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   75858篇
  免费   2830篇
  国内免费   38篇
  2020年   744篇
  2019年   905篇
  2018年   1429篇
  2017年   1426篇
  2016年   1551篇
  2015年   1042篇
  2014年   1203篇
  2013年   6012篇
  2012年   2347篇
  2011年   2512篇
  2010年   1414篇
  2009年   1413篇
  2008年   2153篇
  2007年   2076篇
  2006年   1899篇
  2005年   2789篇
  2004年   2171篇
  2003年   1888篇
  2002年   1677篇
  2001年   2237篇
  2000年   2125篇
  1999年   1667篇
  1998年   877篇
  1997年   789篇
  1996年   741篇
  1995年   735篇
  1993年   684篇
  1992年   1400篇
  1991年   1334篇
  1990年   1318篇
  1989年   1184篇
  1988年   1172篇
  1987年   1137篇
  1986年   1190篇
  1985年   1226篇
  1984年   992篇
  1983年   861篇
  1979年   1012篇
  1978年   771篇
  1976年   700篇
  1975年   903篇
  1974年   1013篇
  1973年   1003篇
  1972年   861篇
  1971年   805篇
  1970年   736篇
  1969年   766篇
  1968年   921篇
  1967年   861篇
  1966年   825篇
排序方式: 共有10000条查询结果,搜索用时 31 毫秒
21.
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   
22.
23.
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   
24.
25.
This study examined individuals' tendencies to migrate from one organization to another (i.e., the propensity to switch employers). Previous researchers have suggested that switching organizations throughout the career span may be partially heritable and therefore related to individual differences in personality traits. If personality traits are indeed related to a tendency to turnover from organizations, this suggests that current procedures for calculating utility may be inaccurate. Using a database of 1081 individuals who have been in the workforce for several years, results indicated that personality traits measured by the Occupational Personality Questionnaire (non‐ipsative; OPQn) were modestly related to organization switching (i.e., repeated moves from organization to organization). We found that higher scores on extraversion, openness to experience, and conscientiousness‐related traits were modestly correlated with more frequent organization switching. However, we demonstrate that these modest relationships can produce large inaccuracies in utility estimates.  相似文献   
26.
27.
28.
29.
30.
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