Six tests of intellectual performance were administered to 25 deaf and 21 hearing adult signers. The two groups were not significantly different on tests of Lip Reading and Reception of Signed English but the hearing subjects were superior on tests of non-verbal reasoning and perceptual speed. The hearing were greatly superior on a test of verbal reasoning.
BoltonB.A factor analytic study of communication skills and non-verbal abilities of deaf rehabilitation clients. Multivariate Behavioural Research, 1971, 6, 485–501.
3.
ConradR.Lipreading by deaf and hearing children. British Journal of Educational Psychology, 1977, 47, 60–65.
4.
DavisH., & SilvermanS. R.Hearing and deafness. New York: Holt, Rinehart & Winston, 1964.
5.
FurthH. G.Thinking without language. New York: Free Press of Glencoe, 1966.
6.
JohnsonD. D.Communication characteristics of a young deaf adult population: techniques for evaluating their skills. American Annals of the Deaf, 1976, 121, 409–424.
7.
MontgomeryG. W.A factorial study of communication and ability in deaf school leavers. British Journal of Educational Psychology, 1968, 38, 27–37.
