligence, i.e. cognitive, language, motor, and social abilities.NICHD Pediatric TerminologyU.S. National Cancer Institute, 2021
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A developmental disorder characterized by less than average intelligence and significant limitations in adaptive behavior with onset before the age of 18.NCI ThesaurusU.S. National Cancer Institute, 2021
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Subaverage general intellectual functioning that originates in the developmental period and is associated with impaired maturation and learning, and social maladjustment. Retardation is commonly defined in term; of IQ: mild (between 50 and 55 to 70), moderate (between 35 and 40 to between 50 and 55). severe (between 20 and 25 to between 35 and -40), and profound (below 20 to 25).Sadock's Comprehensive Glossary of Psychiatry and PsychologyBJ Sadock Titles Press, 2012
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Subnormal intellectual functioning which originates during the developmental period; multiple potential etiologies, including genetic defects and perinatal insults; intelligence quotient (IQ) scores are commonly used to determine whether an individual is mentally retarded; IQ scores between 70 and 79 are in the borderline mentally retarded range and scores below 67 are in the retarded range.CRISP ThesaurusNational Institutes of Health, 2006
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