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Voice gender categorization in the connected and disconnected hemispheres.
Social Neuroscience ( IF 2 ) Pub Date : 2020-03-04 , DOI: 10.1080/17470919.2020.1734654
Giulia Prete 1 , Mara Fabri 2 , Nicoletta Foschi 3 , Luca Tommasi 1
Affiliation  

The role of the left and right hemispheres in processing the gender of voices is controversial, some evidence suggesting a bilateral involvement, some others suggesting a right-hemispheric superiority. We investigated this issue in a gender categorization task involving healthy participants and a male split-brain patient: female or male natural voices were presented in one ear during the simultaneous presentation of white noise in the other ear (dichotic listening paradigm). Results revealed faster responses by the healthy participants for stimuli presented in the left than in the right ear, although no asymmetries emerged between the two ears in the accuracy of both the patient and the control group. Healthy participants were also more accurate at categorizing female than male voices, and an opposite-gender bias emerged – at least in females – showing faster responses in categorizing voices of the opposite gender. The results support a bilateral hemispheric involvement in voice gender categorization, without asymmetries in the patient, but with a faster categorization when voices are directly presented to the right hemisphere in the healthy sample. Moreover, when the two hemispheres directly interact with one another, a faster categorization of voices of the opposite gender emerges, and it can be an evolutionary grounded bias.



中文翻译:

连接和断开的半球中的语音性别分类。

左右半球在处理声音性别方面的作用是有争议的,一些证据表明双边参与,另一些证据表明右半球优势。我们在一项涉及健康参与者和男性裂脑患者的性别分类任务中研究了这个问题:在另一只耳朵同时呈现白噪声的同时,女性或男性的自然声音出现在另一只耳朵中(双耳听音范式)。结果显示,健康参与者对左耳刺激的反应比右耳更快,尽管在患者和对照组的准确性方面,两只耳朵之间没有出现不对称。健康的参与者在分类女性声音方面也比男性声音更准确,并且出现了异性偏见——至少在女性中——在对异性声音进行分类时表现出更快的反应。结果支持双侧半球参与声音性别分类,患者没有不对称,但当声音直接呈现到健康样本的右半球时,分类速度更快。此外,当两个半球直接相互作用时,异性声音的分类会更快出现,这可能是一种基于进化的偏见。

更新日期:2020-03-04
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