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   21855篇
  免费   73篇
  国内免费   2篇
  2020年   21篇
  2019年   41篇
  2018年   3503篇
  2017年   2843篇
  2016年   2266篇
  2015年   216篇
  2014年   109篇
  2013年   227篇
  2012年   619篇
  2011年   2430篇
  2010年   2552篇
  2009年   1520篇
  2008年   1738篇
  2007年   2212篇
  2006年   74篇
  2005年   259篇
  2004年   205篇
  2003年   148篇
  2002年   109篇
  2001年   58篇
  2000年   78篇
  1999年   42篇
  1998年   36篇
  1997年   36篇
  1996年   23篇
  1995年   26篇
  1994年   14篇
  1993年   21篇
  1992年   21篇
  1991年   15篇
  1990年   22篇
  1989年   15篇
  1988年   20篇
  1987年   18篇
  1986年   14篇
  1985年   23篇
  1984年   21篇
  1983年   15篇
  1980年   17篇
  1979年   20篇
  1978年   13篇
  1977年   19篇
  1976年   21篇
  1975年   20篇
  1974年   21篇
  1973年   18篇
  1971年   16篇
  1970年   14篇
  1967年   17篇
  1966年   14篇
排序方式: 共有10000条查询结果,搜索用时 46 毫秒
61.
This study was conducted to examine the relations between dimensions of perfectionism and suicide ideation in an adolescent psychiatric sample. A sample of 66 adolescents from an inpatient psychiatric facility completed the Child and Adolescent Perfectionism Scale, the Child's Hopelessness Scale, and the Suicide Ideation Questionnaire. Overall, the results indicated that socially prescribed perfectionism was associated with greater suicide ideation and that it, along with hopelessness, accounted for unique variance in suicide ideation scores. The findings are discussed in terms of their practical and theoretical significance as well as their consistency with similar research with adults.  相似文献   
62.
63.
64.
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   
65.
Two self-paced reading-time experiments are reported that examine the time course of pronoun interpretation processes based on local discourse structure and on world knowledge. The characterization of local discourse structure is based on recent work on centering, which provides a specific formulation of how the ways in which sentences make reference to common entities determines the coherence of discourse segments and how discourse structure influences interpretation of ambiguous pronouns. The results of the first experiment show that readers generate a default interpretation of a pronoun based on features of local discourse structure, and that that default interpretation is later confirmed or overridden by knowledge-based processes. The results of the second experiment show that local discourse structure continues to influence pronoun interpretation even when the semantic information that ultimately compels interpretation occurs before the pronoun. These results support the view that processes acting on local discourse structure play a powerful role in guiding language comprehension.  相似文献   
66.
Many will ask what Harlem finds to honor in the stormy, controversial and bold young captain. And we will smile. And we will answer and say unto them: Did you ever talk to Brother Malcolm? Did he ever touch you? Did you have him smile at you? Did he ever do a mean thing? Was he ever himself associated with violence or any public disturbance? For if you did, you would know him and if you knew him you would know why we must honor him.  相似文献   
67.
In a recent paper, Vredenburg, Flett, and Krames (1993) hypothesized that the apparent instability of depressive symptom scores in college students may be due, in part, to the phenomenon known as statistical regression to the mean. This statistical principle was demonstrated in the current study. A sample of 183 university students completed the Beck Depression Inventory (BDI) at two timepoints separated by a 3-month interval. Consistent with past results, analyses revealed substantial changes in symptom scores over time with decrements being evident among many subjects with elevated symptom scores at Time 1. Examination of the amount of change over time in BDI scores indicated a pattern of findings that approximated the regression to the mean phenomenon. Statistical tests confirmed that regression to the mean accounted for a significant amount of the change in symptom scores over time. The implications of these findings are discussed in terms of the nature of depressive symptoms in students and the inappropriateness of assigning subjects to depressed or nondepressed groups on the basis of elevated scores on a self-report measure.  相似文献   
68.
A DEVELOPMENTAL DEFICIT IN LOCALIZING OBJECTS FROM VISION   总被引:3,自引:0,他引:3  
Abstract— We describe a college student, A. H., with a developmental deficit in determining the location of objects from vision. The deficit is selective in that (a) localization from auditory or tactile information is intact, (b) A H reports the identity of mislocalized objects accurately, (c) visual localization errors preserve certain parameters of the target location, and (d) visual localization is severely impaired under certain stimulus conditions, but nearly intact under other conditions. These results bear on the representation and processing of location information in the visual system, and also have implications for understanding developmental dyslexia.  相似文献   
69.
A comprehensive analysis of socialization requires a complex model that both explicates and synthesizes the various subprocesses involved in this phenomenon. Traditional concerns with socialization that have focused almost exclusively on its objective functions, that is, on those which serve society and its institutions, need to be complemented by an equal emphasis on subjective functions in terms of the sociological and psychological development of the individual. Chiefly relevant in this latter respect is the production of basic human needs and the consequences that result from their inadequate gratification in unauthentic and/or unresponsive societies. One such outcome that is particularly crucial to both personal and societal function is that of alienation, which can be assessed specifically in terms of its significance for civic participation. Our model recognizes the limits of both human systems and social systems; and, in terms of the principles of authenticity and responsivity, it articulates the linkage among these systems constituting the essence of socialization. Our model also provides an implicit clarification of the nature and meaning of citizenship in a democracy, which by definition should be a responsive society, and delineates the required sociopsychological images for maximizing the role of political participation.  相似文献   
70.
Computationally intensive methods of statistical inference do not fit the current canon of pedagogy in statistics. To accommodate these methods and the logic underlying them, I propose seven pedagogical principles: (1) Define inferential statistics as techniques for reckoning with chance. (2) Distinguish three types of research: sample surveys, in which statistics affords generalization from the cases studied; experiments, in which statistics detects systematic differences among the batches of data obtained in the several conditions; and correlational studies, in which statistics detects systematic associations between variables. (3) Teach random-sampling theory in the context of sample surveys, augmenting the conventional treatment with bootstrapping. Regarding experimentation, (4) note that random assignment fosters internal but not external validity, (5) explain the general logic for testing a null model, and (6) teach randomization tests as well ast,F, and χ2. (7) Regarding correlational studies, acknowledge the problems of applying inferential statistics in the absence of deliberately introduced randomness.  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