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   2528篇
  免费   139篇
  国内免费   4篇
  2671篇
  2023年   22篇
  2022年   25篇
  2021年   31篇
  2020年   41篇
  2019年   67篇
  2018年   95篇
  2017年   90篇
  2016年   105篇
  2015年   69篇
  2014年   64篇
  2013年   290篇
  2012年   130篇
  2011年   103篇
  2010年   89篇
  2009年   76篇
  2008年   93篇
  2007年   114篇
  2006年   105篇
  2005年   88篇
  2004年   86篇
  2003年   93篇
  2002年   72篇
  2001年   45篇
  2000年   42篇
  1999年   33篇
  1998年   34篇
  1997年   28篇
  1996年   24篇
  1995年   22篇
  1994年   18篇
  1993年   17篇
  1992年   23篇
  1991年   17篇
  1990年   18篇
  1989年   17篇
  1988年   21篇
  1987年   18篇
  1985年   26篇
  1984年   25篇
  1982年   25篇
  1981年   15篇
  1980年   25篇
  1979年   22篇
  1978年   17篇
  1977年   14篇
  1976年   18篇
  1975年   19篇
  1974年   15篇
  1973年   14篇
  1970年   11篇
排序方式: 共有2671条查询结果,搜索用时 15 毫秒
991.
An analogue methodology was used to present a set of realistic, salient stressors to children in grades 3, 5, and 7. Children (N = 146) viewed eight videotaped vignettes depicting interpersonal and non-interpersonal stressors; these were expected to differentially threaten psychological needs for relatedness, competence and autonomy and provoke different emotional reactions. Analyses showed that scenarios portrayed stressors that were commonly experienced by children and evoked a differentiated profile of appraisals and emotions. When tenets of the motivational theory of stress and coping were tested, scenarios more threatening to needs were more distressing, sadness was linked to relatedness and competence threat appraisals, and fear was a more common reaction to parent stressors that involved dyadic conflict. After accounting for threat appraisals and previous experience of stressors, younger children and girls appraised events as more distressing than older children and boys. Future research could use the analogue procedure to focus on children’s development of regulation and coping with stress.  相似文献   
992.
The development of in vitro fertilisation (IVF) as a treatment for human infertilty was among the most controversial medical achievements of the modern era. In Ireland, the fate and status of supranumary (non-transferred) embryos derived from IVF brings challenges both for clinical practice and public health policy because there is no judicial or legislative framework in place to address the medical, scientific, or ethical uncertainties. Complex legal issues exist regarding informed consent and ownership of embryos, particularly the use of non-transferred embryos if a couple separates or divorces. But since case law is only beginning to emerge from outside Ireland and because legislation on IVF and human embryo status is entirely absent here, this matter is poised to raise contractual, constitutional and property law issues at the highest level. Our analysis examines this medico-legal challenge in an Irish context, and summarises key decisions on this issue rendered from other jurisdictions. The contractual issues raised by the Roche case regarding informed consent and the implications the initial judgment may have for future disputes over embryos are also discussed. Our research also considers a putative Constitutional 'right to procreate' and the implications EU law may have for an Irish case concerning the fate of frozen embryos. Since current Medical Council guidelines are insufficient to ensure appropriate regulation of the advanced reproductive technologies in Ireland, the report of the Commission on Assisted Human Reproduction is most likely to influence embryo custody disputes. Public policy requires the establishment and implementation of a more comprehensive legislative framework within which assisted reproductive medical services are offered.  相似文献   
993.
994.
A pure time preference is a preference for something to occur at one point in time rather than another, merely because of when it occurs in time. Such preferences are widely regarded as paradigm examples of irrational preferences. However, Rosemary Lowry and Martin Peterson have recently argued that, for instance, a pure time preference to go to the opera tonight rather than next month may be rationally permissible, even if the amounts of intrinsic value realized in both cases are identical. In this reply, we argue that Lowry and Peterson's argument is unsuccessful.  相似文献   
995.
996.
Phenomenology and the Cognitive Sciences - Research in phenomenology has benefitted from using exceptional cases from pathology and expertise. But exactly how are we to generate and apply knowledge...  相似文献   
997.
998.
999.
Depressed mood, frequency of alcohol use, and their combination were examined to see if they differentiated nonsuicidal adolescents from those with suicidal ideation and adolescents with suicidal ideation from those who have made a suicide attempt. Hierarchical logistic regressions indicated that frequency of alcohol use did not differentiate nonsuicidal adolescents from those with current suicidal ideation, but severity of depressed mood did so. In contrast, alcohol use was a significant differentiating factor between adolescents who had attempted suicide compared to those with suicidal ideation only, with severity of depressed mood not being significant. However, there was also a significant interaction effect such that for adolescents with suicidal ideation and low levels of depression, increased frequency of alcohol use was associated with increased odds of a suicide attempt. These findings suggest that alcohol use may hasten the transition from suicidal ideation to suicide attempt in adolescents with low levels of depressed mood.  相似文献   
1000.
In this reply to K. E. Freedland's (see record 2004-13299-002) comments on R. J. Contrada et al. (see record 2004-13299-001), it is shown that the statistical issues he raised, and his preferred interpretation of the findings, were adequately addressed in the original article. It is argued that methodological limitations also were fully characterized and do not differ in kind from those of biomedical studies. Other issues discussed include the merits of focusing on distal versus proximal causation, plausibility of explanatory mechanisms for health effects of religious involvement, and potential practical applications that do not require manipulation of religious involvement. The article is concluded by commenting on subtle aspects of discourse that may unnecessarily polarize discussions of possible physical health effects of religious involvement.  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