Repeated impedance measures were given over five weeks to 11 autistic, 20 learning-disabled, and 20 normal children. A repeated measures analysis of variance led to the conclusion that fluctuating, negative middle ear pressure greater than normal characterizes both autistic and learning-disabled children with the more abnormal pressures typical in…

This study examined the use of air-puff conditioning audiometry in the hearing assessment of 12 multiply handicapped (including severe/profound mental retardation) subjects, ages 9-32. Ten subjects reached criterion conditioning and then completed the hearing assessment with the air-puff procedure while one reached criterion with a modified…

The hearing ability and related cognitive ability of 26 adolescents and young adults with Down's Syndrome (DS) and 26 matched subjects with trainable mental retardation (MR) were compared. Results revealed greater hearing losses in DS than in other MR individuals, especially in the high-frequency range. DS subjects with poorer hearing needed more…