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Decomposing the Variance in Reading Comprehension to Reveal the Unique and Common Effects of Language and Decoding
Published on: October 11, 2018
Decoding the neuroanatomical basis of reading ability: a multivoxel morphometric study.
Qinghua He1, Gui Xue, Chunhui Chen
1National Key Laboratory of Cognitive Neuroscience and Learning, Beijing Normal University, Beijing 100875, China.
Reading involves distinct brain regions for different skills. Phonological decoding links to the left parietal lobe, form-sound association to the hippocampus/cerebellum, and naming speed to widespread areas. These findings clarify reading
Area of Science:
- Neuroscience
- Cognitive Psychology
- Neuroimaging
Background:
- Reading is a complex skill with significant individual differences.
- Neuroanatomical correlates of reading components are not fully understood.
- Reading involves multiple distinct cognitive processes.
Purpose of the Study:
- To identify distinct components of reading ability.
- To investigate the neuroanatomical basis (gray matter volume) of these reading components.
- To explore the relationship between reading components and general cognitive abilities.
Main Methods:
- Utilized a large sample of 416 college students performing 7 reading tasks.
- Employed multivariate support vector regression with tenfold cross-validation.
- Analyzed gray matter volume (GMV) in relation to identified reading components.
Main Results:
- Identified three uncorrelated reading components: phonological decoding, form-sound association, and naming speed.
- Phonological decoding associated with left superior parietal lobe/supramarginal gyrus GMV.
- Form-sound association predicted by hippocampus/cerebellum GMV; naming speed linked to widespread cortical regions.
- Naming speed correlated with intelligence and processing speed.
Conclusions:
- Distinct neural regions underpin different components of reading ability.
- Gray matter volume variations contribute to individual differences in reading.
- Naming speed shares neural substrates with general cognitive abilities, unlike other reading components.
