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   4104篇
  免费   73篇
  4177篇
  2024年   24篇
  2023年   51篇
  2022年   36篇
  2021年   48篇
  2020年   96篇
  2019年   137篇
  2018年   142篇
  2017年   165篇
  2016年   162篇
  2015年   115篇
  2014年   150篇
  2013年   513篇
  2012年   197篇
  2011年   228篇
  2010年   126篇
  2009年   147篇
  2008年   196篇
  2007年   138篇
  2006年   155篇
  2005年   133篇
  2004年   145篇
  2003年   128篇
  2002年   111篇
  2001年   52篇
  2000年   52篇
  1999年   29篇
  1998年   41篇
  1997年   41篇
  1996年   37篇
  1995年   26篇
  1994年   24篇
  1993年   15篇
  1992年   27篇
  1991年   24篇
  1990年   23篇
  1989年   23篇
  1988年   24篇
  1987年   31篇
  1986年   30篇
  1985年   24篇
  1984年   34篇
  1983年   38篇
  1982年   23篇
  1981年   18篇
  1980年   30篇
  1979年   21篇
  1978年   18篇
  1977年   22篇
  1976年   19篇
  1974年   11篇
排序方式: 共有4177条查询结果,搜索用时 0 毫秒
71.
There are numerous challenges posed to Roman Catholic healthcare institutions by recent developments in health care delivery.Some are practical, involving the acceptable limits of accommodationto and collaboration with secular networks of health care delivery.Others, quite often implicated in the first set, are explicitlytheological. What does it mean to be a distinctively Roman Catholichealth care institution? What are the nature and the scope ofRoman Catholic institutional identity? More broadly, what isthe moral relevance of themes in Roman Catholic social teachingto the provision of health care? This issue of Christian Bioethicsaddresses these questions with a spirited exchange among itsauthors. They offer noticeably different perspectives on thegeneral cogency of Roman Catholic social teaching and differentstrategic recommendations for Roman Catholic institutions tomaintain, or recover, their distinctive presence in health caredelivery.  相似文献   
72.
73.
74.
    
Retaining pregnant women and mothers is a prevalent challenge for companies in the United States. In this paper, we highlight the importance of favorable maternity benefits. Specifically, we argue that maternity benefits can signal how pregnant workers are treated within the organization, particularly as women compare their own benefits to referent others'. Drawing from identity threat response theory, we propose a conceptual framework that explains the influence of maternity benefit comparisons on perceptions of discrimination and, subsequently, turnover. Upon evaluating two studies using multi-wave survey data and two vignette studies, our results indicate that when women perceive their maternity benefits to be less favorable than referent others' benefits, they perceive more pregnancy discrimination. In turn, perceptions of pregnancy discrimination influence their subsequent turnover decisions. Consistent with identity threat response theory, our results also suggest that perceived supervisor support is a significant moderator, weakening the impact of maternity benefit comparisons on perceptions of pregnancy discrimination.  相似文献   
75.
ABSTRACT

Moving in time together has been shown to cultivate pro-social effects in co-actors, such as cooperation and helping. But less is known about who these effects apply to – whether they are restricted only to co-actors, or whether they generalize to those not involved in the coordination. One difference between past work finding generalized vs. restricted effects is whether these “outsiders” were present for the coordination or not. The present study explores whether the pro-social effects of coordination are seen towards observers as well as co-actors, and whether the absence or presence of observers during the coordination is a determining factor. Results show that greater cooperation following coordination is only seen amongst co- actors, regardless of whether the observers were present during the task or not. Findings are discussed in the context of the literature and alternative explanations for research showing generalized effects are suggested.  相似文献   
76.
    
Previous work from our laboratory showed that intermittently re-exposing rats to reinforcement for lever pressing in a training (A) context, while eliminating lever pressing in a second (B) context, increased ABA renewal of lever pressing relative to rats that experienced only Context B during response elimination. In the current study, we replicated these procedures while assessing renewal in the presence of a novel context (i.e., ABC renewal). Unlike the findings described above, renewal was reduced in the group that experienced re-exposure to Context A during lever-press elimination relative to rats that experienced only Context B. These findings suggest that alternating between contexts associated with reinforcement and extinction during treatment reduces the probability that organisms will respond in novel contexts. These outcomes may be the result of discrimination and/or generalization processes. Moreover, this training procedure may offer a potential mitigation strategy for ABC renewal.  相似文献   
77.
78.
    
G.E.M. Anscombe argued that we should dispense with deontic concepts when doing ethics, if it is psychologically possible to do so. In response, I contend that deontic concepts are constitutive of the common moral experience of guilt. This has two consequences for Anscombe's position. First, seeing that guilt is a deontic emotion, we should recognize that Anscombe's qualification on her thesis applies: psychologically, we need deontology to understand our obligations and hence whether our guilt is warranted. Second, the fact that guilt is a deontic moral emotion debunks Anscombe's claim that deontic concepts are a relic of the Western, religious past: guilt feelings–hence the idea of moral duty as well–can be found in cultures without an ethics of divine command. Modern moral philosophers' interest in oughts and obligations is not an academic hobbyhorse, but a vital concern arising out of a primeval human emotion.  相似文献   
79.
This study examined adolescents’ cyberbullying, cyber aggression, and cyber victimization from an evolutionary perspective, extending previous research showing that traditional forms of bullying, aggression, and victimization are associated with reproductively relevant outcomes. Consistent with hypotheses based on theory and research linking bullying and aggression to intrasexual competition for mates, results indicated that cyber victimization was positively associated with a number of dating and sexual partners. Findings for cyber aggression were more complex, depending on the degree of cyber victimization experienced by the perpetrator, and the balance of power between the perpetrator and victim. Specifically, nonbullying cyber aggression by perpetrators with equal or less power than the victim had stronger positive relations with the number of dating or sexual partners when perpetrators experienced a high level of cyber victimhood. In contrast, cyberbullying by perpetrators with more power than the victim was negatively associated with the number of dating partners when the perpetrators’ exposure to cyber victimization was low. Although cyber aggression and cyber victimization are new forms of aggression that involve the use of modern electronic devices, the results of this study demonstrate the usefulness of viewing this behavior from an evolutionary perspective and show that adolescents are likely to use cyber aggression against rivals in the context of intrasexual competition for mates.  相似文献   
80.
A robust research literature links parental spanking with negative behavioral outcomes for children, however, it remains unclear whether conditions in the community may moderate the associations between spanking and behavior problems in early childhood. In the current study, we examined whether community violence exposure moderated the associations of maternal spanking with externalizing and internalizing behavior problems of young children. The sample used in this study was urban families and their children ages 3–5 (n = 2,472). We used fixed effects regression models, which yield stronger statistical control for baseline behavior problems, selection bias, and omitted variables bias. Mother's spanking was associated with elevated levels of both externalizing (β = .037, p < .001) and internalizing (β = .016, p < .001) behavior problems. Community violence exposure also predicted higher levels of externalizing (β = .071, p < .01) and internalizing (β = .043, p < .05) behavior problems. Community violence exposure did not moderate the associations between maternal spanking and behavior problems. Professionals working with families should promote the use of nonphysical disciplinary practices, regardless of the level of violence and crime in the community in which the family resides.  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