[323454]

How does this square with intelligence studies of deaf people? Despite being half as likely to complete tertiary education, the deaf exhibit the same IQ distribution as the general population. Are they doing something else that is just as effective as education at increasing IQ?

> In sum, the implication of the research of the last fifty years which compared the IQ of the deaf with the hearing and of subgroups of deaf children indicates that when there are no complicating multiple handicaps, the deaf and hard-of-hearing function at approximately the same IQ level on performance intelligence tests as do the hearing. [1]

[1] https://academic.oup.com/jdsde/article/10/3/225/413353