A condition characterized by significant limitations both in intellectual functioning and in conceptual social and practical adaptive skills, known as mental retardation (or intellectual disability).
Mental Retardation below normal intellectual ability that originates during the developmental period. Mental retardation is associated with impairment in maturation, learning and/or social adjustment. In general with mental retardation, the IQ is equivalent to or less than 70 and the condition is present from birth or infancy. Individuals with mental retardation have abnormal development, learning difficulties and problems in social adjustment.
Technically used term in Britain and North America for describing people who score less than a 70 IQ is called mental retardation.