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- W4231426822 abstract "Abstract Brain correlates of reading ability have been intensely investigated. Most studies have focused on single-word reading and phonological processing, but the brain basis of reading fluency remains poorly explored to date. Here, in a voxel-based morphometry study with 8-year-old children, we compared fluent readers ( n = 18; 7 boys) with dysfluent readers with normal IQ ( n = 18; 6 boys) and with low IQ ( n = 18; 10 boys). Relative to dysfluent readers, fluent readers had larger gray matter volume in the right superior temporal gyrus and the two subgroups of dysfluent readers did not differ from each other, as shown in frequentist and Bayesian analyses. Pairwise comparisons showed that dysfluent readers of normal and low IQ did not differ in core reading regions and that both subgroups had less gray matter volume than fluent readers in occipito-temporal, parieto-temporal and fusiform areas. We also examined gray matter volume in matched subgroups of dysfluent readers differing only in socioeconomic status (SES): lower-SES ( n = 14; 7 boys) vs. higher-SES ( n = 14; 7 boys). Higher-SES dysfluent readers had larger gray matter volume in the right angular gyrus than their lower-SES peers, and the volume of this cluster correlated positively with lexico-semantic fluency. Age, sex, IQ, and gray matter volume of the right angular cluster explained 68% of the variance in the reading fluency of higher-SES dysfluent readers. In sum, this study shows that gray matter correlates of dysfluent reading are independent of IQ and suggests that SES modulates areas sub-serving lexico-semantic processes in dysfluent readers — two findings that may be useful to inform language/reading remediation programs." @default.
- W4231426822 created "2022-05-12" @default.
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- W4231426822 date "2021-04-01" @default.
- W4231426822 modified "2023-10-14" @default.
- W4231426822 title "Gray-Matter Correlates of Reading Fluency Deficits: SES Matters, IQ Does Not" @default.
- W4231426822 doi "https://doi.org/10.21203/rs.3.rs-368426/v1" @default.
- W4231426822 hasPublicationYear "2021" @default.
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