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   25225篇
  免费   1063篇
  国内免费   19篇
  2023年   136篇
  2021年   230篇
  2020年   423篇
  2019年   508篇
  2018年   669篇
  2017年   642篇
  2016年   734篇
  2015年   500篇
  2014年   670篇
  2013年   2777篇
  2012年   1136篇
  2011年   1188篇
  2010年   788篇
  2009年   823篇
  2008年   1122篇
  2007年   1091篇
  2006年   1055篇
  2005年   930篇
  2004年   927篇
  2003年   910篇
  2002年   883篇
  2001年   418篇
  2000年   409篇
  1999年   397篇
  1998年   377篇
  1997年   361篇
  1996年   291篇
  1995年   306篇
  1994年   291篇
  1993年   275篇
  1992年   261篇
  1991年   257篇
  1990年   239篇
  1989年   218篇
  1988年   193篇
  1987年   213篇
  1986年   209篇
  1985年   256篇
  1984年   268篇
  1983年   231篇
  1982年   234篇
  1981年   256篇
  1980年   225篇
  1979年   209篇
  1978年   222篇
  1977年   195篇
  1976年   197篇
  1975年   158篇
  1974年   180篇
  1973年   140篇
排序方式: 共有10000条查询结果,搜索用时 46 毫秒
131.
A rule of thinking which would absolutely prevent me from acknowledging certain kinds of truth, if those kinds of truth were really there, would be an irrational rule.  相似文献   
132.
GRADER, a computer program that makes student test and/or course letter grade recommendations to instructors, is described. The program uses an algorithm to combine the content mastery (percentage correct) and peer comparison (“curve”) approaches to set grade cutoffs. In addition to standardizing the procedures with which letter grade cutoffs are made, GRADER may help to reduce instructor grading subjectivity and obviate tendencies toward grade inflation or deflation.  相似文献   
133.
Teams are playing an increasingly important role in the workplace. However, reviews of the team performance literature have suggested that there are serious deficiencies in our understanding of team processes and performance (e.g., Dyer, 1984). These difficulties may be attributable, in part, to the lack of laboratory methodologies to investigate team performance. This paper describes the use of low-fidelity simulations as a potentially useful paradigm for researching team coordination and performance. This paradigm is advantageous in that it offers relatively high levels of experimental control and task representation at a low cost.  相似文献   
134.
The Psychological Record - The present experiments investigated blocking effects in rhesus monkeys (Macaca mulatta) in a discrimination learning paradigm using a single stimulus modality. Two...  相似文献   
135.
Reviews     
  相似文献   
136.
137.
School science education is currently the subject of much debate. Historians and philosophers of science should play a role in this debate. Since the late nineteenth century there has been a persistent, if minor, tradition arguing for the incorporation of historical and philosophical dimensions in the teaching of school science. With the current crisis in science teaching, there are encouraging signs that more attention is being paid to this tradition. What is required is much greater collaboration between philosophers, historians, and science educators, particularly in the training of teachers.This article is a shortened version of my 1988, A Role for History and Philosophy in Science Teaching, inEducational Philosophy and Theory 20 (2). All references are to the following History, Philosophy, and Science Teaching: A Bibliography.This special number ofSynthese is part of a large international project on the place of history and philosophy in science teaching. Special issues ofEducational Philosophy and Theory, Interchange, andStudies in Philosophy and Education are being produced. An international conference on the subject will be held at Florida State University in November 1989. Details of the journals and the conference can be obtained from the author.The project commenced while the author was on leave at Florida State University in 1987. It began with a gracious invitation from Jaakko Hintikka to guest edit this number, and was furthered with the support and encouragement of David Gruender. I thank them both, and also the Philosophy Department for its hospitality. Special appreciation is due to the nearly 30 authors who have contributed papers to the project. I hope that their efforts will re-open the needed dialogue between historians, philosophers, and science educators.  相似文献   
138.
Two experiments involving paired comparisons of numerical and nonnumerical expressions of uncertainty are reported. Subjects were timed under two opposing sets of instructions ("choose higher probability" vs. "choose lower probability"). Numerical comparisons were consistently faster and easier than their nonnumerical counterparts. Consistent distance and congruity effects were obtained, illustrating that both numerical and nonnumerical expressions of uncertainty contain subjective magnitude information, and suggesting that similar processes are employed in manipulating and comparing numerical and verbal terms. To account for the general pattern of results obtained, Holyoak's reference point model (1978) was generalized by explicitly including the vagueness of the nonnumerical expressions. This generalized model is based on the notion that probability expressions can be represented by membership functions (Wallsten, Budescu, Rapoport, Zwick, & Forsyth, 1986) from which measures of location for each word, and measures of overlap for each pair can be derived. A good level of fit was obtained for this model at the individual level.  相似文献   
139.
A group of 115 black male adolescents drawn from a clinically unselected birth cohort, half of whom were known to have had neurological soft signs at age 7, were examined at age 17 to determine the relation between soft signs and performance on standard tests of school achievement and sustained attention. Three signs measured at age 17-dysgraphesthesia, difficulties with rapid alternating movements (dysdiadochokinesis), and motor slowness—were related to lower concurrent and past IQ and to impaired performance on laboratory and paper-and-pencil measures of sustained attention. The relation between signs and the attentional measures remained significant after IQ was statistically controlled. The three age 17 soft signs as well as age 7 signs were related to impaired performance on standardized tests (age 17) of school achievement. Most of the relation between signs and school achievement could be accounted for by the variance signs shared with sustained attention. One sign, mirror movements, was unrelated to all other attentional and cognitive measures.The study was supported by center grant MH 306906 and research training grant 5 T32 MH 13043-13 from the National Institute of Mental Health, as well as by the City College and the City University Computing Centers. We thank Lillian Belmont and two reviewers for their critical comments on an earlier version of the paper. We dedicate this paper to the memory of Joseph Barmack.  相似文献   
140.
This study investigated problems commonly experienced by adolescents and the strategies they use to cope with these events. Coping strategies were examined across the subjects' omotional state and their evaluation of the problem. In general, adolescents reported four common Stressors that were similar across age groups and gender. However, males differed from females in the frequency of these problems. Further, while the Stressors were similar, the frequency with which the coping strategies were employed and the efficacy ascribed to them differed across sex and across problem type. These findings are discussed in terms of the stress and coping literature with adults and the implications for clinical assessment and treatment of adolescents.  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