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Related Concept Videos

Lateralization01:28

Lateralization

Brain lateralization refers to the division of mental processes and functions between the two hemispheres of the brain, a phenomenon that optimizes neural efficiency and underpins complex abilities in humans. This specialization allows each hemisphere to perform tasks where it has a comparative advantage, facilitating more refined cognitive capabilities across different domains.
Language and Cognition01:27

Language and Cognition

Language serves as a bridge between ideas and communication, influencing how individuals perceive and interact with the world. Psychologists have long debated whether language shapes thought or vice versa. This discussion gained grip with Edward Sapir and Benjamin Lee Whorf in the 1940s, who proposed that language determines thought, a concept known as linguistic determinism. They suggested that the vocabulary and structure of a language influence how its speakers think and perceive reality.
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Higher Mental Functions of the Brain: Language

Language is a system of communication that allows the expression of thoughts, ideas, and feelings. The brain processes language in both hemispheres.
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Cerebral Hemispheres01:05

Cerebral Hemispheres

The human brain, a complex organ, is functionally divided into two cerebral hemispheres—left and right. These hemispheres are interconnected by a structure of paramount importance, the corpus callosum. This substantial bundle of neural fibers is not just a bridge between the hemispheres but a crucial element for the brain's comprehensive functioning. It enables efficient communication between the two hemispheres, allowing each side of the brain to control and receive sensory and motor...
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Updated: May 24, 2026

Using Cholesky Decomposition to Explore Individual Differences in Longitudinal Relations between Reading Skills
06:52

Using Cholesky Decomposition to Explore Individual Differences in Longitudinal Relations between Reading Skills

Published on: September 17, 2019

Individual differences in reading skill and language lateralisation: a cluster analysis.

Christine Chiarello1, Suzanne E Welcome, Christiana M Leonard

  • 1Department of Psychology, University of California, Riverside, Riverside, CA 92521, USA. christine.chiarello@ucr.edu

Laterality
|March 6, 2012
PubMed
Summary
This summary is machine-generated.

Individual differences in reading skill and brain lateralization were explored using cluster analysis in college students. Four distinct reading profiles emerged, revealing novel patterns of visual field asymmetry not explained by sex or handedness.

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06:52

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Measuring Statistical Learning Across Modalities and Domains in School-Aged Children Via an Online Platform and Neuroimaging Techniques
08:05

Measuring Statistical Learning Across Modalities and Domains in School-Aged Children Via an Online Platform and Neuroimaging Techniques

Published on: June 30, 2020

Area of Science:

  • Neuroscience
  • Cognitive Psychology
  • Developmental Psychology

Background:

  • Previous research indicated limited influence of sex and handedness on reading and brain lateralization correlations.
  • Understanding individual differences in reading and cerebral lateralization requires exploring factors beyond traditional demographic variables.

Purpose of the Study:

  • To investigate individual differences in reading skill and cerebral lateralization using a data-driven approach (cluster analysis).
  • To identify distinct subgroups of readers based on reading ability and visual field (VF) asymmetry.
  • To explore potential neuroanatomical correlates of these subgroups, including the planum temporale and corpus callosum.

Main Methods:

  • Cluster analysis was applied to reading assessments and divided visual field word recognition data from 200 college students.
  • Structural MRI scans were used to examine brain structures, including the planum temporale and corpus callosum.
  • Behavioral classification was performed without a priori assumptions about relevant subgroups.

Main Results:

  • Four distinct subgroups of college-age readers were identified, differing in reading skill and VF lateralization profiles.
  • Poorer reading skill correlated with reduced VF asymmetry; average readers showed exaggerated right visual field/left hemisphere advantages.
  • Skilled readers exhibited varied asymmetry patterns, and clusters did not differ by sex or handedness.
  • Posterior corpus callosum size differentiated high-skill reading subgroups, and outliers lacked typical leftward planum temporale asymmetry.

Conclusions:

  • Individual differences in reading and cerebral lateralization are complex and not fully explained by sex or handedness.
  • A data-driven approach reveals distinct reading profiles with unique patterns of brain asymmetry.
  • Variations in neurodevelopment, potentially influenced by genetic and environmental factors, may underlie atypical profiles.