全文获取类型
收费全文 | 174篇 |
免费 | 17篇 |
专业分类
各国政治 | 10篇 |
工人农民 | 40篇 |
世界政治 | 12篇 |
外交国际关系 | 11篇 |
法律 | 93篇 |
中国政治 | 2篇 |
政治理论 | 23篇 |
出版年
2023年 | 6篇 |
2022年 | 1篇 |
2021年 | 5篇 |
2020年 | 11篇 |
2019年 | 11篇 |
2018年 | 13篇 |
2017年 | 12篇 |
2016年 | 16篇 |
2015年 | 10篇 |
2014年 | 11篇 |
2013年 | 27篇 |
2012年 | 11篇 |
2011年 | 10篇 |
2010年 | 5篇 |
2009年 | 4篇 |
2008年 | 10篇 |
2007年 | 6篇 |
2006年 | 3篇 |
2005年 | 2篇 |
2004年 | 6篇 |
2003年 | 2篇 |
2002年 | 2篇 |
1997年 | 2篇 |
1996年 | 2篇 |
1995年 | 1篇 |
1987年 | 2篇 |
排序方式: 共有191条查询结果,搜索用时 15 毫秒
51.
Jennifer P. Agans Robey B. Champine Lisette M. DeSouza Megan Kiely Mueller Sara Kassie Johnson Richard M. Lerner 《Journal of youth and adolescence》2014,43(6):919-932
Prior research has demonstrated that participation in out-of-school time activities is associated with positive and healthy development among adolescents. However, fewer studies have examined how trajectories of participation across multiple activities can impact developmental outcomes. Using data from Wave 3 (approximately Grade 7) through Wave 8 (approximately Grade 12) of the 4-H Study of Positive Youth Development, this study examined patterns of breadth in out-of-school time participation in activities and associated outcomes in positive youth development (PYD), Contribution to self and community, risk behaviors, and depressive symptoms. We assessed 927 students (on average across waves, 65.4 % female) from a relatively racially and ethnically homogeneous sample (about 74 % European American, across waves) with a mean age in Wave 3 of 12.98 years (SD = 0.52). The results indicated that high likelihood of participation in activities was consistently associated with fewer negative outcomes and higher scores on PYD and Contribution, as compared to low likelihood of participation in activities. Changes in the breadth of participation (in particular, moving from a high to a low likelihood of participation) were associated with increased substance use, depressive symptoms, and risk behaviors. Limitations of the current study, implications for future research, and applications to youth programs are discussed. 相似文献
52.
Megan L. Mayberry Dorothy L. Espelage Brian Koenig 《Journal of youth and adolescence》2009,38(8):1038-1049
This study tested a social-ecological model of adolescent substance use. Multilevel modeling was used to investigate how systems,
such as parents, peers, schools, and communities, directly influence and interact together to influence adolescent substance
use. Participants included 14,548 (50.3% female) middle school students who were 78.6% White, 5.4% Biracial, 4.8% Asian, 4.8%
Black, and 3.6% Hispanic. Participants completed a survey with scales assessing substance use, peer influences, parental influences,
and characteristics of their school and community. Hierarchical linear modeling (HLM) was used to consider the variation of
parental and peer influences on substance use and how schools and communities relate to both substance use and the relationship
between substance use and peer and parental factors. Results indicated that a positive school climate and a positive sense
of community were associated with less adolescent substance use and that a positive sense of community moderated the relation
between peer and parental influence on adolescent substance use, thereby acting as a protective factor.
相似文献
Brian KoenigEmail: |
53.
Schad MM Szwedo DE Antonishak J Hare A Allen JP 《Journal of youth and adolescence》2008,37(3):346-358
The broader context of relational aggression in adolescent romantic relationships was assessed by considering the ways such
aggression emerged from prior experiences of peer pressure and was linked to concurrent difficulties in psychosocial functioning.
Longitudinal, multi-reporter data were obtained from 97 adolescents and their best friends at age 15 and from adolescents
and their romantic partners at age 18. Teens’ relational aggression and romantic partners’ victimization were predicted from
levels of best friends’ pressuring behaviors toward teens in an observed interaction as well as from best friends’ ratings
of how much pressure teens experienced from their peer group. Romantic partner relational aggression and teen victimization
were predicted by pressure from teens’ peer group only. Adolescents’ romantic relational aggression and victimization were
also associated with elevated levels of depressive symptoms and increased alcohol use. Results are discussed in terms of the
connection of relational aggression in romantic relationships to the broader task of establishing autonomy with peers in psychosocial
development.
相似文献
Megan M. SchadEmail: |
54.
Megan E. Hatch 《Housing Policy Debate》2017,27(1):98-119
There are many federal, state, and local laws governing the landlord–tenant relationship. Yet scholars know little about their variety and what impact differences among jurisdictions have on renters and rental housing markets. This article examines state-level landlord–tenant policy approaches to determine whether there is significant policy variation and whether states illustrate identifiable policy types. Using cluster and discriminant analysis, this research creates a typology of landlord–tenant policy approaches, finding three distinctive approaches: protectionist, probusiness, and contradictory. This research indicates there is significant variation among state landlord–tenant statutory policies, although states’ laws generally reflect one of three philosophies. These results are important for future studies on rental housing because treating all state rental environments the same masks important differences in rental experiences across states. As an illustration, this article finds that renters in protectionist and contradictory states move significantly more than renters in probusiness states do. Furthermore, understanding where renters have more or less legal protection allows policymakers and advocates to focus their efforts on areas where assistance is most needed. 相似文献
55.
56.
Negative physical and verbal interactions occurring between early adolescents and their closest-spaced sibling were examined. Two hundred forty-four junior high school students provided information concerning their experiences as victims and perpetrators of aggressive and agonistic behaviors. Results confirm earlier studies' findings that siblings engage in numerous hostile interactions and that females and males perform these behaviors to an almost equal extent. Participants' self-reports suggest that parents may underestimate sibling use of physical force to resolve conflicts. Findings indicate there is further need to examine sibling interactions in order to better understand family functioning and family violence. 相似文献
57.
58.
59.
Megan Mucioki Gordon M. Hickey Lutta Muhammad Timothy Johns 《Development in Practice》2016,26(2):137-148
This article examines contemporary challenges of formal seed sector participation for resource-poor farmers in Tharaka and engages in a wider discussion of national seed policy and formal seed sector development in Kenya. While many farmers reported utilising modern seed varieties developed by the formal seed sector, the majority of these were introduced through seed aid and maintained through seed saving, supporting seed system integration strategies. Building on these findings, the article discusses ways in which national seed policy in Kenya might be refined to better meet national and regional development goals focused on decreasing the incidence of hunger and poverty. 相似文献
60.