Intellegence among persons with Turner's syndrome.

Wechsler intelligence scale IQ distributions from a representative sample of 67 persons with Turner's syndrome are compared with distributions from a control sample of subjects individually matched for age, race, education, and other social characteristics. Among the probands, there is no increased incidence of either severe or moderate retardation, intelligence is similar regardless of karyotype or somatic stigmata, and the characteristic cognitive deficit is similar among both children and young adults.