Dsouza Sweedal Chrystal, Jyotsna C S, Rohith K, Yashu M A, Bhat Mayur
Department of Audiology and Speech-Language Pathology, Kasturba Medical College Mangalore, Manipal Academy of Higher Education, Manipal, India.
Department of Speech and Hearing, SDM College of Medical Sciences and Hospital, Shri Dharmasthala Manjunatheshwara University (SDMU), Dharwad, India.
Audiol Neurootol. 2025;30(2):127-133. doi: 10.1159/000541598. Epub 2024 Sep 27.
Dichotic listening (DL) is a test where auditory stimuli are presented simultaneously to each ear. DL has clinical applications in assessing APD, schizophrenia, and brain injury. It is sensitive to hemisphere differences and has been used to study language lateralization. The study aimed to develop, validate, and establish norms for a Quadri condition Dichotic Double Word Test (free recall, forced right, forced left, and switch attention) in the Kannada language (DDWT-K).
This study was carried out in two phases. Phase 1 aimed to develop and validate the DDWT-K and phase 2 involved data collection. The developed novel dichotic test was administered on 100 normal-hearing adults in four conditions - free recall, forced right, forced left, and switch attention.
The results showed significant ear differences in free recall condition indicating right ear advantage. The switch attention condition showed slightly poorer performance when compared to both the forced attention condition indicating greater task difficulty. The test-retest reliability was above 0.7 for all the conditions indicating good reliability.
The findings demonstrated the best preservation of the original dichotic effects and hence ready for clinical use.
双耳分听（DL）是一种向每只耳朵同时呈现听觉刺激的测试。DL在评估听觉处理障碍（APD）、精神分裂症和脑损伤方面具有临床应用价值。它对半球差异敏感，并已被用于研究语言侧化。本研究旨在开发、验证并建立卡纳达语四条件双耳双词测试（自由回忆、强制右、强制左和切换注意力）（DDWT-K）的常模。
本研究分两个阶段进行。第一阶段旨在开发和验证DDWT-K，第二阶段涉及数据收集。对100名听力正常的成年人在自由回忆、强制右、强制左和切换注意力这四种条件下进行了新开发的双耳测试。
结果显示，在自由回忆条件下存在显著的耳间差异，表明右耳优势。与两种强制注意力条件相比，切换注意力条件下的表现略差，表明任务难度更大。所有条件下的重测信度均高于0.7，表明信度良好。
研究结果表明，原始双耳效应得到了最佳保留，因此可用于临床。
