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   1945篇
  免费   82篇
  2023年   8篇
  2021年   14篇
  2020年   38篇
  2019年   38篇
  2018年   43篇
  2017年   47篇
  2016年   62篇
  2015年   49篇
  2014年   42篇
  2013年   238篇
  2012年   74篇
  2011年   89篇
  2010年   47篇
  2009年   55篇
  2008年   71篇
  2007年   71篇
  2006年   82篇
  2005年   61篇
  2004年   71篇
  2003年   58篇
  2002年   73篇
  2001年   33篇
  2000年   19篇
  1999年   31篇
  1998年   29篇
  1997年   31篇
  1996年   27篇
  1995年   29篇
  1994年   26篇
  1993年   28篇
  1992年   22篇
  1991年   29篇
  1990年   21篇
  1989年   18篇
  1988年   24篇
  1987年   21篇
  1986年   19篇
  1985年   23篇
  1984年   19篇
  1983年   23篇
  1982年   24篇
  1981年   29篇
  1980年   18篇
  1979年   16篇
  1978年   24篇
  1977年   23篇
  1976年   16篇
  1975年   9篇
  1974年   9篇
  1973年   8篇
排序方式: 共有2027条查询结果,搜索用时 15 毫秒
131.
Theoretical Medicine and Bioethics -  相似文献   
132.
Marcus RF 《Adolescence》1999,34(133):33-46
One hundred sixty-three young adolescents (72 males, 91 females) were administered a 23-item self-report inventory measuring antisocial behaviors. Results were analyzed separately for males and females. Exploratory factor analysis showed antisocial behavior to be multidimensional and to have different factor structures for males and females. The three factors accounting for more than two-thirds of the variance in antisocial behavior are discussed in terms of specialization in drug/alcohol use and violence.  相似文献   
133.
The media remains a powerful presence in U.S. culture. It gives people news of world and local events, it entertains, and it may even function as a companion to children. Because it functions as a window to the outside world, what appears across its landscape actually may become people's reality. Thus, the potential for distorting their view of that world is high if the picture provided is unrepresentative of actual events. For example, the prevalence of violent acts on television has been linked to increased aggression and escalating impressions of a dangerous world, and the overrepresentation of youth and beauty may be a causal factor of eating disorders. In this article, we explore the possibility that the media may also serve as a powerful creator of the very public opinions it seeks to reflect in its news. Subtle nonverbal cues of newscasters have been shown to influence voting behavior, and the media's overrepresentation of the proportion of blacks in poverty may decrease whites' support of welfare. By portraying a world in which people's opinions are based on their ethnic or demographic group membership, the media may also subtly but powerfully create the very opinions they seek to reflect.  相似文献   
134.
135.

Volume Contents

heoretical Medicine and Bioethics Index to Volume 20  相似文献   
136.
137.
The purpose of this study was to examine the role of 2 types of social influence--general social support and living with a smoker--on smoking behavior among middle-aged and older women in the Women's Health Initiative (WHI) Observational Study. Participants were postmenopausal women who reported smoking at some time in their lives (N=37,027), who were an average age of 63.3 years at baseline. Analyses used multiple logistic regression and controlled for age, educational level, and ethnicity. In cross-sectional analyses, social support was associated with a lower likelihood and living with a smoker was associated with a higher likelihood of being a current smoker and, among smokers, of being a heavier smoker. Moreover, in prospective analyses among baseline smokers, social support predicted a higher likelihood and living with a smoker predicted a lower likelihood of smoking cessation 1-year later. Further, in prospective analyses among former smokers who were not smoking at baseline, social support predicted a lower likelihood and living with a smoker predicted a higher likelihood of smoking relapse 1-year later. Overall, the present results indicate that social influences are important correlates of smoking status, smoking level, smoking cessation, and smoking relapse among middle-aged and older women.  相似文献   
138.
The pipeline toward careers in science, technology, engineering, and mathematics (STEM) begins to leak in high school, when some students choose not to take advanced mathematics and science courses. We conducted a field experiment testing whether a theory-based intervention that was designed to help parents convey the importance of mathematics and science courses to their high school-aged children would lead them to take more mathematics and science courses in high school. The three-part intervention consisted of two brochures mailed to parents and a Web site, all highlighting the usefulness of STEM courses. This relatively simple intervention led students whose parents were in the experimental group to take, on average, nearly one semester more of science and mathematics in the last 2 years of high school, compared with the control group. Parents are an untapped resource for increasing STEM motivation in adolescents, and the results demonstrate that motivational theory can be applied to this important pipeline problem.  相似文献   
139.
140.
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