Abstract
The extent to which therapeutic intervention of hearing loss may yield better communication and social interaction was investigated in a pilot study during seven months after treatment in twelve hearing impaired subjects with Down syndrome with a mean age of 50.6 years. Although according to spontaneous observations of staff subtle positive reactions to treatment occurred in five subjects, no significant improvement could be measured by means of objective methods. The influence of personal factors like degree of retardation and language development, severity and duration of hearing impairment, age, period of habituation and training, and environmental factors, is to be studied further.