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Lower-level acoustics underlie higher-level phonological categories in lexical tone perception
1Department of Chinese and Bilingual Studies, The Hong Kong Polytechnic University, Hong Kong Special Administrative Region chenfeianthony@gmail.com, gpengjack@gmail.com.
The Journal of the Acoustical Society of America
|November 15, 2018
Summary
Congenital amusia, a pitch processing deficit, also impairs lexical tone perception. This study shows acoustic processing deficits extend to higher-level phonological processing in amusics.
Area of Science:
- Neuroscience
- Psychology
- Linguistics
Background:
- Congenital amusia is characterized by pitch-processing deficits.
- These deficits are transferable to lexical tone processing.
- It is unclear if amusia's tone difficulties stem from acoustic or phonological processing impairments.
Purpose of the Study:
- To investigate whether tone perception difficulties in congenital amusia are due to domain-general acoustic processing deficits or impaired higher-level phonological operations.
- To elucidate the influence of lower-level acoustic processing on higher-level phonological processing.
Main Methods:
- Utilized a modified categorical perception paradigm.
- Assessed acoustic and phonological processing in individuals with congenital amusia.
Main Results:
- The acoustic processing deficit in congenital amusia systematically extends to higher-level phonological processing.
- Evidence suggests a link between acoustic perception and phonological categorization in lexical tone processing.
Conclusions:
- Lower-level acoustic processing is fundamental to higher-level phonological categories in lexical tone perception.
- Findings highlight the pervasive impact of acoustic deficits in congenital amusia on complex auditory processing.
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