全文获取类型
收费全文 | 1687篇 |
免费 | 10篇 |
专业分类
各国政治 | 45篇 |
工人农民 | 159篇 |
世界政治 | 33篇 |
外交国际关系 | 45篇 |
法律 | 1219篇 |
中国共产党 | 1篇 |
中国政治 | 13篇 |
政治理论 | 171篇 |
综合类 | 11篇 |
出版年
2021年 | 11篇 |
2020年 | 12篇 |
2019年 | 7篇 |
2018年 | 87篇 |
2017年 | 25篇 |
2016年 | 105篇 |
2015年 | 29篇 |
2014年 | 19篇 |
2013年 | 46篇 |
2012年 | 130篇 |
2011年 | 93篇 |
2010年 | 11篇 |
2009年 | 33篇 |
2008年 | 16篇 |
2007年 | 20篇 |
2006年 | 20篇 |
2005年 | 396篇 |
2004年 | 109篇 |
2003年 | 27篇 |
2002年 | 19篇 |
2001年 | 19篇 |
2000年 | 6篇 |
1999年 | 14篇 |
1998年 | 5篇 |
1996年 | 3篇 |
1992年 | 21篇 |
1991年 | 23篇 |
1990年 | 30篇 |
1989年 | 39篇 |
1988年 | 28篇 |
1987年 | 27篇 |
1986年 | 30篇 |
1985年 | 21篇 |
1984年 | 14篇 |
1983年 | 14篇 |
1980年 | 3篇 |
1979年 | 10篇 |
1978年 | 10篇 |
1977年 | 5篇 |
1975年 | 14篇 |
1974年 | 24篇 |
1973年 | 14篇 |
1972年 | 17篇 |
1971年 | 19篇 |
1970年 | 14篇 |
1969年 | 7篇 |
1968年 | 11篇 |
1967年 | 10篇 |
1966年 | 7篇 |
1965年 | 5篇 |
排序方式: 共有1697条查询结果,搜索用时 15 毫秒
991.
Using data from a national sample of 388 Latino young adolescents, this study identified the social-demographic characteristics, influences in the broader social environment, and parenting practices that predict youth academic achievement. Youths who were Mexican American, older, and had an English language problem had lower levels of reading and mathematics achievement. Youths of mothers who began childbearing at older ages, had higher levels of intellectual abilities, and reported no English language problem scored better on both types of achievement tests, but poverty was related only to reading achievement. Attendance in higher-rated schools was associated with higher reading and mathematics scores, but residence in better quality neighborhoods was related only to reading achievement. Three parenting practices—providing cognitive stimulation, parent–youth conflict, and academic involvement—predicted both types of achievement. The effect of poverty on reading achievement was explained by residence in lower quality neighborhoods, lower levels of cognitive stimulation, and parent–youth conflict.Associate Professor, University of Illinois at Urbana-Champaign. Received PhD in Social Welfare from the University of Wisconsin – Madison. Research interests include examining the effects of poverty and other risk factors on the well-being of children, adolescents, and families. 相似文献
992.
Laureen?H.?SmithEmail author Barbara?J.?Guthrie Deborah?J.?Oakley 《Journal of youth and adolescence》2005,34(4):361-377
This article critically reviews the literature about adolescent males’ sexuality in order to describe the state of the science and to identify promising concepts and research designs that have the potential to guide the next generation of research. A critique was conducted on 94 peer-reviewed studies of sexual behaviors that included a sample of adolescent males; 11 scholarly texts and 2 dissertations. Most studies lacked a theoretical foundation and had cross-sectional designs. For those studies with a theoretical base, 3 perspectives were most often used to guide research: cognitive, biological, or social-environmental. Studies frequently relied on older adolescents or young adult males to report behaviors during early adolescence. Male-only samples were infrequent. Findings include (a) the measurement of sexual activity is frequently limited to coitus and does not explore other forms of “sex”; (b) cognitive factors have been limited to knowledge, attitudes, and intent; (c) little is known about younger males based on their own self-reports; (d) little is known about the normative sexuality development of gay adolescent males; and (e) longitudinal studies did not take into account the complexities of biological, social, and emotional development in interaction with other influences. Research on adolescent sexuality generally is about sexual activity, with little research that includes cognitive competency or young males’ sense of self as a sexual being. The purpose of the paper is to critically review the literature about male sexuality in order to describe the state of the science as well as to identify potential directions to guide the next generation of adolescent male sexual being research.Assistant Professor in the School of Nursing at Oakland University. Received her PhD in Nursing from the University of Michigan, with a specialization in Health Promotion and Risk Reduction. Research interests include adolescent health behaviors, male sexuality, and fostering youth through community-based, asset-building interventions.Associate Professor and Director for Undergraduate & Non Traditional Programs in the School of Nursing at the University of Michigan. Inducted as a Fellow in the Academy of American Nurses. Received a PhD in Nursing from New York University. Research interests include female adolescent health and health-compromising behaviors, specifically the influence of contextual environments on adolescents’ participation in health promoting or health-compromising behaviors.Professor Emeritus in the School of Nursing and Center for Nursing Research at the University of Michigan. Received a PhD in Public Health from the University of Michigan. Research interests include women’s and men’s contraceptive use behaviors, development of nursing in China, and health policy. 相似文献
993.
Hot spots policing and crime prevention: A systematic review of randomized controlled trials 总被引:1,自引:0,他引:1
Crime scholars and practitioners have argued that police actions should be focused on high-risk crime places rather than spread thinly across the urban landscape. This review examines five randomized controlled trials of the effects of concentrating police enforcement efforts on crime hot spots. The findings of these evaluations suggest that focused police actions can prevent crime and disorder in crime hot spots. A meta-analysis of the effect sizes from the five experiments reveals a statistically significant mean effect size for hot spots policing interventions; this suggests overall reductions in citizen calls for service in the treatment hot spots relative to the control hot spots. These studies also suggest that focused police actions at specific locations do not necessarily result in crime displacement. Although these evaluations reveal that these programs work in preventing crime, additional research is needed to unravel other important policy-relevant issues such as community reaction to focused police enforcement efforts. 相似文献
994.
E. Frank?Stephenson 《Public Choice》2011,148(3-4):445-457
Open primaries create the possibility of strategic crossover voting. On his March 3, 2008 program and subsequent broadcasts, radio personality Rush Limbaugh called on his listeners to extend the Democratic presidential contest by crossing over to vote for Sen. Hillary Clinton. Using voter registration data from North Carolina and election return data from Indiana, North Carolina, and Pennsylvania (states with open, semi-closed, and closed primaries, respectively), I find no evidence of a Limbaugh-motivated switch in political party registration or of a large or statistically significant Limbaugh-motivated increase in voting for Sen. Clinton. 相似文献
995.
Mackinnon SP 《Journal of youth and adolescence》2012,41(4):474-485
As students transition to post-secondary education, they experience considerable stress and declines in academic performance.
Perceived social support is thought to improve academic achievement by reducing stress. Longitudinal designs with three or
more waves are needed in this area because they permit stronger causal inferences and help disentangle the direction of relationships.
This study uses a cross-lagged panel and a bivariate growth curve analysis with a three-wave longitudinal design. Participants
include 10,445 students (56% female; 12.6% born outside of Canada) transitioning to post-secondary education from ages 15–19.
Self-report measures of academic achievement and a generalized measure of perceived social support were used. An increase
in average relative standing in academic achievement predicted an increase in average relative standing on perceived social
support 2 years later, but the reverse was not true. High levels of perceived social support at age 15 did not protect against
declines in academic achievement over time. In sum, perceived social support appears to have no bearing on adolescents’ future
academic performance, despite commonly held assumptions of its importance. 相似文献
996.
Efficacy of an Intervention to Reduce the Use of Media Violence and Aggression: An Experimental Evaluation with Adolescents in Germany 总被引:1,自引:0,他引:1
Several longitudinal studies and meta-analytic reviews have demonstrated that exposure to violent media is linked to aggression
over time. However, evidence on effective interventions to reduce the use of violent media and promote critical viewing skills
is limited. The current study examined the efficacy of an intervention designed to reduce the use of media violence and aggression
in adolescence, covering a total period of about 12 months. A sample of 683 7th and 8th graders in Germany (50.1% girls) were
assigned to two conditions: a 5-week intervention and a no-intervention control group. Measures of exposure to media violence
and aggressive behavior were obtained about 3 months prior to the intervention (T1) and about 7 months post-intervention (T2).
The intervention group showed a significantly larger decrease in the use of violent media from T1 to T2 than the control group.
Participants in the intervention group also scored significantly lower on self-reported aggressive behavior (physical aggression
and relational aggression) at T2 than those in the control group, but the effect was limited to those with high levels of
initial aggression. This effect was mediated by an intervention-induced decrease in the normative acceptance of aggression.
No gender differences in program efficacy were found. The results show that a 5-week school-based intervention can produce
changes in the use of media violence, aggressive norms, and behaviors sustained over several months. 相似文献
997.
Renée Andersson 《Nora, Nordic Journal of Women's Studies》2013,21(3):203-219
This article discusses gender equality and how and why a gender mainstreaming strategy avoids the question of gender conflict. The making of gender-equality work is studied by investigating how feminism is talked about and rejected in a specific gender mainstreaming project in the municipality of Örebro, Sweden. Drawing upon the theoretical concepts of hegemony and discourse, the focus is on the silences—the unspoken questions and problems—surrounding the project. I examine how the exclusion of feminism and conflict is articulated when gender mainstreaming is introduced as a new way of doing gender-equality work in the municipality. The struggles identified show that feminism is rejected because it is seen as being in opposition to (1) professionalism and (2) legitimate political issues. I conclude that within the local discourse of gender mainstreaming there is a notion that this form of gender-equality work ought to be performed without harmful or threatening gender conflicts. This means that the strategy of gender mainstreaming constitutes a short-cut to bypass controversial problems like equal treatment, special efforts for women, and men's privileges in gender-equality work. 相似文献
998.
Malthe Munkøe 《Public Choice》2014,158(3-4):383-397
Social choice theory predicts that political processes are prone to instability or outright chaos, yet the evidence that actual politics is dominated by the phenomena identified in the literature is somewhat anecdotal and widely contested. In order to systematically assess the degree to which politics is affected by cyclicality or chaos as predicted by social choice theorists we study the outcome of the 2009 municipal elections in Denmark. This yields a total of 97 cases, which allows for a systematic assessment of the frequency of cycling through a large-n study. Evidence of four cyclical results is presented. 相似文献
999.
1000.