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   7211篇
  免费   309篇
  国内免费   4篇
  2021年   88篇
  2020年   130篇
  2019年   118篇
  2018年   184篇
  2017年   168篇
  2016年   215篇
  2015年   158篇
  2014年   195篇
  2013年   701篇
  2012年   344篇
  2011年   342篇
  2010年   221篇
  2009年   204篇
  2008年   301篇
  2007年   310篇
  2006年   261篇
  2005年   272篇
  2004年   260篇
  2003年   238篇
  2002年   252篇
  2001年   128篇
  2000年   86篇
  1999年   121篇
  1998年   105篇
  1997年   105篇
  1996年   87篇
  1995年   79篇
  1994年   74篇
  1993年   80篇
  1992年   91篇
  1991年   85篇
  1990年   69篇
  1989年   51篇
  1988年   52篇
  1987年   58篇
  1986年   62篇
  1985年   74篇
  1984年   68篇
  1983年   73篇
  1982年   66篇
  1981年   75篇
  1980年   69篇
  1979年   63篇
  1978年   68篇
  1977年   71篇
  1976年   64篇
  1975年   54篇
  1974年   61篇
  1968年   41篇
  1966年   42篇
排序方式: 共有7524条查询结果,搜索用时 15 毫秒
871.
The behavioral and public health sciences both have a long and rich history supporting basic, translational, and applied research aimed at improving human lives and reducing human suffering. Through the complementary expertise of these disciplines, investigators have contributed to significant, worldwide improvements in mental and physical health. Further gains can be achieved through collaborative research among scientists in these 2 fields. Unfortunately, there are a number of barriers to such collaboration originating in different intellectual traditions, research methods, and the structure and values of academia. We identify these barriers and potential strategies for overcoming them. Several areas for future collaborative research appear promising, especially comorbid mental and physical disorders, adherence to interventions, stigma, and emotional processes. Theory-guided preventive interventions may represent especially fertile areas of collaborative effort.  相似文献   
872.
The representations of the sexuality of older persons in American society are neither flattering nor accurate. Often what is presented is filled with confusion, uncertainty, and contradictions. Sexuality of old people, like sexuality of adolescents, frightens most adults in between. Evidence suggests hope that in popular culture, conventional representations of sexless older people are finally undergoing a change. The popular literature aimed at elderly or midlife audiences increasingly portrays older persons as healthy, vigorous, and not unattractive. Since in the popular mind attractiveness and sexuality are believed to be closely linked, this change signals an increased willingness to credit old people who are aging well (i.e., who look and act young) with being sexually interested and probably active.  相似文献   
873.
The Homework/Quiz/Exam applet is a freely available Java program that can be used to evaluate student performance on line for any content authored by a teacher. It has database connectivity so that student scores are automatically recorded. It allows several different types of questions. Each question can be linked to images and detailed story problems. Three levels of feedback are provided to student responses. It allows teachers to randomize the sequence of questions and to randomize which of several options is the correct answer in multiple-choice questions. The creation and editing of questions involves menu selections, buttonpresses, and the typing of content; no programming knowledge is required. The code is open source in order to encourage modifications that will meet individual pedagogical needs.  相似文献   
874.
The tripartite model of Clark and Watson (1981) suggests that the oft-observed covariation between anxiety and depression can best be understood by examining three related yet distinct constructs: negative affectivity, positive affectivity, and elevated physiological arousal. In the present study, 510 boys and girls in the 4th, 7th, and 10th grades completed the Children's Depression Inventory and the Revised Children's Manifest Anxiety Scale. Confirmatory factor analyses were conducted to determine the goodness of fit of single-factor (i.e., negative affectivity), two-factor (i.e., anxiety and depression), and three-factor models (i.e., negative affectivity, positive affectivity, and physiological arousal). Analyses were conducted by examining each of the models in the whole sample first and then separately for boys and girls and for fourth, seventh, and tenth grade youths. Results failed to support the tripartite theory; rather, the findings supported a two-factor model in all cases. These factors represented the general constructs of anxiety and depression, and these factors remained significantly interrelated. Consistent with previous findings, the strength of these relations was stronger for boys than girls and for children than adolescents.  相似文献   
875.
This paper describes the development and implementation of a self-management program designed to address noncompliance in adolescents with renal transplants. Transplantation provides the best treatment alternative for End-Stage Renal Disease (ESRD), but is a procedure that subsequently demands recipients follow a life-long medication regimen. Nonadherance to medical therapy is a serious problem for adolescents; it is one of the most common causes of chronic graft rejection in this population. To improve compliance rates for this population, a self-management program was designed: (1) to provide social support; (2) to review information about medications and transplant management; and (3) to both teach and provide transplantation patients the opportunity to practice self-management skills. Details about the program, including recruitment issues and session content, are provided. Evaluations by participants indicated that the program was effective in creating a supportive environment for both patients and their parents, and in addressing health-related concerns.  相似文献   
876.
There has been little theorizing or empirical research on satisfaction among African American women at midlife. This study addresses this gap by examining predictors of satisfaction in 3 cohorts (N = 202) of midlife college-educated African American women. Specifically, 3 domains of satisfaction were examined: overall life satisfaction, personal satisfaction, and work satisfaction. Results revealed that the women were highly satisfied with their work situation, their personal life, and generally with how their life had turned out so far. Overall life satisfaction was predicted by the women's perceptions of personal control, role quality, household burden, and their cohort status. Work satisfaction was best predicted by the women's sense of personal control and role quality. Lastly, household burden and physical well-being emerged as significant predictors of personal satisfaction. Implications of the findings and recommendations for future research are offered.  相似文献   
877.
This paper explores the types and strength of transnational ties between Ghanaian immigrants in Canada and their country of origin. The study finds that Ghanaians maintain various types of ties to Ghana including communication by telephone, repeat migration, cultural activities, and investments, especially in home ownership. The desire for home ownership in Ghana is related to the immigrants' intentions to return there permanently in the future. The immigrants also maintain collective ties to the homeland through a network of ethnic associations in Canada. These associations provide financial support for local economic development in Ghana. They also provide an organizational structure through which the immigrants seek to address their political needs in Ghana.  相似文献   
878.
This essay examines the role of the University of Bridgeport's Faculty Council in relation to the faculty union. The Faculty Council is a governing body composed of elected faculty representatives from different schools and departments within the university. Faculty Council leaders facilitated the certification of AAUP as the faculty's bargaining agent in 1973 and, under the author's leadership, the faculty petitioned the National Labor Relations Board to decertify the union in 1991. The author participated on the picket line during the 1975, 1978 and 1987 faculty strikes, but crossed the picket line during the 1990 strike.  相似文献   
879.
The causes of and contributors to negative emotions have been areas of interest in psychology for decades. Recent work has shown a variety of negative emotions, including anger and depression, to be related. The present study investigated the effects of power, attributional style, and gender on anger and depression using a series of narrative mood inductions presented to 120 undergraduates. Results indicated that participants in the external attribution and low power conditions demonstrated significantly higher levels of postinduction anger than those in other conditions. In addition, the influence of internal attributions on postinduction depression scores approached significance. The effectiveness of the study's mood induction methodology is discussed and suggestions are made for future research.  相似文献   
880.
This contribution provides recommendations and guidelines for the development of a Web site for psychotherapists, whereby the conception of the presentation predominates. In comparison, practical realisation and care of the site require only a relatively small effort. The way to a Web appearance is presented in seven steps. In addition, the way to deal with (unwanted) e-mail will be considered. The article is centered on clarity and practice orientation.  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