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   3103篇
  免费   92篇
  国内免费   1篇
管理学   426篇
民族学   9篇
人口学   251篇
丛书文集   17篇
理论方法论   381篇
综合类   39篇
社会学   1301篇
统计学   772篇
  2021年   16篇
  2020年   48篇
  2019年   68篇
  2018年   91篇
  2017年   105篇
  2016年   62篇
  2015年   71篇
  2014年   90篇
  2013年   594篇
  2012年   123篇
  2011年   99篇
  2010年   79篇
  2009年   62篇
  2008年   85篇
  2007年   79篇
  2006年   64篇
  2005年   56篇
  2004年   42篇
  2003年   28篇
  2002年   48篇
  2001年   58篇
  2000年   55篇
  1999年   46篇
  1998年   48篇
  1997年   47篇
  1996年   31篇
  1995年   43篇
  1994年   45篇
  1993年   42篇
  1992年   58篇
  1991年   53篇
  1990年   42篇
  1989年   41篇
  1988年   55篇
  1987年   31篇
  1986年   29篇
  1985年   45篇
  1984年   41篇
  1983年   50篇
  1982年   31篇
  1981年   32篇
  1980年   31篇
  1979年   29篇
  1978年   47篇
  1977年   26篇
  1976年   28篇
  1975年   30篇
  1974年   20篇
  1972年   20篇
  1971年   16篇
排序方式: 共有3196条查询结果,搜索用时 15 毫秒
951.
The present study investigated temporal associations between putative emotion regulation strategies and negative affect in 20‐month‐old toddlers. Toddlers’ parent‐focused, self‐distraction, and toy‐focused strategies, as well as negative affect, were rated on a second‐by‐second basis during laboratory parent–toddler interactions. Longitudinal mixed‐effects models were conducted to determine the degree to which behavioral strategy use predicts subsequent negative affect and negative affect predicts subsequent strategy use. Results with mother–toddler and father–toddler dyads indicated that parent‐focused strategies with an unresponsive parent were followed by increases in negative affect, whereas toy‐focused strategies were followed by decreases in negative affect. Results also indicated that toddler negative affect serves to regulate behavioral strategy use within both parent contexts.  相似文献   
952.
The development of effective leaders and leadership behavior is a prominent concern in organizations of all types. We review the theoretical and empirical literature on leader and leadership development published over the past 25 years, primarily focusing on research published in The Leadership Quarterly. Compared to the relatively long history of leadership research and theory, the systematic study of leadership development (broadly defined to also include leader development) has a moderately short history. We examine intrapersonal and interpersonal issues related to the phenomena that develop during the pursuit of effective leadership, describe how development emerges with an emphasis on multi-source or 360-degree feedback processes, review longitudinal studies of leadership development, and investigate methodological and analytical issues in leader and leadership development research. Future research directions to motivate and guide the study of leader and leadership development are also discussed.  相似文献   
953.
Three hundred college students were presented with vignettes describing an ill person; the vignettes were identical except the illness was identified as either AIDS or leukemia and the individual was described as either homosexual or heterosexual. After reading one vignette, each subject completed a set of measures sensitive to interpersonal evaluation, prejudicial attitudes, and willingness to interact casually with the portrayed individual. The findings indicate the presence of highly stigmatizing attitudes towards AIDS patients and suggest that the public views AIDS patients and gay persons with similar attitudinal prejudice. The need for greater attention to AIDS by social and behavioral researchers is discussed.  相似文献   
954.
The degree of aggregation of lettuce plants infected by aster yellows phytoplasma (AYP) was investigated in 12 fields from three experiments. Position of diseased and healthy plants was mapped in a 6–9×12-m section of each field; for most analyses, fields were divided into 10-plant quadrats. Mean disease incidence (p) ranged from 0.01 to 0.30. The frequency of diseased plants was described by the beta-binomial distribution, with an index of aggregation (θ) ranging from 0 to 0.17, positively correlated withp, and generally increasing over time within a field. Distance-class analysis revealed a core-cluster size of only a few plants. However, spatial autocorrelations ofp between quadrats were not significant, indicating that the scale of spatial pattern was small, generally less than 10 plants. An overall measure of aggregation was given by the slope parameter of the binary form of the power law, in which the log of the calculated variance is regressed on the log of the theoretical variance for a binomial distribution. The slope was 1.18 and significantly different from 1. Results for this “simple-interest” disease are interpreted in relation to the persistent transmission of AYP by its aster leafhopper vector.  相似文献   
955.
A major concern of workers, even those financially prepared for retirement, is that a small risk of poverty may grow over time. Cross-sectional data showing that older cohorts have higher poverty rates substantiate this concern. Using data from the Retirement History Study, we analyze changes in the hazard of entering poverty as a cohort of elderly couples retire and age and the wives are widowed. The initial fall into poverty among those who were not poor before the husband retired is more closely linked to the event of retirement or widowhood than to the slowly eroding household income over the period of retirement and widowhood. The death of her retired husband puts a wife in economic jeopardy whether this shock occurs one year after his retirement or some years later.  相似文献   
956.
In the extensive litigation over school board liability for segregated schools, a great deal of attention has been focused on changes in school attendance areas. Evidence presented in several trials suggested that school boards have gerrymandered boundaries to keep some schools black and others white. Even though both district and appeal courts have found violations in attendance zone changes, there has been little other than anecodotal evidence to support these findings. In many cases the areas with the most changes in attendance boundaries are also the areas of rapid racial transition, but correlation does not necessarily mean causation. This case study examines boundary changes in Topeka and suggests that racial change in schools is more directly attributable to demographic shifts than to attendance boundary changes.  相似文献   
957.
This article puts together all available data on contraceptive prevalence and effectiveness from 1968-83 in an attempt to assess the Philippine family planning program's performance in reducing fertility. 3 indicators of contraceptive effectiveness are discussed -- Pearl pregnancy rates, 12-month continuation rates, and effective protection level. Findings on factors associated with contraceptive prevalence are presented and discussed, with special emphasis on the effects of the Outreach project variables. The argument is that popualtion programs can influence demographic behavior, but the extent of this influence largely depends on the quality of program design and implementation.  相似文献   
958.
In comparison to a large body of literature about battered heterosexual women and a growing body about battered lesbians, this is one of the first published studies that investigates the experiences of battered gay and bisexual men. Results indicated that these men suffered patterns, forms, and frequencies of physical, emotional, and sexual abuse similar to what has been documented by research on battered heterosexual and lesbian women. Likewise, the most commonly reported reasons for staying--namely, hope for change and love for partner--appear to be universal to the experience of being battered. Unlike battered heterosexual women, respondents in this study were not likely to report that being financially trapped was a major reason why they had remained. HIV-status, however, appears to significantly influence their decision to remain. Moreover, lack of knowledge about domestic violence and the lack of availability of appropriate resources play a significant role in same-gender domestic violence victims' decisions to remain. Like battered lesbians, battered gay men infrequently sought assistance from battered women's services and perceived these services as not helpful. By contrast, individual counselors and agencies who provided individual counselors were rated as quite helpful.  相似文献   
959.
Abstract Neo-Malthusian organisations for spreading birth control propaganda were created in many West European countries in the 1870s and '80s. But the birth control movement proper, with its provision of clinics and other means of supplying advice on contraception, began much later-generally after World War I and largely on a welfare basis, divorced from Malthusianism. Legal and other difficulties impeded progress and conditioned the nature of the movement. Since World War II, however, the relevance of birth control has come increasingly to be recognized and the movement has expanded markedly. In some countries - especially in France, West Germany and Italy - there are still legal obstacles, though ways have been found of avoiding them. But even in other countries the direct impact of birth control clinics is far smaller than might have been expected and married couples still obtain their information on contraception from other sources. In recent years the various national movements have shown a greater interest in the evaluation of their activities. As a result, the near future may see substantial changes in their structure and in the approach to their potential clientèle.  相似文献   
960.
What do searchers find when they look for literature on homosexuality? This question has profound implications for older as well as younger gays in their coming out, as well as in their subsequent identity development. Library records provide credible data to answer the question, since they represent relatively free sources of information, unlike data from bookstores, publishers, and some World Wide Web sites. The records of WorldCat, the world's largest union database of library records, comprise over 30 million records listed in the Online Computer Library Center. For the purposes of the study, 18,757 records listed under "Homosexuality," "Gay Men," and "Gays" were downloaded; records for "Lesbian" and "Lesbians" were not examined. Findings of the study suggest that while there has indeed been considerable growth in terms of the quantity of gay literature produced since 1969, such gains may be offset by the deteriorating quality of cataloging copy, which makes the experience of browsing records a discouraging and confusing one.  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