首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   819篇
  免费   39篇
管理学   110篇
民族学   11篇
人口学   69篇
丛书文集   4篇
理论方法论   86篇
综合类   5篇
社会学   505篇
统计学   68篇
  2023年   5篇
  2022年   3篇
  2020年   19篇
  2019年   31篇
  2018年   26篇
  2017年   36篇
  2016年   33篇
  2015年   20篇
  2014年   19篇
  2013年   134篇
  2012年   34篇
  2011年   33篇
  2010年   23篇
  2009年   25篇
  2008年   34篇
  2007年   23篇
  2006年   26篇
  2005年   28篇
  2004年   29篇
  2003年   21篇
  2002年   20篇
  2001年   21篇
  2000年   12篇
  1999年   20篇
  1998年   12篇
  1997年   13篇
  1996年   13篇
  1995年   14篇
  1994年   6篇
  1993年   7篇
  1992年   11篇
  1991年   11篇
  1990年   6篇
  1989年   5篇
  1988年   6篇
  1987年   5篇
  1986年   6篇
  1985年   6篇
  1984年   10篇
  1983年   3篇
  1982年   4篇
  1981年   7篇
  1979年   4篇
  1977年   5篇
  1976年   4篇
  1975年   5篇
  1974年   2篇
  1973年   5篇
  1972年   4篇
  1970年   2篇
排序方式: 共有858条查询结果,搜索用时 218 毫秒
271.
272.
In this study, we examined bidirectional associations between parental responsiveness and executive function (EF) processes in socioeconomically disadvantaged preschoolers. Participants were 534 3‐ to 5‐year‐old children (71 percent Hispanic/Latino; 28 percent African American; 1 percent European American) attending Head Start programs. At Time 1 (T1) and 6.5 months later at Time 2 (T2), parents and children participated in a videotaped free play session and children completed delay inhibition (gift delay‐wrap, gift delay‐bow) and conflict EF (bear/dragon, dimensional change card sort) tasks. Parental warm acceptance, contingent responsiveness, and verbal scaffolding were coded from the free play videos and aggregated to create a parental responsiveness latent variable. A cross‐lagged panel structural equation model indicated that higher T1 parental responsiveness significantly predicted more positive gain in delay inhibition and conflict EF from T1 to T2. Higher T1 delay inhibition, but not T1 conflict EF, significantly predicted more positive change in parental responsiveness from T1 to T2. These associations were not explained by several possible confounding variables, including children's age, gender, race/ethnicity, and verbal ability. Findings suggest that parental responsiveness may support EF development in disadvantaged children, with reciprocal effects of delay inhibition on parental responsiveness.  相似文献   
273.
In many developed countries there has been a shift from grants to contracts as a source of local public sector funding of the third sector. Smaller third sector organizations may struggle to compete for this funding due to the complex process of accessing and maintaining this funding and conveying their capabilities to funding providers. This study utilizes data from the United Kingdom to determine what factors increase these administrative and communication barriers for smaller organizations. Resources in income and volunteers affect perceptions of the process of obtaining funding. A solution may be standardization of evaluation and monitoring, but this may lead to isomorphism and loss of variety of provision. Better two‐way communication may allow local authorities to retain variety in public service provision through improved knowledge of their partners.  相似文献   
274.
Neighbour balance and evenness of distribution designs help to address user concerns in the two‐dimensional layout of agricultural field trials. This is done by minimising the occurrence of pairwise treatment plot neighbours and ensuring that the replications of treatments are spread out across rows and columns of a trial. Such considerations result in a restriction on the normal randomisation process for a row‐column design which can lead to error variance bias. In this paper, uniformity trial data is used to assess the degree of this bias for both resolvable and non‐resolvable designs. Comparisons are made with a similar investigation using Linear Variance spatial designs.  相似文献   
275.
Childhood maltreatment is associated with a range of adverse mental and physical health outcomes, including increased rates of sexually transmitted infections (STIs) later in life. However, the impact on risky sexual behaviors and pregnancy outcomes has not been adequately studied. This is particularly true for physical abuse, emotional abuse, and neglect. We examined associations between prospectively substantiated childhood maltreatment and reports of risky sexual behaviors by men and women, as well as selected pregnancy outcomes in women. We followed up 3,081 (45.7% female) participants from the Mater-University of Queensland Study of Pregnancy, a prospective Australian birth cohort study. Using logistic regression, we examined the association between substantiated childhood maltreatment from birth to 14 years, and self-reported risky sexual behaviors and youth pregnancy outcomes at the 21-year follow-up. In adjusted analyses, children who had experienced multiple childhood maltreatment exhibited more risky sexual behaviors than their nonmaltreated counterparts. In specific models, those exposed to each form of childhood maltreatment, independent of co-occurring forms of childhood maltreatment, had an increased likelihood of risky sexual behaviors, particularly an early sexual debut and, for women, youth pregnancy. Neglect was also associated with multiple sexual partners, and emotional abuse with higher rates of miscarriage. There was no difference between men and women in how different forms of childhood maltreatment predicted risky sexual behaviors in young adulthood. All forms of substantiated childhood maltreatment, including multiple substantiations, were associated with risky sexual behavior in both sexes as well as higher rates of youth pregnancy in women. Moreover, emotional abuse persistently predicted miscarriages in young adult women. Understanding the association between childhood maltreatment and risky sexual behaviors and youth pregnancy outcomes may help suggest preventive strategies.  相似文献   
276.
277.
278.
To examine how competition influences resource allocation in 4‐ to 6‐year‐olds, children were assigned to one of two conditions. In the experimental condition children colored a picture for a coloring contest whereas in the control condition they colored a picture to decorate a wall. Subsequently, all children participated in a resource allocation task with another child who was introduced as another participant in the coloring contest or who would also be coloring a picture for the wall. Finally, children were asked how many crayons (out of eight) they wanted to provide to the other child. In the resource allocation task, children made decisions about how to allocate stickers to self and other across four trial types: cost and no cost variations of both advantageous and disadvantageous inequality trials. Children were less prosocial in the experimental condition than in the control condition but only in disadvantageous inequality trials involving a cost. Children in the experimental condition withheld more crayons compared to children in the control condition. These results suggest that competition not only decreases prosocial behavior directly linked to the competition but also decreases generosity when provided with an unrelated resource allocation opportunity.  相似文献   
279.
This paper examines the extent to which there may be differences in attitudes toward abortion and intentions when one is faced with making an abortion decision for oneself. Data from a 1977 national survey were used. The results indicated that while such differences existed only on a limited scale in medically indicated situations of abortion, discretionary situations had a sizable proportion of respondents who would approve of abortion for others but would not opt for abortion themselves. The differences in attitudes and intentions were affected by sex, religious behaviors, ideological dimensions of fertility, sexual permissiveness, and freedom of expression.  相似文献   
280.
Social-ecological science in the humane metropolis   总被引:1,自引:0,他引:1  
The Humane metropolis is a rubric to summarize and promote environmental and social quality in contemporary urban mosaics. Because cities, suburbs, and exurbs, as spatially extensive and connected socio-ecological systems, exhibit many negative features, the humane metropolis identifies a strategy to combat the ills and instill more positive and sustainable features and processes in urban systems. Because the humane metropolis as a program has arisen primarily from social motivations, there is the opportunity to articulate more explicitly the role that science can play in addressing the humane metropolis program and evaluating its success. A humane metropolis can be summarized as one that 1) protects and restores ecological services in cities and suburbs, 2) promotes physical and mental health and safety of residents, 3) enhances efficiency by conserving energy, matter, water, and time, 4) facilitates equity by being inclusive, as well as socially and environmentally just, and 5) maintains a sense of community and a sense of place. We clarify the nature of science as a contributor to the social program, pointing out the social values motivating science, and the role that scientific knowledge and metaphor play in linking science with the social program of the humane metropolis. We further identify roles that socio-ecological research can play in meeting the goals of the humane metropolis. We use examples of environmental history, watershed function and restoration, and environmental justice research and action from the Baltimore Ecosystem Study, Long-Term Ecological Research program. The humane metropolis as a social program benefits from scientific contributions that 1) expose hidden ecological processes in urban systems, 2) generate knowledge connecting people and institutions to the biophysical environment, 3) contribute to the civic dialog, and 4) bring scientific values to the prioritization and balancing of the goals of the humane metropolis.  相似文献   
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号