The influence of the bimodal stimulation on the auditory ability of temporal ordering

ABSTRACT Objective: to analyze temporal ordering auditory ability in unilateral cochlear implant users with bimodal stimulation. Methods: the study included 15 unilateral cochlear implant users, six with bimodal stimulation and nine with exclusive cochlear implant and a control group consisting of 15 hearing individuals. Both groups underwent the standard duration and the standard frequency tests for temporal ordering auditory ability analysis. In the inferential analysis of the data, the nonparametric statistical tests Mann-Whitney and Kruskal-Wallis were used (p<0,05). Results: there was a significant difference in the performance of the standard frequency test, and subjects with bimodal stimulation presented a better performance than those with exclusive cochlear implants. The standard frequency test was associated with education and speech therapy. On the other hand, in the standard duration test, there was a relation with the implanted ear. The most frequent errors were discrimination for both temporal tests. Conclusion: bimodal stimulation, education and speech therapy influenced the performance of the frequency pattern test, while the implanted side influenced the performance of the duration pattern test.摘要 研究目的：分析接受双模式刺激（bimodal stimulation）的单侧人工耳蜗（cochlear implant）使用者的听觉时间排序能力。 研究方法：本研究纳入15名单侧人工耳蜗使用者，其中6名接受双模式刺激，9名单用人工耳蜗；另设置由15名听力正常者组成的对照组。两组均接受标准时长测试与标准频率测试，以开展听觉时间排序能力分析。在数据推断性分析中，采用非参数统计检验曼-惠特尼U检验（Mann-Whitney）与克鲁斯卡尔-沃利斯检验（Kruskal-Wallis），检验水准设定为p<0.05。 研究结果：标准频率测试的组间表现存在显著差异，接受双模式刺激的受试者表现优于单用人工耳蜗的受试者。标准频率测试结果与受教育程度及言语治疗存在相关性。而标准时长测试结果则与植入耳侧相关。两项听觉时间测试中最常见的错误类型均为辨别错误。 研究结论：双模式刺激、受教育程度及言语治疗会影响频率模式测试的表现，而植入耳侧则会影响时长模式测试的表现。