KMID : 1036820180230020327
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Communication Sciences & Disorders 2018 Volume.23 No. 2 p.327 ~ p.336
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Determining the Relationship of Children¡¯s Socioeconomic Background with Vocabulary Development: A Longitudinal Study of Korean Children at 3 and 7 Years of Age
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Kim Jee-Sun
Kim Soo-Jin Do Nam-Hee
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Abstract
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Objectives: The current study examined whether early receptive and expressive vocabulary development is related with children¡¯s socioeconomic background by analyzing longitudinal data of Korean children at 3 and 7 years of age.
Methods: In general, both vocabulary scores were about 2.5 times higher at 7 years than at 3 years. Socioeconomic background was significantly associated with expressive vocabulary development at age 3, and with the amount of change in the receptive scores between the ages of 3 and 7. While this relationship was maintained in the expressive scores of the 7-year-old, for lower income families the first child tended to develop relatively slowly while the third child developed the quickest. In addition, the results showed that girls¡¯ scores tended to be higher than boys¡¯ scores at 3-year-old, and the difference was maintained in all other scores.
Results: There were effects of household income and birth order which interacted. The birth order effect pattern was very similar to the effect of household income.
Conclusion: The results are discussed in comparison with previous Korean findings and with international ones.
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KEYWORD
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Vocabulary development, Longitudinal study, Korean children, SES, Gender, Birth order
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