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Using Cholesky Decomposition to Explore Individual Differences in Longitudinal Relations between Reading Skills
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Individual differences in decoding skill, print exposure, and cortical structure in young adults.

Clinton L Johns1, Andrew A Jahn1, Hannah R Jones2

  • 1Haskins Laboratories, 300 George St., Suite 900, New Haven, CT, 06511, U.S.A.

Language, Cognition and Neuroscience
|December 4, 2018
PubMed
Summary

This study found that brain structure differences relate to reading skills in young adults. Specific grey matter regions in the brain correlate with decoding ability and print exposure.

Keywords:
grey matter structureindividual differencesneuroimagingphonological decodingprint exposurereading skillssupramarginal gyrus

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Area of Science:

  • Neuroscience
  • Cognitive Psychology
  • Neuroimaging

Background:

  • Individual differences in cognitive abilities, such as reading proficiency, are linked to variations in brain structure.
  • Understanding the neuroanatomical basis of reading is crucial for developing targeted interventions.

Purpose of the Study:

  • To investigate the relationship between individual differences in cortical grey matter structure and cognitive profiles in young adult readers.
  • To identify specific brain regions associated with word/nonword reading ability (decoding) and print exposure.

Main Methods:

  • Whole-brain analyses were conducted to examine correlations between grey matter volume (GMV) and grey matter thickness (GMT) and reading-related cognitive measures.
  • Participants' cognitive profiles, including decoding skills and print exposure, were assessed.
  • Neuroimaging data were analyzed to reveal structural differences in cortical grey matter.

Main Results:

  • Decoding ability showed positive correlations with GMV in the left superior temporal sulcus and GMT in the right superior temporal gyrus.
  • Print exposure was negatively correlated with GMT in the left inferior frontal gyrus and left fusiform gyrus (including the visual word form area).
  • Both decoding and print exposure correlated with distinct subregions of the supramarginal gyrus (SMG), with decoding linked to anterior SMG GMV and print exposure to posterior SMG GMT.

Conclusions:

  • The study refines our understanding of the neuroanatomical underpinnings of reading proficiency.
  • It highlights novel relationships between the structure of specific brain regions, like the posterior supramarginal gyrus, and reading skills.
  • This research integrates previous findings on cortical structure and reading ability.