This study was aimed to provide translated questionnaires in Korean including Satisfaction with Amplification in Daily Life (SADL), Client Oriented Scale of Improvement (COSI), and International Outcome Inventory for Hearing Aids (IOI-HA) and analyze their reliabilities and validities for measuring and improving hearing-aid satisfaction level in Korea. Methods: Fifty people who were fitted with their new hearing-aids participated (70.4 ± 12.4). All the participants answered Korean-IOI-HA and newly translated SADL and COSI in Korean to measure hearing aid satisfaction, when they visited the hearing-aid centers where they were fitted hearing-aids initially. The hearing-aid types were Completely In the Canal for 29, In The Canal for 10, and Receiver In the Canal for 11. Monaural and binaural users were 20 and 30, respectively. Out of fifty, fifteen performed test-retest measurements. Results: Translated SADL, COSI, and IOI-HA's means and Cronbach's alpha values were 4.76 and 0.83, 3.60 and 0.83, and 3.73 and 0.70. There was a significant correlation coefficient among three questionnaires. No significant difference according to hearing-aid types was found. A significant difference for the wearing manners between bilateral and unilateral hearing aids was found. The correlations between test and retest were 0.83 for SADL, 0.71 for COSI, and 0.74 for IOI-HI indicating good reliabilities. Conclusion: The translated versions of SADL, COSI and IOI-HA were validated as useful tools for measuring satisfaction of hearing-aids and the fitting in Korea. Using these questionnaires, better satisfaction level of hearing-aids in Korea could be provided in the future.
The evaluation of speech and language is crucial for children with normal hearing (NH) and hearing loss (HL). The aim of this study was to investigate the early communicative skills of children with NH and HL and to compare the performance depending on chronological age (CA) and hearing age (HA). Methods: Four tools, Korean MacArthur-Bates Communicative Development Inventories (K M-B CDI), Sequenced Language Scale for Infants (SELSI), Communication and Symbolic Behavior Scales Developmental Profile (CSBS DP) checklist and behavior sample were used. The data was collected from 50 children, 26 NH and 24 HL from 4 to 56 months of age. The average age of NH and HL groups was between 17-and 19-months-old, respectively. The HA of the HL group was 13-months-old. They were tested every two to three months. The developmental progress was analyzed by CA and HA. Results: With K M-B CDI, when CA and HA were compared for the HL group, the production of expressive language did not show any difference, but the receptive language and action-gesture scores were significantly better in HA at 7-9 months and 19-24 months. With SELSI, both receptive and expressive languages showed significantly better scores in HA (F(1,73) = 0.580, p < .05, F(1,73) = 11.036, p < .05). With CSBS DP, the HA showed significantly better social scores for checklist (F(1,63) = 6.248, p < .05). Conclusion: As the HA of the HL group showed superior performance compared to the corresponding age of the NH group even in the early stage, the effectiveness of HA following fitting of amplification device and the appropriate intervention has been implicated.
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