Effect of sample length on MLU in Mandarin-speaking hard-of-hearing children.

This study investigated the impact of language sample length on mean length of utterance (MLU) and aimed to determine the minimum number of utterances required for a reliable MLU. Conversations were collected from Mandarin-speaking, hard-of-hearing and typical-hearing children aged 16-81 months. The MLUs were calculated using sample sizes ranging from 25 to 200 utterances. The results showed that for an MLU between 1.0 and 2.5, 25 and 50 utterances were sufficient for reliable MLU calculations for hard-of-hearing and typical-hearing children, respectively. For an MLU between 2.5 and 3.75, 125 utterances were required for both groups. For an MLU greater than 3.75, 150 and 125 utterances were required for hard-of-hearing and typical-hearing children, respectively. These findings suggest that a greater number of utterances are required for a reliable MLU as language complexity increases. Professionals working with hard-of-hearing children should consider collecting different numbers of utterances based on the children's language complexity levels.

Reading Comprehension of Chinese-Speaking Children With Hearing Loss: The Roles of Metalinguistic Awareness and Vocabulary Knowledge.

PURPOSE: This study aims to explore the contributions of phonological awareness (PA) and morphological awareness (MA) to the reading comprehension skills of Chinese-speaking children with hearing loss (HL) and examine the possible mediation effect of vocabulary knowledge on the relationships of PA and MA with their reading comprehension. METHOD: The participants were 28 Chinese-speaking children with HL, who were followed from Grade 1 through Grade 2. They were administered a series of tests that measured their PA and MA at the beginning of Grade 1, vocabulary knowledge at the end of Grade 1, and reading comprehension at the end of Grade 2. RESULTS: MA significantly accounted for additional variance in reading comprehension beyond the effect of PA but not vice versa. Both PA and MA contributed uniquely to vocabulary knowledge, which completely mediated the relationships of PA and MA with reading comprehension. CONCLUSIONS: PA and MA are both essential to the development of vocabulary knowledge and reading comprehension in Chinese-speaking children with HL; however, MA seems to be more important than PA in their reading comprehension. PA and MA significantly affect children's reading comprehension through their influence on vocabulary knowledge. This study has replicated previous evidence on the importance of PA, MA, and vocabulary knowledge in the reading comprehension of children with typical hearing, and has extended its significance to children with HL. In addition, the findings have the potential to inform educational practitioners regarding the importance of teaching essential reading skills to Chinese-speaking children with HL.

Early Reading Development in Chinese-speaking Children with Hearing Loss.

This study aims to explore early reading comprehension in Chinese-speaking children with hearing loss (HL) by examining character recognition and linguistic comprehension. Twenty-five children with HL received three measures relevant to character reading: phonological awareness (PA), morphological awareness (MA), and character recognition; two linguistic-comprehension measures: receptive vocabulary knowledge and listening comprehension; and one reading comprehension measure. Three demographic variables pertinent to children with HL were also taken into account. The results showed that the degree of HL was significantly related to reading comprehension, receptive vocabulary knowledge, and listening comprehension, the latter two of which were further correlated with the type of hearing device; however, the hearing age was associated with neither of the measures. MA made a unique contribution to character reading in the presence of PA, but the reverse was not true. Linguistic comprehension significantly accounted for additional variance in reading comprehension over and above character recognition but not vice versa. A further analysis controlling for character recognition revealed that receptive vocabulary knowledge was more contributive to early reading comprehension than was listening comprehension. The results of the current investigation have potential to inform educational practice in teaching and/or intervening Chinese children with HL regarding their reading skills.