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871.
Research on relational aggression has drawn attention to how girls may be likely to aggress, but the role of gender is not fully understood. There are opposing views regarding whether relational aggression is most common among girls. Current findings demonstrate that when gender differences in relational aggression are assessed with peer nominations, gender differences favoring girls are more likely: (1) in adolescence than childhood; and (2) when statistical overlap with overt aggression is controlled. Results also indicated that associations of relational aggression with peer acceptance depend on the aggressor's gender, the peer rater's gender, and whether overlap with overt aggression is controlled. Associations of relational aggression with lower acceptance became non‐significant when overt aggression was controlled, suggesting that relational aggression displayed in isolation may not damage acceptance. In fact, in mid‐adolescence, girls’ relational aggression predicted greater liking by boys. Reducing relational aggression among adolescent girls may be especially challenging if the behavior is linked with acceptance by boys. 相似文献
872.
C. B. García J. García Pérez J. R. van Dorp 《Statistical Methods and Applications》2011,20(4):463-486
A prevalence of heavy-tailed, peaked and skewed uncertainty phenomena have been cited in literature dealing with economic,
physics, and engineering data. This fact has invigorated the search for continuous distributions of this nature. In this paper
we shall generalize the two-sided framework presented in Kotz and van Dorp (Beyond beta: other continuous families of distributions
with bounded support and applications. World Scientific Press, Singapore, 2004) for the construction of families of distributions with bounded support via a mixture technique utilizing two generating
densities instead of one. The family of Elevated Two-Sided Power (ETSP) distributions is studied as an instance of this generalized
framework. Through a moment ratio diagram comparison, we demonstrate that the ETSP family allows for a remarkable flexibility
when modeling heavy-tailed and peaked, but skewed, uncertainty phenomena. We shall demonstrate its applicability via an illustrative
example utilizing 2008 US income data. 相似文献
873.
874.
Lisa L. Christensen Candyce S. Russell Richard B. Miller Colleen M. Peterson 《Journal of marital and family therapy》1998,24(2):177-188
Open-ended interviews with 24 couples therapy clients regarding their experience of the process of change revealed shifts in clusters of affect, communication, and cognition. Six additional contextual preconditions for change were also identified. The change process within couples was uniformly reported to be gradual. 相似文献
875.
Population,Development and Global Warming: Averting the Tragedy of the Climate Commons 总被引:1,自引:1,他引:0
Carbon emissions from fossil fuel use and other human activity are predicted to cause a significant warming of the global climate, according to a growing consensus of scientists. Global warming would have substantial negative effects on the world environment and economy. Human population and economic growth continue to drive both energy use and carbon emissions. While the developed countries are the largest source of present and past emissions, developing countries are rapidly catching up. China will probably surpass the United States as the largest carbon emitter early in the next century. The global warming treaty signed in Rio in 1992 relies entirely on voluntary emission caps for developed countries and has had little or no apparent effect on emissions. Much stronger steps must be taken to avoid or lessen potential climate change. A globally determined but nationally imposed carbon tax should be adopted to internalize the future costs of carbon emissions into the present cost of fossil fuel and other carbon sources. This would allow the maximum use of free market forces and individual choice to determine how carbon emission reductions are achieved. In addition, national emission caps for all countries should be established. International trade mechanisms can be used to support universal implementation of these measures. Where possible, global warming policy should include strong but equitable incentives for sustainable development and population stabilization, important goals in themselves regardless of the extent of future climate change. 相似文献
876.
877.
Elizabeth C. Hair Kristin A. Moore Sarah B. Garrett Thomson Ling Kevin Cleveland 《Journal of research on adolescence》2008,18(1):187-200
The quality of adolescents' relationships with residential parents has been found to predict many different health and behavioral youth outcomes; strong associations have also been found between these outcomes and family processes, and between relationship quality and family processes. Data from Rounds 1–5 of the National Longitudinal Survey of Youth, 1997 were used to examine hypotheses about the influence of the parent–adolescent relationship on subsequent adolescent mental well‐being and delinquency, as mediated by family processes. Using structural equation modeling, we found that the influence of a positive residential parent–adolescent relationship on better mental well‐being and fewer delinquency was entirely mediated by family routines, parental monitoring, and parental supportiveness, net of sociodemographic controls. 相似文献
878.
波·索德 《内蒙古民族大学学报(社会科学版)》2008,34(6):39-41
该文认为满语构词附加成分-tu很可能来源于蒙古书面语,是在满蒙书面语的相互接触和影响过程中由蒙古语借入满语的。由此,可以看出蒙古书面语对满语产生了很大的影响。 相似文献
879.
Raegen T. MILLER Richard J. MURNANE John B. WILLETT 《International labour review / International Labour Office》2008,147(1):71-89
This article studies the impact of teacher absences on education. Using data spanning three academic years about 285 teachers and 8,631 predominantly economically disadvantaged students from a United States urban school district, it tests assumptions that a substantial portion of teachers' absences is discretionary and that these absences reduce productivity – students' mathematics scores. Since absent teachers are typically replaced by less qualified substitutes, instructional intensity and consistency may decline: ten days of teacher absence reduce students' achievement score by about 3.3 per cent of a standard deviation – enough to lower some students' designation in the state proficiency system and, thus, their motivation to succeed. 相似文献
880.