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   30908篇
  免费   749篇
  国内免费   11篇
  2020年   206篇
  2019年   213篇
  2018年   1734篇
  2017年   1618篇
  2016年   1262篇
  2015年   258篇
  2014年   304篇
  2013年   1645篇
  2012年   842篇
  2011年   1682篇
  2010年   1467篇
  2009年   960篇
  2008年   1304篇
  2007年   1569篇
  2006年   503篇
  2005年   538篇
  2004年   500篇
  2003年   434篇
  2002年   476篇
  2001年   736篇
  2000年   766篇
  1999年   556篇
  1998年   261篇
  1997年   220篇
  1992年   449篇
  1991年   406篇
  1990年   446篇
  1989年   414篇
  1988年   396篇
  1987年   398篇
  1986年   405篇
  1985年   422篇
  1984年   333篇
  1983年   299篇
  1982年   238篇
  1981年   212篇
  1979年   386篇
  1978年   278篇
  1977年   251篇
  1976年   223篇
  1975年   341篇
  1974年   373篇
  1973年   352篇
  1972年   329篇
  1971年   287篇
  1970年   258篇
  1969年   321篇
  1968年   359篇
  1967年   320篇
  1966年   324篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
1.
2.
3.
Evaluated the effect of varied physician affect on subject recall, anxiety, and perceptions in a simulated tense and ambiguous medical situation. Forty women at risk for breast cancer viewed videotapes of an oncologist presenting--with either worried or nonworried affect--mammogram results. Although the mammogram results and the oncologist were the same in both presentation, analyses indicated that, compared to the women receiving the results from a nonworried physician, the women receiving the results from a worried physician recalled significantly less information, perceived the clinical situation as significantly more severe, reported significantly higher levels of state anxiety, and had significantly higher pulse rates. These results suggest that physician affect plays a critical role in patient reaction to medical information. Implications for compliance research, patient satisfaction, and physician training are discussed.  相似文献   
4.
OBJECTIVE: To test a theoretical model of how ethnic pride and self-control are related to risk and protective factors. DESIGN: A community sample of 670 African American youth (mean age = 11.2 years) were interviewed in households. MAIN OUTCOME MEASURES: Measures of cigarette smoking, alcohol use, and sexual behavior (lifetime to past month). RESULTS: Structural modeling analyses indicated parenting was related to self-control and self-esteem, and racial socialization was related to ethnic pride. Self-control and self-esteem variables were related to levels of deviance-prone attitudes and to perceptions of engagers in, or abstainers from, substance use and sexual behavior. The proximal factors (behavioral willingness, resistance efficacy, and peer behavior) had substantial relations to the criterion variables. Participant gender and parental education also had several paths in the model. Results were generally similar for the 2 outcome behaviors. CONCLUSIONS: In this population, self-esteem and self-control are related to parenting approaches and have pathways to attitudes and social perceptions that are significant factors for predisposing to, or protecting against, early involvement in substance use and sexual behavior.  相似文献   
5.
6.
7.
8.
9.
Subjects in five experiments read nine-digit memory lists from a cathode ray tube for immediate recall. Reading aloud always produced a localized and reliable advantage for the last item, compared to reading silently. Two experiments on whispered and mouthed lists, with or without simultaneous broadband noise, falsified expectations derived from the theory of precategorical acoustic storage. Three additional experiments showed no enhancement of recency in the silent conditions when the digits were drawn or spelled gradually on the screen, a result that is inconsistent with the changing-state hypothesis. The classic auditory-visual modality effect is large and reliable, but still poorly understood.  相似文献   
10.
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