Benchmarks for the Dichotic Sentence Identification test in Brazilian Portuguese for ear and age

ABSTRACT INTRODUCTION: Dichotic listening tests should be used in local languages and adapted for the population. OBJECTIVE: Standardize the Brazilian Portuguese version of the Dichotic Sentence Identification test in normal listeners, comparing the performance for age and ear. METHODS: This prospective study included 200 normal listeners divided into four groups according to age: 13-19 years (GI), 20-29 years (GII), 30-39 years (GIII), and 40-49 years (GIV). The Dichotic Sentence Identification was applied in four stages: training, binaural integration and directed sound from right and left. RESULTS: Better results for the right ear were observed in the stages of binaural integration in all assessed groups. There was a negative correlation between age and percentage of correct responses in both ears for free report and training. The worst performance in all stages of the test was observed for the age group 40-49 years old. CONCLUSIONS: Reference values for the Brazilian Portuguese version of the Dichotic Sentence Identification test in normal listeners aged 13-49 years were established according to age, ear, and test stage; they should be used as benchmarks when evaluating individuals with these characteristics.引言：双耳分听测试（Dichotic Listening Test）应采用本地化语言，并针对目标人群进行适配调整。 研究目的：针对正常听力人群，标准化巴西葡萄牙语版双耳句子识别测试（Dichotic Sentence Identification Test），并对比不同年龄组与受试耳的测试表现差异。 研究方法：本前瞻性研究共纳入200名正常听力受试者，按年龄分为4组：13~19岁组（GI）、20~29岁组（GII）、30~39岁组（GIII）以及40~49岁组（GIV）。双耳句子识别测试分为四个阶段：训练阶段、双耳整合阶段、右侧定向声刺激阶段与左侧定向声刺激阶段。 研究结果：所有评估组别在双耳整合阶段均表现出右耳优势。在自由报告与训练阶段中，双耳的正确应答率均与年龄呈负相关。40~49岁年龄组在所有测试阶段的表现均为最差。 研究结论：本研究建立了13~49岁正常听力人群使用巴西葡萄牙语版双耳句子识别测试的分层参考值，分层依据包括年龄、受试耳及测试阶段；该参考值可作为评估此类特征人群听力表现的基准参照。