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[2D:4D finger ratio and language development]
L Albores-Gallo1, A Fernández-Guasti, L Hernández-Guzmán
1Secretaría de Salud, Hospital Psiquiatrico Infantil Dr Juan N Navarro, Tlalpan, Mexico. lilialbores@yahoo.com.mx
Revista De Neurologia
|May 28, 2009
Summary
Prenatal testosterone may influence children's language skills. A lower second-to-fourth digit ratio (2D:4D), indicating higher prenatal testosterone, correlated with better vocabulary and fewer articulation issues in young boys.
Area of Science:
- Developmental psychology
- Pediatric endocrinology
- Linguistics
Context:
- Prenatal hormone exposure is increasingly recognized for its potential impact on child development.
- The 2D:4D finger ratio serves as a proxy for prenatal androgen and estrogen levels.
- This ratio is measurable in early childhood, offering a window into early developmental influences.
Purpose:
- To investigate the association between the 2D:4D finger ratio and language development, specifically vocabulary and articulation.
- To explore potential sex differences in this association.
Summary:
- The study measured the 2D:4D finger ratio in 97 preschoolers and assessed language development via parental surveys.
- A negative correlation was observed between the right 2D:4D ratio and vocabulary in younger children (≤4 years), significant in boys.
- Stronger negative correlations were found between the right 2D:4D ratio and articulation problems in younger children (≤3 years), particularly in boys.
Impact:
- Findings suggest a significant role for prenatal testosterone in language acquisition and articulation skills.
- This research highlights potential hormonal underpinnings of early language development trajectories.
- The 2D:4D ratio may serve as an early indicator for language development variations.
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