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Related Experiment Video

Updated: Jun 3, 2026

Evaluation of Hemisphere Lateralization with Bilateral Local Field Potential Recording in Secondary Motor Cortex of Mice

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Published on: July 31, 2019

Socioeconomic status, a forgotten variable in lateralization development.

David B Boles¹

¹Department of Psychology, P.O. Box 870348, University of Alabama, Tuscaloosa, AL 35405, United States. dboles@bama.ua.edu

Brain and Cognition

|April 5, 2011

Summary

This summary is machine-generated.

Socioeconomic status (SES) impacts brain development. Reanalyzed data show lower SES groups exhibit reduced brain lateralization, suggesting potential maturation delays or reduced functional specialization.

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Area of Science:

Neuroscience
Developmental Psychology
Sociology

Background:

Socioeconomic status (SES) is linked to various social health outcomes.
Previous studies (1970s-1980s) found no clear link between SES and hemispheric asymmetry.
Prior research lacked asymmetry measures that corrected for accuracy ceiling and floor effects.

Purpose of the Study:

To reanalyze existing data on SES and hemispheric asymmetry.
To investigate if corrected asymmetry measures reveal a relationship between SES and lateralization.
To explore developmental implications of observed differences.

Main Methods:

Reanalysis of published data from dichotic listening, tactile dot enumeration, and visual recognition tasks.
Application of a laterality coefficient that corrects for ceiling and floor effects in accuracy.
Comparison of hemispheric asymmetry between lower and higher socioeconomic status (SES) groups.

Main Results:

Consistent findings across studies reveal reduced lateralization in lower SES groups.
The corrected laterality coefficient identified a significant difference not apparent in original analyses.
Results suggest potential developmental differences in brain organization related to SES.

Conclusions:

Reduced brain lateralization in lower SES groups may indicate delayed maturation or reduced functional specialization.
Corrected asymmetry measures are crucial for accurate comparisons across different performance levels.
Behavioral asymmetry measures can inform future structural and functional brain imaging research.