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Emergence of language and handedness at 18, and 24 months of age.

Research Project

Project/Area Number 09610157
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field 教育・社会系心理学
Research InstitutionShimane Prefectural Shimane Women's Junior College

Principal Investigator

YAMASHITA Yukie  Shimane Prefectural Shimane Women's Junior College, Nursery Education, Associate Professor, 保育科, 助教授 (70201150)

Project Period (FY) 1997 – 1999
Project Status Completed (Fiscal Year 1999)
Budget Amount *help
¥2,300,000 (Direct Cost: ¥2,300,000)
Fiscal Year 1999: ¥400,000 (Direct Cost: ¥400,000)
Fiscal Year 1998: ¥700,000 (Direct Cost: ¥700,000)
Fiscal Year 1997: ¥1,200,000 (Direct Cost: ¥1,200,000)
Keywordslanguage development / laterality / handedness / source of variance in development / 初期言語発達 / 性別 / スクリーニング / 発達スクリーニング / 生後18カ月児 / 個体差
Research Abstract

The present study designed a test to measure LQ (lateral quotient) below 3 years of age, with a parent's report and by observation, and ascertained whether there are signs of link between emergence of handedness and beginnings of language.
There was a strong significant correlation between the two kinds of calculated LQ values ; I.e., LQ by interview and LQ by observation (from r=0.74 to r=0.83, by age). These high correlations validate the measurement of handedness below 3 years of age. A parent's simple report on general hand preference was consistent with LQ by both measures when individuals were divided into two groups (right- and non-right-handed) with a cut-off LQ value of 60.
The present study ascertained a possible relationship between handedness and language development. At 18 months, LQ by observation were significantly correlated with rank score of developmental stage of language (r=0.34), vocabulary size (r=0.33), and number of comprehended body parts (r=0.32). At 24 months, LQ by interview at 18 months were significantly correlated with number of acquired particle at 24 months (r=0.41). After 30 months of age, there was no evidence of correlation between handedness and language. The results of LQ at 18 months showed individual differences in language development at 18 months, and its predictive value for grammar development at 24 months.
These results were considered from the view point of emergence of handedness and its association with cerebral speech lateralization.

Report

(4 results)
  • 1999 Annual Research Report   Final Research Report Summary
  • 1998 Annual Research Report
  • 1997 Annual Research Report
  • Research Products

    (4 results)

All Other

All Publications (4 results)

  • [Publications] Yukie YAMASHITA: "Measuring Handedness with a Parent's Report and by Observation in Early Childhood"島根女子短期大学紀要. 37. 59-70 (1999)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] YAMASHITA Yukie: "Measuring Handedness with a Parent's Report and by Observation in Early Childhood"Bulletin of Shimane Women's Junior College. Vol.37. 59-70 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] Yukie YAMASHITA: "Measuring Handedness with a Parent's Report and by Observation in Early Childhood"島根女子短期大学紀要. 37. 59-70 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] Yukie YAMASHITA: "Measuring Handedness with a Parent's Report and Observation in Early Childhod" 島根女子短期大学紀要. 37号. 59-70 (1999)

    • Related Report
      1998 Annual Research Report

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Published: 1997-04-01   Modified: 2016-04-21  

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