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   26214篇
  免费   268篇
  国内免费   2篇
  2022年   49篇
  2021年   67篇
  2020年   102篇
  2019年   140篇
  2018年   3602篇
  2017年   2969篇
  2016年   2384篇
  2015年   340篇
  2014年   268篇
  2013年   858篇
  2012年   858篇
  2011年   2667篇
  2010年   2650篇
  2009年   1637篇
  2008年   1921篇
  2007年   2402篇
  2006年   260篇
  2005年   414篇
  2004年   368篇
  2003年   292篇
  2002年   222篇
  2001年   118篇
  2000年   140篇
  1999年   114篇
  1998年   106篇
  1997年   81篇
  1996年   65篇
  1995年   51篇
  1994年   53篇
  1993年   61篇
  1992年   60篇
  1991年   46篇
  1990年   58篇
  1989年   43篇
  1988年   46篇
  1987年   44篇
  1986年   52篇
  1985年   63篇
  1984年   59篇
  1983年   57篇
  1982年   59篇
  1981年   57篇
  1980年   51篇
  1979年   46篇
  1978年   51篇
  1977年   36篇
  1976年   51篇
  1975年   47篇
  1974年   46篇
  1973年   38篇
排序方式: 共有10000条查询结果,搜索用时 265 毫秒
891.
Parental maturity refers to parents’ ability to see their child as an independent adult with limitations and needs, and relate to him/her accordingly. In this study, we had two main aims: (a) develop a measure of parental maturity and test its construct validity in a sample of middle-aged parents with an emerging adult child, and (b) examine how the dimensions of parental maturity varied with a child’s gender and life course transitions (i.e., employment and leaving the parental home). A sample of 343 Portuguese parents (187 mothers and 156 fathers) aged 40–68 participated in this study. Factorial validity of the Parental Maturity Measure was tested using exploratory and confirmatory factor analyses and measurement invariance across mothers and fathers. Results gave support for a two-factor measure—Comprehending (6 items) and Letting Go (4 items)—with an equivalent meaning across parents. Dimensions of parental maturity were associated with differentiated and positive parent–child relationship qualities, but were quite independent of the child’s gender and life course transitions.  相似文献   
892.
This article is the result of an international research between law and ethics scholars from Universities in France and Switzerland, who have been closely collaborating with technical experts on the design and use of information and communication technologies in the fields of human health and security. The interdisciplinary approach is a unique feature and guarantees important new insights in the social, ethical and legal implications of these technologies for the individual and society as a whole. Its aim is to shed light on the tension between secrecy and transparency in the digital era. A special focus is put from the perspectives of psychology, medical ethics and European law on the contradiction between individuals’ motivations for consented processing of personal data and their fears about unknown disclosure, transferal and sharing of personal data via information and communication technologies (named the “privacy paradox”). Potential benefits and harms for the individual and society resulting from the use of computers, mobile phones, the Internet and social media are being discussed. Furthermore, the authors point out the ethical and legal limitations inherent to the processing of personal data in a democratic society governed by the rule of law. Finally, they seek to demonstrate that the impact of information and communication technology use on the individuals’ well-being, the latter being closely correlated with a high level of fundamental rights protection in Europe, is a promising feature of the socalled “e-democracy” as a new way to collectively attribute meaning to large-scale online actions, motivations and ideas.  相似文献   
893.
Behavioral inhibition (BI) is a temperament associated with heightened vigilance and fear of novelty in early childhood, and social reticence and increased risk for anxiety problems later in development. However, not all behaviorally inhibited children develop signs of anxiety. One mechanism that might contribute to the variability in developmental trajectories is the recruitment of cognitive‐control resources. The current study measured N2 activation, an ERP (event‐related potential) associated with cognitive control, and modeled source‐space activation (LORETA; Low Resolution Brain Electromagnetic Tomography) at 7 years of age while children performed a go/no‐go task. Activation was estimated for the entire cortex and then exported for four regions of interest: ventromedial prefrontal cortex (VMPFC), ventrolateral prefrontal cortex (VLPFC), dorsal anterior cingulate cortex (dorsal ACC), and dorsal lateral prefrontal cortex (DLPFC). BI was measured in early childhood (ages 2 and 3 years). Anxiety problems and social reticence were measured at 7 years of age to ascertain stability of temperamental style. Results revealed that BI was associated with increased performance accuracy, longer reaction times, greater (more negative) N2 activation, and higher estimated dorsal ACC and DLPFC activation. Furthermore, early BI was only associated with social reticence at age 7 at higher (more negative) levels of N2 activation or higher estimated dorsal ACC or DLPFC activation. Results are discussed in the context of overcontrolled behavior contributing to social reticence and signs of anxiety in middle childhood.  相似文献   
894.
895.
We have argued that it is rational to have asymmetric attitudes toward prenatal and posthumous non-existence insofar as this asymmetry is a special case of a more general (and arguably rational) asymmetry in our attitudes toward past and future pleasures. Here we respond to an interesting critique of our view by Jens Johansson. We contend that his critique involves a crucial and illicit switch in temporal perspectives in the process of considering modal claims (sending us to other possible worlds).  相似文献   
896.
Obsessive-compulsive disorder (OCD) belongs to a group of disorders with an estimated lifetime prevalence of 2?%, associated with a high socio-economic burden and the risk of chronification. In the latest version of the DSM-5, OCDs were detached from the chapter of anxiety disorders, similar to the ICD-10. Consequently, the fifth revision of the DSM highlights the fact that scientific results so far, like the overactivation of basal-ganglia thalamocortical circuits, basically support a common model for OCDs. Although in the past, OCDs have been ignored as a diagnostic entity, in the DSM-5, the concept of obsessive–compulsive spectrum disorders according to Hollander was partly realized. The present case report outlines an example of a successful therapeutic chain in the treatment of a severe case of OCD with a 90?% reduction of symptoms throughout a calendar-year, emphazising the importance of efficient treatment chains within psychiatric disorders.  相似文献   
897.
The interest to research spirituality in the classroom has been constant over the last decade. However, empirical research into classroom pedagogy and the lived experience of religious education has been scarce. This study describes a small-scale intervention that aimed to promote students’ spiritual reflection in Finnish upper secondary school RE classes by using stimulating tasks. One class (N?=?23) of upper secondary school students (16–18?years of age) participated in the study. Analysis of students’ responses after the silent reflection moments suggested that the tasks were successful in eliciting some level of spiritual reflection for most of the students. In this article, we describe the experiment and the content and nature of this reflection, as well as discuss the advantages and challenges of spiritually sensitive teaching methods in a classroom of heterogeneous worldviews.  相似文献   
898.
899.
Martin  James V. 《Topoi》2022,41(5):987-1002

Annalisa Coliva (Int J Study Skept 10(3–4):346–366, 2020) asks, “Are there mathematical hinges?” I argue here, against Coliva’s own conclusion, that there are. I further claim that this affirmative answer allows a case to be made for taking the concept of a hinge to be a useful and general-purpose tool for studying mathematical practice in its real complexity. Seeing how Wittgenstein can, and why he would, countenance mathematical hinges additionally gives us a deeper understanding of some of his latest thoughts on mathematics. For example, a view of how mathematical hinges relate to Wittgenstein’s well-known river-bed analogy enables us to see how his way of thinking about mathematics can account nicely for a “dynamics of change” within mathematical research—something his philosophy of mathematics has been accused of missing (e.g., by Robert Ackermann (Wittgenstein’s city, The University of Massachusetts Press, Amherst, 1988) and Mark Wilson (Wandering significance: an essay on conceptual behavior, Oxford University Press, Oxford, 2006). Finally, the perspective on mathematical hinges ultimately arrived at will be seen to provide us with illuminating examples of how our conceptual choices and theories can be ungrounded but nevertheless the right ones (in a sense to be explained).

  相似文献   
900.
Infant social withdrawal is a risk factor for non-optimal child development; thus, it is important to identify risk factors associated with withdrawal. In a large community sample (N = 19,017), we investigate whether symptoms of maternal and partner postpartum depression (PPD; measured with the Edinburgh Postnatal Depression Scale) and prematurity are predictors of infant social withdrawal (measured with the Alarm Distress Baby Scale). Withdrawal was assessed at 2–3, 4–7 and 8–12 months postpartum. Linear regressions showed that prematurity predicted higher infant social withdrawal at all time points, and maternal symptoms of PPD were positively associated with withdrawal at 2–3 months. Logistic regressions showed that odds for elevated social withdrawal were increased with elevated levels of maternal symptoms of PPD at 2–3 and 8–12 months. Partner's symptoms of PPD were not associated with withdrawal. Future studies should investigate how PPD symptoms and prematurity may impact the individual development of social withdrawal.  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