全文获取类型
收费全文 | 875篇 |
免费 | 89篇 |
国内免费 | 24篇 |
专业分类
988篇 |
出版年
2024年 | 3篇 |
2023年 | 25篇 |
2022年 | 2篇 |
2021年 | 8篇 |
2020年 | 28篇 |
2019年 | 51篇 |
2018年 | 63篇 |
2017年 | 56篇 |
2016年 | 54篇 |
2015年 | 32篇 |
2014年 | 39篇 |
2013年 | 250篇 |
2012年 | 24篇 |
2011年 | 12篇 |
2010年 | 13篇 |
2009年 | 16篇 |
2008年 | 23篇 |
2007年 | 24篇 |
2006年 | 34篇 |
2005年 | 34篇 |
2004年 | 17篇 |
2003年 | 43篇 |
2002年 | 18篇 |
2001年 | 14篇 |
2000年 | 15篇 |
1999年 | 22篇 |
1998年 | 13篇 |
1997年 | 8篇 |
1996年 | 6篇 |
1995年 | 8篇 |
1994年 | 6篇 |
1993年 | 7篇 |
1992年 | 1篇 |
1991年 | 4篇 |
1990年 | 1篇 |
1989年 | 1篇 |
1988年 | 1篇 |
1986年 | 3篇 |
1985年 | 1篇 |
1983年 | 1篇 |
1981年 | 2篇 |
1979年 | 2篇 |
1978年 | 1篇 |
1975年 | 2篇 |
排序方式: 共有988条查询结果,搜索用时 15 毫秒
31.
Tara?Saathoff-WellsEmail author Rex?E.?Culp Candace?T.?Yancey 《Journal of child and family studies》2005,14(4):487-503
We investigated perceiver bias in relation to children labeled as sexually abused. Building on recent research indicating
that adults perceive children with such a label as having more behavioral problems and lower achievement, we replicated and
expanded upon an earlier study. We tested undergraduate students (N = 699), who judged a six-year old child's aggressive behavior
in vignettes that varied on severity of the aggressive behavior, child gender, and family history (sexually abused, mother
dying of cancer, normal). Perceiver bias was related to family history label for internalizing behavior problems and competence
issues and child gender for internalizing behavior problems and externalizing behavior problems. Implications for educators
and practitioners are discussed as well as routes for future research. 相似文献
32.
This study examines how religious activity is associated with risk behaviors, concurrently and developmentally among urban African American adolescents. Seven hundred and five African American youths were interviewed annually during high school. Retention rates for the study exceeded 90%. Frequency of religious activity, sexual intercourse, and alcohol, cigarette, and marijuana use were assessed at each wave. Growth curve analyses found negative concurrent associations between religious activity and each of the four risk behaviors. The developmental effects of religious activity varied by gender. Higher levels of religious activity in 9th grade predicted smaller increases in marijuana use among males and cigarette use among females. In addition, larger decreases in religious activity during high school were associated with greater increases in alcohol use among males and sexual intercourse among females. During high school, religious activity limits the development of certain types of risk behavior among African American youth, even after controlling for reciprocal effects. 相似文献
33.
34.
This paper forms an introduction to this issue, the contents of which arose directly or indirectly from a conference in May 2001 on Corruption of scientific integrity? — The commercialisation of academic science. The introduction, in recent decades, of business culture and values into universities and research institutions is incompatible with the openness which scientific and all academic pursuit traditionally require. It has given rise to a web of problems over intellectual property and conflict of interest which has even led to corporate sponsors’ suppressing unfavourable results of clinical trials, to the detriment of patients’ health. Although there are those who see the norms of science developing to recognise the importance of instrumental science aiming at specific goals and of knowledge judged by its value in a context of application, none justifies the covert manipulation of results by vested interest.Public awareness of these problems is growing and creating a climate of opinion where they may be addressed. We suggest a way forward by the introduction of nationally and internationally-accepted guidelines for industrial collaboration which contain proper protections of the core purposes of universities and of the independence of their research. Some codes suggested for this purpose are discussed. We note that some universities are moving to adopt such codes of conduct, but argue the need for strong support from the government through its funding bodies. 相似文献
35.
36.
37.
38.
Guston DH 《Science and engineering ethics》1999,5(2):137-154
Nearly two decades of debate have not settled the definition of research misconduct. The literature provides four explanatory
frameworks for misconduct. The paper examines these frameworks and maps them onto efforts by the U.S. Public Health Service
to define research misconduct and subsequent responses to these efforts by the scientific community. The changing frameworks
suggest that closure will not be achieved without an authoritative effort, which may occur through the Research Integrity
Panel’s recent attempt to create a government-wide definition. 相似文献
39.
40.