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   727篇
  免费   51篇
管理学   52篇
民族学   9篇
人才学   3篇
人口学   64篇
丛书文集   6篇
理论方法论   99篇
综合类   4篇
社会学   515篇
统计学   26篇
  2023年   16篇
  2022年   3篇
  2021年   9篇
  2020年   35篇
  2019年   60篇
  2018年   68篇
  2017年   70篇
  2016年   45篇
  2015年   40篇
  2014年   39篇
  2013年   131篇
  2012年   36篇
  2011年   37篇
  2010年   26篇
  2009年   15篇
  2008年   17篇
  2007年   22篇
  2006年   11篇
  2005年   8篇
  2004年   17篇
  2003年   12篇
  2002年   8篇
  2001年   3篇
  2000年   8篇
  1999年   3篇
  1998年   2篇
  1997年   5篇
  1996年   6篇
  1995年   3篇
  1994年   1篇
  1992年   5篇
  1989年   1篇
  1988年   3篇
  1987年   2篇
  1986年   1篇
  1985年   1篇
  1983年   2篇
  1982年   2篇
  1978年   2篇
  1974年   1篇
  1973年   1篇
  1971年   1篇
排序方式: 共有778条查询结果,搜索用时 15 毫秒
101.
ABSTRACT

Grandfamilies, family structures in which grandparent(s) co-reside with and assume a primary caregiving role for at least one grandchild, are increasingly common in the United States. This qualitative, exploratory study, informed by family communication patterns theory (FCPT), illuminated the reported communication beliefs and practices of grandparents who serve as primary caregiver to at least one grandchild. Hybrid thematic analysis, combining FCTP with inductive analysis, was used to analyze 21 semi-structured interviews with grandparents. Results yielded four themes describing grandparents’ reported communicative practices: creating opportunities for listening and dialogue, talking about emotion, emphasizing openness, and allowing questioning; and three themes describing the impact of second-chance parenting: increased resources, acquired wisdom, and matured emotionally. Implications for grandfamily communication research in light of hybrid analyses and FCPT are discussed.  相似文献   
102.
Abstract

Objective: The current study aims to validate the PERMA-Profiler, a well-known well-being measure, among a sample of student veterans. Participants: A sample of 205 student veterans were recruited from universities across the United States. Method: Cross-sectional research design was used in this study. Measurement structure of the PERMA-Profiler was evaluated using exploratory factor analysis (EFA). Convergent, divergent, and criterion-related validity was tested using Pearson correlation coefficients and Kruskal-Wallis test. Results: The EFA results yielded a two-factor solution for student veterans. Factors are named as emotional character strengths and performance character strengths. Conclusions: The PERMA-Profiler is a multidimensional scale with good reliability and acceptable levels of convergent, divergent, and criterion-related validity. The PERMA-Profiler can help researchers and practitioners better gauge well-being in student veterans. Implications will be discussed.  相似文献   
103.
VOLUNTAS: International Journal of Voluntary and Nonprofit Organizations - Within the field of international relations, scholarship supports the notion that international non-governmental...  相似文献   
104.
Abstract

Objective: The purpose of this study was to explore differences in oral health among students by military service status in postsecondary settings. Participants: Secondary data were obtained from the American College Health Association’s 2011–2014 National College Health Assessment II. Method: Demographic characteristics of the study sample were explored by calculating frequencies and percentages by military service status. Research questions were explored with maximum likelihood multiple logistic regression. Results: Service member and veteran students are at greater risk for neglecting health behaviors associated with positive oral health, including that they were less likely to get dental exams and that those who deployed in the past were the least likely to be practicing good oral health. Conclusions: The results suggest that improving oral health will contribute to improving health and mental health outcomes in this population, and provide important information for health specialists working with service members and veterans on college campuses.  相似文献   
105.
This study examined whether family help seeking and family support represented the same or distinct constructs and prospective associations between emergent constructs and psychosocial outcomes. Data were from 1,713 school‐based adolescents participating in a randomized controlled trial, in Victoria, Australia. Family help seeking emerged as a single factor, distinct from family support, and was prospectively associated with improved psychosocial outcomes. Father closeness predicted lower depressive symptoms. Family help seeking predicted higher help seeking for peers. Interactions between family help seeking and family support on psychosocial outcomes were not apparent. Findings highlight the importance of examining family help seeking and family support separately in future studies of adolescents' help‐seeking behavior.  相似文献   
106.
107.
ABSTRACT

The optimal learner for prediction modeling varies depending on the underlying data-generating distribution. Super Learner (SL) is a generic ensemble learning algorithm that uses cross-validation to select among a ‘library’ of candidate prediction models. While SL has been widely studied in a number of settings, it has not been thoroughly evaluated in large electronic healthcare databases that are common in pharmacoepidemiology and comparative effectiveness research. In this study, we applied and evaluated the performance of SL in its ability to predict the propensity score (PS), the conditional probability of treatment assignment given baseline covariates, using three electronic healthcare databases. We considered a library of algorithms that consisted of both nonparametric and parametric models. We also proposed a novel strategy for prediction modeling that combines SL with the high-dimensional propensity score (hdPS) variable selection algorithm. Predictive performance was assessed using three metrics: the negative log-likelihood, area under the curve (AUC), and time complexity. Results showed that the best individual algorithm, in terms of predictive performance, varied across datasets. The SL was able to adapt to the given dataset and optimize predictive performance relative to any individual learner. Combining the SL with the hdPS was the most consistent prediction method and may be promising for PS estimation and prediction modeling in electronic healthcare databases.  相似文献   
108.
Although teams benefit from developing plans and processes that boost efficiency and reduce uncertainty, they may become too attached to these plans and escalate commitment when an alternative response is needed. Drawing on theories of team leadership, team processes and escalation of commitment, we propose that a change in leadership can help the team reduce commitment to outdated plans and avoid further escalation over time. Across two studies, we tested and found support for our hypotheses and provide evidence that leadership change can break the cycle of escalation by enhancing leader-driven team reflection and refocusing the team on error correction instead of additional investment. We discuss how the results of these studies extend existing theory and add to our understanding of the important role leaders play in enhancing team adaptation and preventing team escalation.  相似文献   
109.
110.
ABSTRACT

This study explores living conditions of people in Senegalese fishing communities in relation to environmental change and unregulated fishing by foreign boats, weakening local opportunities and increasing forced migration of youth, creating problems for the future development of local fishery communities. It employs a postcolonial perspective and analyzes data collected through interviews with individuals from Senegalese fishing communities, social workers and relevant documents. The results show local reactions based on alliances between social workers and local community members to overfishing and the need for national and global structural changes. It is argued that EU’s fishing agreements with Senegalese government is one of the reasons behind youths’ forced migration to EU countries and that the betterment of the living conditions of fishery communities in Senegal requires not only already emerging alliances between social workers and local community members, but also national and global structural changes to protect Africa’s fishing communities and local fisheries.  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