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   20506篇
  免费   8篇
  2021年   2篇
  2020年   2篇
  2019年   5篇
  2018年   3492篇
  2017年   2812篇
  2016年   2244篇
  2015年   187篇
  2014年   74篇
  2013年   76篇
  2012年   555篇
  2011年   2385篇
  2010年   2515篇
  2009年   1473篇
  2008年   1700篇
  2007年   2170篇
  2006年   27篇
  2005年   216篇
  2004年   169篇
  2003年   112篇
  2002年   66篇
  2001年   31篇
  2000年   54篇
  1999年   17篇
  1998年   23篇
  1997年   16篇
  1996年   10篇
  1994年   3篇
  1993年   4篇
  1990年   7篇
  1989年   2篇
  1987年   4篇
  1986年   6篇
  1985年   2篇
  1983年   3篇
  1981年   4篇
  1980年   5篇
  1979年   3篇
  1976年   3篇
  1975年   2篇
  1974年   4篇
  1969年   4篇
  1966年   3篇
  1957年   1篇
  1956年   2篇
  1955年   1篇
  1952年   1篇
  1951年   1篇
  1950年   1篇
  1949年   1篇
  1937年   1篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
21.
Generalization of four retarded children's object naming responses to stimuli in the natural environment was assessed after training with either objects or pictures of the objects. Generalization was typically greater after training with objects. In a second experiment, half of the stimuli that showed little generalization were retrained by alternating the original training object with an object that belonged to the same stimulus class as the training stimulus. The other half were simply retrained using the object. The alternating procedure resulted in substantial increases in generalization to untrained objects.  相似文献   
22.
Research shows that parents have a strong influence on the party preferences of their children. Yet little is known about how such preferences are transmitted in multiparty systems with weak party identification and high electoral volatility. We propose a model of intergenerational transmission that includes both direct effects of parents' party preferences on those of their children, as well as indirect effects through left–right and issue positions. We test this model with original survey data of Dutch adolescents (14–20 years old) and their parents (N = 751 adolescent-parent pairs). We find two paths through which parents exert influence on the party preferences of their adolescent children. On the first path, parental party preferences function as a direct predictor of adolescent party preferences. On the second path, adolescent left–right and issue positions function as a mediator between parental left–right and issue positions and adolescent party preferences, with the effect of left–right positions being stronger than that of issue positions. The frequency with which adolescents discuss political topics with their parents moderates these effects.  相似文献   
23.
24.
The essay examines the argument advanced by E.D. Hirsch, Jr., for instituting ‘cultural literacy’ as a fundamental priority of schools. A number of confusions and equivocations in Hirsch's reasoning are identified, and the propensity of his project to indoctrinate is exposed. Among the features of Hirsch's argument shown to be troubling are his shifting construal of ‘language’, his inconsistency about the requirements of cultural literacy, and his uncritical relation to traditional images of the American past and present. The upshot is to raise the question why Hirsch's project has elicited wide support and praise.  相似文献   
25.
26.
How can we explain that an assertion on something perceived can be understood in the same manner by somebody who cannot perceive that scene? This problem bases the interest in computational linguistics in how listener modeling could possibly be harmonized with reference semantics. Mental images substituting real perception appear as a way out. The architecture of the listener model has to be adapted to the creation and use of such pictorial data structures. Furthermore, the relation between the latter and a verbal (i. e., propositional) representation must be understood. The resulting architecture of a listener model with reference semantics can be employed to solve communicational problems from three general classes in a better way, as is demonstrated by an example implementation.  相似文献   
27.
Several studies have shown the influence of schooling on a variety of cognitive skills. However, since the tasks employed were nearly always derived from the school setting, such findings provide no adequate answer to the following question: given a cognitive task with which schooled and unschooled subjects have had equal experience, does schooling still have an effect? Opposing views are held about this question, and the aim of the present study was to contribute towards answering it. Twenty-four schooled and 24 unschooled subjects, evenly divided by sex within each group, were given a recall task based on an indigenous game equally familiar to all of them. The task involved positions, numbers, and combinations of both. The performance of schooled subjects was very significantly superior on all aspects of the tasks. With regard to position there was an interaction indicating that women's performance was particularly enhanced by schooling, but this was not the case with numbers. Results thus support the view that schooling does have a general effect not necessarily mediated by specific experience. Moreover, in the light of the proportion of variance accounted for among different component tasks, it is suggested that a major effect of schooling might be an increased ability to process complex information.  相似文献   
28.
It was hypothesized in a two-person situation that students would perform significantly better on intellectual tasks when paired with a liked other than when paired with a disliked other. In a laboratory experiment, 108 male undergraduates performed one of three types of intellectual tasks with an attitudinally similar or dissimilar partner or with a partner about whom the subject had no attitude information. Individuals paired with a similar partner felt affectively more positive than those paired with a dissimilar partner (p < .01). Individuals paired with a similar other performed significantly better on the tasks than those paired with a dissimilar partner (p < .01).  相似文献   
29.
30.
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