Too Much of a Good Thing? How Breadth of Extracurricular Participation Relates to School-Related Affect and Academic Outcomes During Adolescence

Although adolescents often participate in multiple extracurricular activities, little research has examined how the breadth of activities in which an adolescent is involved relates to school-related affect and academic performance. Relying on a large, multi-ethnic sample (N = 864; 55.9% female), the current study investigated linear and non-linear relationships of 11th grade activity participation in four activity domains (academic/leadership groups, arts activities, clubs, and sports) to adolescents’ sense of belonging at school, academic engagement, and grade point average, contemporarily and in 12th grade. Results of multiple regression models revealed curvilinear relationships for sense of belonging at school in 11th and 12th grade, grade point average in 11th grade, and academic engagement in 12th grade. Adolescents who were moderately involved (i.e., in two domains) reported a greater sense of belonging at school in 11th and 12th grade, a higher grade point average in 11th grade, and greater academic engagement in 12th grade, relative to those who were more or less involved. Furthermore, adolescents’ sense of belonging at school in 11th grade mediated the relationship of domain participation in 11th grade to academic engagement in 12th grade. This study suggests that involvement in a moderate number of activity domains promotes positive school-related affect and greater academic performance. School policy implications and recommendations are discussed.     

海峡两岸财务预测制度的比较

在证券市场国际化的趋势下,会计也在趋于国际协调,而海峡两岸关系密切,经济互动频繁,因此本文对海峡两岸在信息提供者、披露时点、财务预测更正更新、管理当局责任等财务预测制度的四个方面进行比较研究,指出差异,并提出中国大陆在财务预测制度改进的建议。     

高校“音乐欣赏”选修课开设的几个问题

在高校教学过程中,选修课日益成为一道亮丽的风景,如何开设选修课以发挥其最大的教学功能,这是教育工作者普遍关注的问题.高校"音乐欣赏"选修课的开设一要明确教学目的,二要突破定向思维,三要设计课堂形式,四要增强师生交流.     

行政问责制的法制构建

行政问责制是政府官员向社会公众和民意机关承担政治责任的一种政治法律制度。我国现行的行政问责制存在问责事由狭窄、对象不清、主体越位与缺位并存,责任不明、落实不力和程序不规范等问题。为此,我们需要明确行政问责制的要素构造与运行机制,加强人大的问责职能,完善政府绩效评估、行政公开、新闻监督等配套制度,同时要壮大第三部门,强化社会监督。     

Friends in Activities,School-related Affect,and Academic Outcomes in Diverse Middle Schools

Participating in school-based activities is linked to positive academic engagement and achievement, but less is known about how peer relationships within activities affect these outcomes. The current study examined friends in extracurricular activities as a predictor of academic outcomes in multiethnic middle schools in California. Specifically, the mediating role of school belonging, and interactions by ethnicity and type of activity, were examined in a sample including African American or Black, East or Southeast Asian, White, and Latino youth in extracurricular activities (N?=?2268; M_age?=?13.36 in eighth grade; 54% female). The results of multilevel mediational models suggested that school belonging mediated the link between friends in activities and academic outcomes, and these findings replicated across groups based on ethnicity and the type of activity in which one was involved in general. These results are discussed in terms of how activities can be structured to promote positive peer relations in ways that are linked with academic engagement and achievement.     

我国基因专利保护范围界定的思考

基因专利保护范围边界的确定是当前生物科技专利领域中争论的焦点之一。专利保护范围决定着专利垄断权的实际价值，基因专利保护范围直接影响着生物技术产业的发展。主要梳理美国、德国、瑞士和日本在基因专利保护范围上的发展变迁趋势，同时初步探讨对我国基因专利保护范围界定方面给予的启示。     

从犯的犯罪既遂认定问题

从犯的犯罪既遂认定是共同犯罪既遂认定中的一个分支问题,较难引起学术界的注意,但其对共同犯罪既遂理论及刑事司法实践的发展不无积极意义.结合共同犯罪及犯罪既遂的相关理论.对以从犯形式而存在的组织犯、教唆犯、帮助犯、实行犯的犯罪既遂问题分别予以阐述.     

经济全球化及其理论合理性质疑

随着人类科学技术的发展,世界各地人们之间的距离在不断缩短。人类社会的许多问题都成为全球性的问题,经济生活也不例外。本文深入地对现存的全球性经济进行分析,对其理论成因进行探讨。指出现存的经济全球化理论形式并不是基于现实社会的形式,因此不会长久。     

急性心功能障碍大鼠心肌中BNP的表达

目的研究大鼠急性心功能障碍时心肌组织中脑钠肽(brain natriuretic peptide,BNP)的表达变化,探讨BNP在急性心功能障碍的法医学诊断中的应用价值。方法建立大鼠急性心功能障碍模型,运用免疫组织化学、Western印迹法、实时RT-PCR等技术检测心功能障碍过程中心肌组织BNP蛋白和BNP mRNA的表达变化。结果随心功能障碍持续时间增加,免疫阳性着色不断增强。1～2h主要表现为弱阳性,4～6h心肌细胞主要表现为阳性,10～12h大鼠心肌细胞表现为强阳性。Western印迹法和实时RT-PCR结果均显示,随心功能障碍持续时间增加,BNP明显升高,而且心功能障碍1h即能观察到BNP mRNA显著升高。结论检测心肌组织中BNP蛋白及BNP mRNA的表达能为法医病理学工作者客观评价心功能状态提供一种新的途径。