Effect of identification and intervention age on language development for mandarin-speaking deaf children with high family involvement

ObjectiveThe purpose of this study is to assess the language ability between early-intervention and later-intervention Mandarin-speaking deaf children, who have normal cognition and high family involvement.Materials and methodsThere are 29 subjects enrolled. 11 born deaf children received early intervention (7 HA and 4 CI) before 6 months old as study group. Another 18 born deaf children received later intervention (11 HA and 7 CI) between 7 and 35 months old as reference group. They were all regarded as with normal cognition and high family involvement. Their mean assessment age was 50 months old in early group and 51 months old in later group. We used several tools to test their perceptive vocabulary size, to evaluate perceptive language syntax and to compare perceptive and expressive language scores.ResultsOur study revealed there are significant difference between these two groups in the ability of vocabulary size, perceptive language syntax and perceptive language scores. The results showed there is no significant difference between these two groups in their expressive language scores, although their achievement score is higher in the early group.ConclusionsIt clearly showed the ability of perceptive language in early-intervention deaf children was better than that of later-intervention. The ability of their expressive language showed no difference between them.