Published online by Cambridge University Press: 08 February 2018
The intelligence, as measured by standard tests, ceases growing after about 14 or 16 years of age, and slowly decreases from about 25 or 30 years of age (Wechsler, 1945). The sex glands are developing as the intelligence ceases to develop.
In view of these observations, consideration was given to the possibility that the defective developed mentally to a degree below the normal because too great a quantity of the appropriate sex hormones was circulating in the blood stream. In consequence, the opposite hormone was administered, stilboestral being given to males and pernandren to females.
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