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   993篇
  免费   44篇
  国内免费   1篇
教育   823篇
科学研究   17篇
各国文化   13篇
体育   37篇
文化理论   5篇
信息传播   143篇
  2023年   9篇
  2022年   10篇
  2021年   20篇
  2020年   23篇
  2019年   44篇
  2018年   48篇
  2017年   61篇
  2016年   64篇
  2015年   42篇
  2014年   57篇
  2013年   228篇
  2012年   38篇
  2011年   50篇
  2010年   33篇
  2009年   32篇
  2008年   36篇
  2007年   44篇
  2006年   26篇
  2005年   21篇
  2004年   24篇
  2003年   18篇
  2002年   14篇
  2001年   12篇
  2000年   9篇
  1999年   7篇
  1998年   2篇
  1997年   3篇
  1996年   8篇
  1995年   4篇
  1994年   3篇
  1993年   2篇
  1992年   3篇
  1990年   3篇
  1989年   1篇
  1988年   1篇
  1987年   2篇
  1986年   5篇
  1985年   7篇
  1984年   4篇
  1983年   5篇
  1982年   4篇
  1981年   1篇
  1980年   3篇
  1979年   2篇
  1976年   1篇
  1974年   2篇
  1973年   1篇
  1966年   1篇
排序方式: 共有1038条查询结果,搜索用时 328 毫秒
71.
72.
Experimental analysis of social stimuli has typically been restricted to the presence or absence of verbal attention. In the present study, an ABAB design was used to assess the influence of proximity as a social stimulus. Close and distant proximity of a familiar adult was systematically manipulated to evaluate the effect of proximity on the on‐task behavior of a 15‐year‐old male with autism. Baseline, experimental analysis, and intervention phases were conducted within a self‐contained classroom. Pronounced effects of distant educator proximity to the participant were evident during both the experimental analysis and intervention, with increased on‐task behavior occurring in the distant condition. Future recommendations for the investigation of proximity as a relevant social stimulus are forwarded. © 2005 Wiley Periodicals, Inc. Psychol Schs 42: 189–196, 2005.  相似文献   
73.
74.
75.
76.
77.

Purpose

The purpose of the present review was to use existing, published data to provide an estimate of the amount of change in six-minute walk test distance (Δ6MWT) that represents a clinically meaningful change in individuals with chronic heart failure (CHF).

Methods

The present review included two separate literature searches of the CINAHL and Medline databases for articles that: (1) reported the intraclass correlation coefficient (ICC) of the 6MWT in individuals with CHF, and (2) used the 6MWT along with either aerobic capacity or health-related quality of life (HRQL) as study endpoints in randomized controlled trials (RCTs) of exercise-based intervention for individuals with CHF. The ICCs were used to calculate the minimum detectable difference (MDD) at the 95% confidence interval for each included study. The Δ6MWT associated with aerobic capacity and HRQL within-group effect sizes for the intervention and control groups in each included RCT was analyzed using receiver operating characteristic (ROC) curves.

Results

Thirteen articles reported the ICC for the 6MWT. The mean (standard deviation) MDD calculated based on these data was 43.1(16.8) m. Eighteen RCTs measured the 6MWT and either aerobic capacity and/or HRQL. A Δ6MWT of 40–45 m was associated with at least moderate aerobic capacity and HRQL effect sizes in the intervention groups. The Δ6MWT thresholds that discriminated between intervention and control groups using ROC curves revealed the following sensitivity/specificity for the respective thresholds: 19 m, 94.4/83.3%, 32 m, 83.3/94.4%, and 48 m 44.4/100% (AUC = .935, p = .009, CI95% .855, 1.015).

Conclusions

A Δ6MWT of approximately 45 m appears to exceed measurement error and be associated with significant changes in either aerobic capacity and/or HRQL.Key Words: heart failure, six-minute walk test, clinically meaningful change, minimum detectable difference  相似文献   
78.
79.
Doulas, women who primarily provide social support during childbirth, have been associated with a number of positive health outcomes. Because the primary model of practice for doulas is a fee-for-service model in which families privately hire a doula, many expectant women who could benefit from doula support are unable to access the service. The Doulas Care program, located in Ann Arbor, Michigan, represents one model in which doulas provide services without charge. As a result of their extended role in the community, doulas who work with the Doulas Care program have unique educational needs. Through the use of focus groups with the program's volunteer doulas, educational needs related to overcoming barriers to being a doula working in the community were identified. Recommendations for education and training are made to improve the support doulas offer as community health outreach workers.  相似文献   
80.
In this column, the author presents summaries of four research studies that further support the benefits of normal birth. The topics of the studies address cord clamping of term infants, the association of multiple cesareans and placental abnormalities, induction of labor at 41 weeks, and the World Health Organization's recently released pediatric growth charts.  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