Abstract
The purpose of this study was reproducibility, and the sound source normal position of COR minimum response levels (MRLs) were considered based on movement and language development in 303 children with multiple disabilities and motor disorders. They were less than 6 years old (average: 2 years and 5 months), had less than motor development age (DA) at 12 months, and MRLs were less than 35dBHLs. Reproducibility exists in language development positive in the group of 10 months or more in 90% or more of cases, and the sound source normal position to one direction was accepted in 50% or more of cases.
The positive sound source normal position to right-and-left 2 direction was possible for 2% of all cases. For less than motor DA 7 months and less than language DA 4 months, the sound source normal position was difficult and influenced by condition such as awakening and epilepsy. In physiologically stable subjects, reflecting, inquiry, and emotion reactions were accepted as hearing behavior, especially the eye reaction. We surmised that the reaction to hearing behavior according to motor and language development became the index of evaluation. A setup of the stable seating position in which the head is easy to control is importnat during behavioral hearing testing.
