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161.
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163.
A Methylome‐Wide Association Study of Trajectories of Oppositional Defiant Behaviors and Biological Overlap With Attention Deficit Hyperactivity Disorder 下载免费PDF全文
Edward D. Barker Esther Walton Charlotte A.M. Cecil Richard Rowe Sara R. Jaffee Barbara Maughan Thomas G. O'Connor Argyris Stringaris Alan J. Meehan Wendy McArdle Caroline L. Relton Tom R. Gaunt 《Child development》2018,89(5):1839-1855
In 671 mother–child (49% male) pairs from an epidemiological birth cohort, we investigated (a) prospective associations between DNA methylation (at birth) and trajectories (ages 7–13) of oppositional defiant disorder (ODD), and the ODD subdimensions of irritable and headstrong; (b) common biological pathways, indexed by DNA methylation, between ODD trajectories and attention deficit hyperactivity disorder (ADHD); (c) genetic influence on DNA methylation; and (d) prenatal risk exposure associations. Methylome‐wide significant associations were identified for the ODD and headstrong, but not for irritable. Overlap analysis indicated biological correlates between ODD, headstrong, and ADHD. DNA methylation in ODD and headstrong was (to a degree) genetically influenced. DNA methylation associated with prenatal risk exposures of maternal anxiety (headstrong) and cigarette smoking (ODD and headstrong). 相似文献
164.
Youth-movements in Israel are non-formal organizations that educate for social and political involvement and provide a broad platform for youth involvement in the community. This study explored the question: does the social activism of adolescents who both elect for membership in youth movements and a leadership role of instructing younger members also reflect itself in environmentalism? In a survey of 1496 young instructors drawn from 15 official youth movements, findings on environmental literacy variables show youth are only generally knowledgeable about environmental problems; express ‘technical-optimism’ which leads them to limited concern for the environment; show limited recognition of the importance of environmental education, and show limited acknowledgment of the necessity for changes in personal consumerism. Findings also show that environmental issues are not on their mind since they are not a conversation topic with peers or family. Nonetheless, these youth also demonstrate strong self-efficacy to effect change; view themselves as role models for younger members; and express willingness to include environmentally-supportive activities within regular youth movement activities. Their valuing of nature also provides a foundation for building other environmental values. Further analysis shows how these findings can contribute theoretical and practical tools for incorporating sustainability within the youth movement framework, and help realize their potential for promoting sustainability in society. 相似文献
165.
Mirva Rottensteiner Sara Mäkelä Leonie H. Bogl Timo Törmäkangas Jaakko Kaprio Urho M. Kujala 《European Journal of Sport Science》2017,17(9):1184-1193
Purpose: The benefits of physical activity (PA) in preventing abdominal obesity are well recognized, but the role of different sport disciplines remains open. We aimed, therefore, to investigate how participation in different sport disciplines, and the number and types of sports engaged in are associated with waist circumference (WC) in young adulthood. Methods: This population-based cohort study comprised 4027 Finnish twin individuals (1874 men), with a mean age of 34 y (32–37), who answered a survey, including self-measured WC. We extracted the number and identified the types (aerobic, power, and mixed) of the different sport disciplines respondents reported participating in. Results: The number of sport disciplines participated in was inversely associated with WC, the linear decrease averaging 1.38?cm (95% CI 1.10–1.65) per each additional sport discipline. The result persisted after adjustment for the main covariates, such as volume of PA and diet quality. Among dizygotic twin pairs discordant for sports participation (0–2 vs. 5 or more disciplines), the mean within-pair difference in WC was 4.8?cm (95% CI 0.4–9.1) for men and 11.2?cm (95% CI 4.4–18.0) for women; among discordant monozygotic pairs, no differences were observed. In men, all three types of sports were individually associated with smaller WC, while in women, only mixed and power sports showed this association. Conclusions: Participation in several sport disciplines and sport types was associated with smaller WC among young adults in their mid-30s. Shared genetic background may explain some of the associations. 相似文献
166.
Does it matter who your schoolmates are? An investigation of the association between school composition,school processes and mathematics achievement in the early years of primary education 下载免费PDF全文
Tinneke Boonen Sara Speybroeck Jerissa de Bilde Carl Lamote Jan Van Damme Patrick Onghena 《British Educational Research Journal》2014,40(3):441-466
Although many studies have focused on the importance of school composition for student achievement, there is still no consensus on whether school composition matters to student achievement, and, if so, why. Therefore, the present study investigates the association between school composition and mathematics achievement at the end of second grade in Flanders. International research points to the initial ability level, SES, ethnicity and sex composition of the school as potential variables in explaining differences in student achievement. Moreover, some researchers suggest that schools ‘react’ to their student body and for that reason we investigated the possible association between school composition and school processes. Data from the SiBO Project have been analyzed using multilevel regression and multilevel mediation analysis. The results showed no direct school composition effects with respect to prior achievement, SES, ethnicity and sex on math achievement. We found two small differential effects, indicating that mean school prior achievement seems to positively affect initially high achievers, and the proportion of minority students in school seems to negatively affect students speaking a non‐European language except for Turkish, Arabic or Berber at home. Furthermore, two small indirect effects were found which suggest that schools with a high mean prior achievement or a high mean SES keep in regular contact with their students' parents and this, in turn, appears to enhance students' math achievement. Overall, our results seem to indicate that school composition in the early years of primary education hardly matters. 相似文献
167.
The paper argues that in recent years sociologists have neglected the processes of occupational socialisation of leaching, despite research interest in everyday life in other educational settings. Shortcomings in the extant research on teacher socialisation and in the wider literature on professional socialisation are detailed to explain the lack of intellectual interest in teacher socialisation. Finally, the paper offers some potential lines for the development of research on teacher socialisation.
Just as we need to know more about how children are transformed into pupils, so must we know more about how young persons (usually college students) are transformed into teachers
(Wax & Wax, 1971, pp. 10‐11)