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   48407篇
  免费   1977篇
  国内免费   13篇
  2020年   506篇
  2019年   532篇
  2018年   765篇
  2017年   793篇
  2016年   876篇
  2015年   658篇
  2014年   787篇
  2013年   4975篇
  2012年   1306篇
  2011年   1346篇
  2010年   898篇
  2009年   904篇
  2008年   1307篇
  2007年   1171篇
  2006年   1127篇
  2005年   991篇
  2004年   978篇
  2003年   983篇
  2002年   989篇
  2001年   1370篇
  2000年   1292篇
  1999年   1044篇
  1998年   570篇
  1997年   531篇
  1996年   662篇
  1995年   647篇
  1994年   604篇
  1993年   597篇
  1992年   1064篇
  1991年   941篇
  1990年   956篇
  1989年   827篇
  1988年   823篇
  1987年   815篇
  1986年   803篇
  1985年   805篇
  1984年   762篇
  1983年   667篇
  1982年   553篇
  1981年   562篇
  1980年   523篇
  1979年   695篇
  1978年   598篇
  1976年   527篇
  1975年   648篇
  1974年   662篇
  1973年   675篇
  1972年   624篇
  1971年   557篇
  1968年   596篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
11.
12.
13.
14.
15.
16.
We investigated motivational and cognitive processes of behavior change with respect to mammography screening. One hundred forty-two women (ages 40 and older) recruited from three worksites answered a 41-item questionnaire consisting of statements based on constructs from the transtheoretical model of behavior change. Principal-components analysis identified two factors: a six-item component representing positive perceptions of mammography (Pros) and a six-item component representing avoidance of mammography (Cons). Analysis of variance showed that Pros, Cons, and a derived Decisional Balance measure (Pros minus Cons) were associated with stage of mammography adoption. Results are consistent with applications of the model to smoking cessation. The model is also discussed as it relates to other theories of behavior change and as a general strategy for analyzing perceptual data pertinent to health-related actions and intentions for behavioral change.  相似文献   
17.
18.
The authors tested effects of a 10-week group cognitive-behavioral stress management intervention among 100 women newly treated for Stage 0-II breast cancer. The intervention reduced prevalence of moderate depression (which remained relatively stable in the control condition) but did not affect other measures of emotional distress. The intervention also increased participants' reports that having breast cancer had made positive contributions to their lives, and it increased generalized optimism. Both remained significantly elevated at a 3-month follow-up of the intervention. Further analysis revealed that the intervention had its greatest impact on these 2 variables among women who were lowest in optimism at baseline. Discussion centers on the importance of examining positive responses to traumatic events--growth, appreciation of life, shift in priorities, and positive affect-as well as negative responses.  相似文献   
19.
20.
There is substantial evidence of detrimental psychological sequelae following disasters, including terrorist attacks. The effect of these events on extreme responses such as suicide, however, is unclear. We tested competing hypotheses about such effects by employing autoregressive integrated moving average techniques to model the impact of September 11 and the Oklahoma City bombing on monthly suicide counts at the local, state, and national level. Unlike prior studies that provided conflicting evidence, rigorous time series techniques revealed no support for an increase or decrease in suicides following these events. We conclude that while terrorist attacks produce subsequent psychological morbidity and may affect self and collective efficacy well beyond their immediate impact, these effects are not strong enough to influence levels of suicide mortality.  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