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Structural neural correlates of individual differences in categorical perception
Brain and Language ( IF 2.5 ) Pub Date : 2021-01-29 , DOI: 10.1016/j.bandl.2021.104919
Pamela Fuhrmeister 1 , Emily B Myers 1
Affiliation  

Listeners perceive speech sounds categorically. While group-level differences in categorical perception have been observed in children or individuals with reading disorders, recent findings suggest that typical adults vary in how categorically they perceive sounds. The current study investigated neural sources of individual variability in categorical perception of speech. Fifty-seven participants rated phonetic tokens on a visual analogue scale; categoricity and response consistency were measured and related to measures of brain structure from MRI. Increased surface area of the right middle frontal gyrus predicted more categorical perception of a fricative continuum. This finding supports the idea that frontal regions are sensitive to phonetic category-level information and extends it to make behavioral predictions at the individual level. Additionally, more gyrification in bilateral transverse temporal gyri predicted less consistent responses on the task, perhaps reflecting subtle variation in language ability across the population.



中文翻译:

分类感知个体差异的结构性神经相关性

听者可以明确地感知语音。虽然在儿童或有阅读障碍的个体中观察到了群体级别的分类感知差异,但最近的研究结果表明,典型的成年人在分类感知方面存在差异。目前的研究调查了语音分类感知中个体差异的神经来源。57 名参与者在视觉模拟量表上对语音标记进行了评分;测量了类别性和反应一致性,并与来自 MRI 的大脑结构测量值相关。右侧额中回的表面积增加预测了对摩擦连续体的更多分类感知。这一发现支持了额叶区域对语音类别级别信息敏感的观点,并将其扩展到在个人级别进行行为预测。

更新日期:2021-01-29
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