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Direct linkWong, 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
Johnson, Daniel P.; Rhee, Soo Hyun; Whisman, Mark A.; Corley, Robin P.; Hewitt, John K. – Child Development, 2013
This multiwave longitudinal study tested two quantitative genetic developmental models to examine genetic and environmental influences on exposure to negative dependent and independent life events. Participants (N = 457 twin pairs) completed measures of life events annually from ages 9 to 16. The same genetic factors influenced exposure to…
Descriptors: Genetics, Environmental Influences, Experience, Longitudinal Studies
Vitaro, Frank; Brendgen, Mara; Boivin, Michel; Cantin, Stephane; Dionne, Ginette; Tremblay, Richard E.; Girard, Alain; Perusse, Daniel – Child Development, 2011
This study used the monozygotic (MZ) twin difference method to examine whether differences in friends' aggression increased the differences in MZ twins' aggression and depressive symptoms from kindergarten to Grade 1 and whether perceived victimization by the friend played a mediating role in this context. Participants were 223 MZ twin pairs.…
Descriptors: Twins, Kindergarten, Grade 1, Gender Differences
Saudino, Kimberly J.; Plomin, Robert – Child Development, 2007
Although a negative association between hyperactivity and academic achievement is well documented, little is known about the genetic and/or environmental mechanisms responsible for the association. The present study explored links between parent and teacher ratings of hyperactive behavior problems and teacher-assessed achievement in a sample of…
Descriptors: Behavior Problems, Hyperactivity, Genetics, Academic Achievement
Iervolino, Alessandra C.; Hines, Melissa; Golombok, Susan E.; Rust, John; Plomin, Robert – Child Development, 2005
The genetic and environmental etiologies of sex-typed behavior were examined during the preschool years in a sample of 3,990 three- to four-year-old twin and nontwin sibling pairs. Results showed moderate genetic and significant shared environmental influence for boys and substantial genetic and moderate shared environmental influence for girls.…
Descriptors: Sex Role, Environmental Influences, Siblings, Twins
