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Wong, Simpson W. L.; Cheung, Him; Zheng, Mo; Yang, Xiujie; McBride, Catherine; Ho, Connie Suk-Han; Leung, Judy Sze-Man; Chow, Bonnie Wing-Yin; Waye, Mary Miu Yee – Child Development, 2020
Vocabulary knowledge was tested in a native (Cantonese-Chinese) and foreign (English) language in 150 twins and 150 singletons aged 6-11 years, matched on age, gender, grade level, nonverbal intelligence, parents' education, family income, and number of siblings and household members. The singletons clearly outperformed the twins on the native…
Descriptors: Vocabulary Development, Native Language, Sino Tibetan Languages, Chinese
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Knight, George P. – Child Development, 1982
Assesses the potential for birth order by age, sex, and income-interaction effects in the area of cooperative/competitive social orientation in a sample of 105 children. Results revealed birth order by sex and birth order by income-interaction effects. Implications are discussed. (Author/RH)
Descriptors: Age, Birth Order, Children, Competition