Heyrani Raheleh, Nejati Vahid, Abbasi Sara, Hartwigsen Gesa
Department of Education and Psychology, Alzahra University, Tehran, Iran.
Raftar Cognitive Neuroscience Research Center, Shahid Beheshti University, Tehran, Iran.
Front Psychol. 2022 Feb 3;12:736359. doi: 10.3389/fpsyg.2021.736359. eCollection 2021.
Language is a cognitive function that is asymmetrically distributed across both hemispheres, with left dominance for most linguistic operations. One key question of interest in cognitive neuroscience studies is related to the contribution of both hemispheres in bilingualism. Previous work shows a difference of both hemispheres for auditory processing of emotional and non-emotional words in bilinguals and monolinguals. In this study, we examined the differences between both hemispheres in the processing of emotional and non-emotional words of mother tongue language and foreign language. Sixty university students with Persian mother tongue and English as their second language were included. Differences between hemispheres were compared using the dichotic listening test. We tested the effect of hemisphere, language and emotion and their interaction. The right ear (associated with the left hemisphere) showed an advantage for the processing of all words in the first language, and positive words in the second language. Overall, our findings support previous studies reporting left-hemispheric dominance in late bilinguals for processing auditory stimuli.
语言是一种认知功能，在两个半球不对称分布，大多数语言操作以左侧半球为主导。认知神经科学研究中一个关键的兴趣问题与两个半球在双语现象中的作用有关。先前的研究表明，双语者和单语者在对情感和非情感词汇的听觉处理上，两个半球存在差异。在本研究中，我们考察了两个半球在处理母语和外语的情感及非情感词汇时的差异。纳入了60名以波斯语为母语、英语为第二语言的大学生。使用双耳分听测试比较半球之间的差异。我们测试了半球、语言和情感及其相互作用的影响。右耳（与左半球相关）在处理第一语言的所有词汇以及第二语言的积极词汇方面表现出优势。总体而言，我们的研究结果支持了先前的研究，即晚期双语者在处理听觉刺激时左半球占主导地位。
