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   256篇
  免费   8篇
  2019年   5篇
  2018年   5篇
  2016年   10篇
  2015年   6篇
  2014年   7篇
  2013年   33篇
  2012年   4篇
  2011年   6篇
  2010年   4篇
  2009年   6篇
  2008年   6篇
  2007年   9篇
  2006年   3篇
  2005年   8篇
  2004年   13篇
  2003年   9篇
  2002年   7篇
  2001年   7篇
  2000年   2篇
  1999年   1篇
  1998年   4篇
  1997年   4篇
  1996年   7篇
  1995年   1篇
  1994年   1篇
  1993年   4篇
  1992年   3篇
  1991年   4篇
  1990年   8篇
  1989年   3篇
  1988年   4篇
  1987年   1篇
  1986年   6篇
  1985年   3篇
  1984年   1篇
  1983年   2篇
  1982年   11篇
  1981年   4篇
  1980年   5篇
  1979年   8篇
  1978年   1篇
  1977年   6篇
  1976年   3篇
  1975年   6篇
  1974年   3篇
  1973年   1篇
  1972年   1篇
  1971年   2篇
  1966年   2篇
  1964年   1篇
排序方式: 共有264条查询结果,搜索用时 15 毫秒
191.
Following 1 day of cohabitation with a male, female Siamese fighting fish showed heightened escape from male conspecifics (enclosed behind glass). Escape from males was general in that no particular male stimulus was required to provoke female escape. However, female conspecifics remained relatively attractive following exposure to a male. Tactile stimulation of females by males (biting, perhaps) plays some role and may be required in sensitizing females' escape from males. © 1996 Wiley-Liss, Inc.  相似文献   
192.
We investigated the psychometric validity and reliability of the Suicide Status Form‐II (SSF‐II) developed by Jobes, Jacoby, Cimbolic, and Hustead (1997) . Participants were 149 psychiatric inpatients (108 suicidal; 41 nonsuicidal) at the Mayo Clinic. Each participant completed assessment measures within 24 hours of admission and 48–72 hours later. Factor analyses of the SSF core assessment produced a robust two‐factor solution reflecting chronic and acute response styles. The SSF core assessment had good to excellent convergent and criterion validity; pre‐post SSF ratings also demonstrated moderate test‐retest reliability. The results replicated previous research and show that the SSF‐II is psychometrically sound with a high‐risk suicidal inpatient sample.  相似文献   
193.
194.
Pearson  Phyllis 《Philosophical Studies》2021,178(4):1285-1299
Philosophical Studies - Is it ever aesthetically permissible to engage in acts of cultural appropriation? This paper shows how recent work on aesthetic normativity can help answer this question....  相似文献   
195.

Background

This study aimed to characterize, for the first time, 18 month longitudinal changes in both functional activation and functional connectivity during working memory in premanifest Huntington’s disease (pre-HD) and symptomatic HD (symp-HD).

Methods

Functional magnetic resonance imaging (fMRI) was used to investigate longitudinal changes in neuronal activity during working memory performance via an N-BACK task (0-BACK and 1-BACK) in 27 pre-HD, 17 symp-HD, and 23 control participants. Whole-brain analysis of activation and region-of-interest analysis of functional connectivity was applied to longitudinal fMRI data collected at baseline and 18 months follow-up.

Results

Compared with controls, the pre-HD group showed significantly increased activation longitudinally during 1-BACK versus 0-BACK in the lateral and medial prefrontal, anterior cingulate, primary motor, and temporal areas cortically, and caudate and putamen subcortically. Pre-HD far from onset, compared with controls, showed further longitudinal increases in the right and left dorsolateral prefrontal cortex (DLPFC). Longitudinal increased activation in anterior cingulate and medial primary motor areas were associated with disease burden in the pre-HD group. Moreover, in pre-HD increased activation over time in primary motor and putamen regions were associated with average response time during 1-BACK performance. During 1-BACK, functional connectivity between the right DLPFC and posterior parietal, anterior cingulate, and caudate was significantly reduced over 18 months only in the pre-HD group.

Conclusions

Longitudinal reductions in connectivity over 18 months may represent an early signature of cortico-cortical and cortico-striatal functional disconnectivity in pre-HD, whereas the concomitant increased cortical and subcortical activation may reflect a compensatory response to the demands for cognitive resources required during task performance. Our findings demonstrate that functional imaging modalities have the potential to serve as sensitive methods for the assessment of cortical and subcortical responses to future treatment measures.  相似文献   
196.
Phyllis Tharenou 《Sex roles》2013,68(3-4):198-206
Lips (2012) critiques the literature, predominantly from the United States, to assess how well human capital theory explains the gender pay gap. Her analysis shows that human capital inputs are an imperfect explanation for the gap and that social psychological influences also provide key explanations. I comment on Lips’s paper using literature from the United States and other English-speaking highly developed countries and, to a lesser extent, from European countries. I elaborate and extend her position, promoting the argument for the effect of social influences and for their interactive and incremental effects. I place the phenomenon of the gender pay gap into a societal context. I borrow from the literature for the effect of gender discrimination on women’s advancement in management to discuss explanatory influences. I extend the inference that the gender pay gap supports and maintains the lesser status of women in society and that it helps to preserve the status quo with respect to gender roles. To explain the gender pay gap, I propose that the development of an integrated theoretical framework is needed. The framework would combine the direct and interactive influences of human capital and social psychological inputs, in the context of a cumulative, incremental pattern that occurs over a person’s working life.  相似文献   
197.
More and more states have moved to legalize various forms of gambling as a viable way to raise substantial revenues. And while some have considered adding sports betting to their menu of games, Nevada continues to be the only state where placing a bet on sports events is legal. This is both puzzling and ironic considering the popularity of gambling and the prominence of sports. Despite the lack of concrete knowledge about illegal sports betting, two justifications for keeping it illegal have dominated the public debate. The first has to do with whether legal sports betting could successfully compete with illegal operations were it to be legalized and the second has to do with a purported link between gambling on sports and organized crime. This paper focuses on the second line of argument and examines the social, organizational, and occupational features of bookmaking. If bookmakers are conduits for organized crime, as is claimed, there should be evidence of this in the day-to-day activities of bookmaking and in the career trajectories of bookmakers. The analysis is based upon interviews with 47 sports bookmakers working in the Rust Belt region. Drawing upon what sports bookies themselves have to say about their experiences in the business and their career trajectories, there appears to be little merit to the organized crime link argument. The analysis suggests that unlike other types of deviance, the social organization of bookmaking insulates bookies from the more typical consequences associated with frequent and prolonged deviant activity, for example, getting arrested, being prosecuted, serving time in prison, and forced association with other criminals. In fact, the findings suggest that bookies are more like entrepreneurs than criminals. While a single study cannot resolve the normative question about whether sports bookmaking should be criminalized, the findings do show that the social construction of bookmaking and bookmakers found in the public debate and popular culture does not reflect the reality of sports bookmaking.  相似文献   
198.
Abstract

After briefly describing the purpose, structure, and functions of a typical family planning center, the paper suggests and gives support for a more relationship-centered service delivery system. The major thesis of the paper is that these centers should adopt a system which recognizes and promotes intimate human relationships, and that marriage and family counselors would be highly valuable resources in such a system. The paper stresses the importance of attending to the myriad relationship issues involved in the entire process of enabling individual couples to more effectively plan and control their own fertility. Several ways in which the marriage and family counselor can work with and within the family planning center are outlined.  相似文献   
199.
The Greeks and the Romans believed that commanders ought to exercise their foresight to preclude risks in combat. They also tried to inculcate and to preserve order in their military systems by the use of initiatory mechanisms, repetitive drill, and replication of the military order in social, economic, and spatial arrangements. In spite of their efforts to minimize entropy within their military units, these systems sometimes underwent chaotic transformations during set‐piece engagements on the battlefield. These set‐piece battles which followed a simple, formulaic pattern provide the data for a case‐study in the behavior of military systems within a relatively simple set of constraints. The results suggest that command functions can have little influence once a system is actively engaged with the enemy and that small effects can drive even simple military systems irreversibly over thresholds into chaos. They illustrate the dangers in any analysis of military phenomena which assumes linear rather than chaotic change. They also suggest that prediction, let alone control, of the course of an engagement is considerably more difficult than is often assumed. It is even difficult to label known outcomes as victories or losses, since the same result may appear differently to two observers occupying different vantage points. Military analysts should take into account values held by society at large.  相似文献   
200.
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