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   444篇
  免费   24篇
管理学   32篇
民族学   1篇
人口学   46篇
丛书文集   3篇
理论方法论   62篇
综合类   8篇
社会学   303篇
统计学   13篇
  2023年   5篇
  2022年   1篇
  2021年   1篇
  2020年   9篇
  2019年   16篇
  2018年   22篇
  2017年   25篇
  2016年   16篇
  2015年   19篇
  2014年   9篇
  2013年   71篇
  2012年   22篇
  2011年   22篇
  2010年   21篇
  2009年   17篇
  2008年   15篇
  2007年   21篇
  2006年   15篇
  2005年   22篇
  2004年   18篇
  2003年   20篇
  2002年   12篇
  2001年   15篇
  2000年   5篇
  1999年   5篇
  1998年   5篇
  1997年   6篇
  1996年   8篇
  1995年   4篇
  1993年   2篇
  1992年   3篇
  1991年   1篇
  1990年   4篇
  1989年   2篇
  1987年   3篇
  1985年   1篇
  1983年   1篇
  1980年   2篇
  1979年   1篇
  1978年   1篇
排序方式: 共有468条查询结果,搜索用时 15 毫秒
461.
462.
463.
The federal government increasingly expects child welfare systems to be more responsive to the needs of their local populations, connect strategies to results, and use continuous quality improvement (CQI) to accomplish these goals. A method for improving decision making, CQI relies on an inflow of high-quality data, up-to-date research evidence, and a robust organizational structure and climate that supports the deliberate use of evidence for decision making. This article describes an effort to build and support these essential system components through one public-private child welfare agency–university partnership.  相似文献   
464.
This study utilized qualitative content analysis to examine messages conveyed about alcohol and other drugs by urban Black mothers (N = 130) with a personal, familial, or personal and familial history of problematic substance use to younger and older adolescents (M = 15.2 years). Data from a two‐cohort longitudinal sample revealed considerable similarity in themes across the younger and older cohorts. Results suggest Black mothers offer more messages of information and advice to younger adolescents, while communicating directives related to use to older adolescents.  相似文献   
465.
This study examined parents' provision of academic structure, and whether they implement it in an autonomy supportive or controlling manner, in relation to children's competence‐related beliefs, motivation, and academic behavior over the transition to middle school. Interviews with 160 sixth‐grade children were coded on parental structure and autonomy support. Children reported on their competence‐related beliefs, motivation, and engagement in sixth and seventh grades. Regression analyses showed that higher structure predicted seventh‐grade perceived competence, intrinsic motivation, engagement, and English grades, controlling for these same outcomes at sixth grade. Autonomy support predicted perceived competence, autonomous motivation, and English grades, controlling for prior outcomes. Structural equation models indicated that relations between structure and engagement and between autonomy support and grades were mediated by perceived competence.  相似文献   
466.
There is considerable debate surrounding the choice of methods to estimate information fraction for futility monitoring in a randomized non-inferiority maximum duration trial. This question was motivated by a pediatric oncology study that aimed to establish non-inferiority for two primary outcomes. While non-inferiority was determined for one outcome, the futility monitoring of the other outcome failed to stop the trial early, despite accumulating evidence of inferiority. For a one-sided trial design for which the intervention is inferior to the standard therapy, futility monitoring should provide the opportunity to terminate the trial early. Our research focuses on the Total Control Only (TCO) method, which is defined as a ratio of observed events to total events exclusively within the standard treatment regimen. We investigate its properties in stopping a trial early in favor of inferiority. Simulation results comparing the TCO method with alternative methods, one based on the assumption of an inferior treatment effect (TH0), and the other based on a specified hypothesis of a non-inferior treatment effect (THA), were provided under various pediatric oncology trial design settings. The TCO method is the only method that provides unbiased information fraction estimates regardless of the hypothesis assumptions and exhibits a good power and a comparable type I error rate at each interim analysis compared to other methods. Although none of the methods is uniformly superior on all criteria, the TCO method possesses favorable characteristics, making it a compelling choice for estimating the information fraction when the aim is to reduce cancer treatment-related adverse outcomes.  相似文献   
467.
Evidence indicates that being overly dependent on the teacher places children's academic and socioemotional development at risk. However, little is known about what predicts dependency on the teacher or how the quality of interactions occurring within the classroom peer system may impact how children relate to their teacher the following school year. The current study tested the proposition that peer victimization may result in negative perceptions of classmates (i.e., peer beliefs), leading to overreliance on teachers. Data were collected from 365 children in the fall and spring of their third/fourth grade year and the fall of their fourth/fifth grade year (195 girls; Mage = 8.92 years; 86.8% white). Peer-reports of peer victimization and self-reports of peer beliefs were collected at each wave of the study. Teacher-reports of dependency were collected in the fall of the first and second years of the study. Path analyses showed that for boys peer victimization directly predicted higher levels of dependency on the next year's teacher, and, for boys and girls, peer victimization indirectly predicted dependency through lower levels of prosocial peer beliefs. Supplemental analyses assessing teacher-child conflict and closeness confirmed that findings were unique to dependency. These results underscore how children's perceptions of their classmates may contribute to dependency in their relationships with teachers and highlight the need for further research into the transactional and cumulative impact of difficulties within peer and teacher relationships.  相似文献   
468.
Studies investigating services for families experiencing complex and multiple problems have emphasized the need for more child-centred support. The aim of this longitudinal study was to investigate whether providing child-centred services (Child and Youth Coaching) combined with family-focused services (Ten for the Future) is effective for children growing up in families experiencing complex and multiple problems. Children's psychosocial skills, emotional and behavioural problems, and the quality of their pedagogical environment were measured at baseline, 6 months and 12 months. Parent and coach reports of children indicated for Child and Youth Coaching (n = 57) and nonindicated children (n = 18) were analysed using repeated measures multilevel models. Both parents and coaches reported improved psychosocial skills of children, but changes were only significant for coach reports. In both reports, no significant decrease in emotional and behavioural problems was observed for both indicated and nonindicated children. Many children still experienced considerable problems at case closure. Furthermore, no significant improvement in quality of the pedagogical environment was observed in both groups. Given the limitations in this study, more research is needed to identify whether these findings can be replicated and attributed to the Child and Youth Coaching and Ten for the Future programmes.  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