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In this paper, some developmental characteristics of a population of hearing-impaired children are described. The 79 children described are all those born in Greater Manchester in the years 1977-1980 with a mean bilateral sensorineural hearing loss of 25 dB HL or more in the better ear and without additional handicaps or bilingualism in the home. The subjects attended clinics in which comprehensive monitoring of their development was carried out by means of audiological, psychological and linguistic testing and video-recordings of mother-child interaction. In this cross-sectional study of their first clinic attendance at the ages of between 3 and 7, the measures used to define their levels of language ability and intelligence are described. As a means of dealing with the wide range of values, the children were blocked into groups according to their spontaneous language level and the results are reported groupwise.
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Gallaway et al. (1990) studied this question.
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