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   4442篇
  免费   510篇
  国内免费   232篇
  2024年   23篇
  2023年   111篇
  2022年   78篇
  2021年   152篇
  2020年   226篇
  2019年   262篇
  2018年   194篇
  2017年   233篇
  2016年   262篇
  2015年   181篇
  2014年   190篇
  2013年   553篇
  2012年   141篇
  2011年   180篇
  2010年   118篇
  2009年   187篇
  2008年   180篇
  2007年   188篇
  2006年   174篇
  2005年   157篇
  2004年   120篇
  2003年   108篇
  2002年   114篇
  2001年   112篇
  2000年   93篇
  1999年   92篇
  1998年   70篇
  1997年   53篇
  1996年   59篇
  1995年   55篇
  1994年   46篇
  1993年   54篇
  1992年   41篇
  1991年   39篇
  1990年   47篇
  1989年   24篇
  1988年   27篇
  1987年   24篇
  1986年   24篇
  1985年   19篇
  1984年   16篇
  1983年   14篇
  1982年   21篇
  1981年   12篇
  1980年   17篇
  1979年   17篇
  1978年   32篇
  1977年   21篇
  1976年   18篇
  1975年   3篇
排序方式: 共有5184条查询结果,搜索用时 31 毫秒
31.
It is suggested that molar streams of behavior are constructed of various arrangements of three elementary constituents (elicited, evoked, and emitted response classes). An eight-cell taxonomy is elaborated as a framework for analyzing and synthesizing complex behavioral repertoires based on these functional units. It is proposed that the local force binding functional units into a smoothly articulated kinetic sequence arises from temporally arranged relative response probability relationships. Behavioral integration is thought to reflect the joint influence of the organism's hierarchy of relative response probabilities, fluctuating biological states, and the arrangement of environmental and behavioral events in time.  相似文献   
32.
It is commonly held that even where questionnaire response is poor, correlational studies are affected only by loss of degrees of freedom or precision. We show that this supposition is not true. If the decision to respond is correlated with a substantive variable of interest, then regression or analysis of variance methods based upon the questionnaire results may be adversely affected by self-selection bias. Moreover such bias may arise even where response is 100%. The problem in both cases arises where selection information is passed to the score indirectly via the disturbance or individual effects, rather than entirely via the observable explanatory variables. We suggest tests for the ensuing self-selection bias and possible ways of handling the ensuing problems of inference.The author would like to thank members of the Psychology Department at UWA for references on the illustrative example, namely the effects of sex-stereotyping on achievements in mathematics; thanks are also due to the anonymous reviewers whose comments resulted in material improvements to the paper.  相似文献   
33.
A direct method in handling incomplete data in general covariance structural models is investigated. Asymptotic statistical properties of the generalized least squares method are developed. It is shown that this approach has very close relationships with the maximum likelihood approach. Iterative procedures for obtaining the generalized least squares estimates, the maximum likelihood estimates, as well as their standard error estimates are derived. Computer programs for the confirmatory factor analysis model are implemented. A longitudinal type data set is used as an example to illustrate the results.This research was supported in part by Research Grant DAD1070 from the U.S. Public Health Service. The author is indebted to anonymous reviewers for some very valuable suggestions. Computer funding is provided by the Computer Services Centre, The Chinese University of Hong Kong.  相似文献   
34.
35.
Forced classification: A simple application of a quantification method   总被引:1,自引:0,他引:1  
This study formulates a property of a quantification method, the principle of equivalent partitioning (PEP). When the PEP is used together with Guttman's principle of internal consistency (PIC) in a simple way, the combination offers an interesting way of analyzing categorical data in terms of the variate(s) chosen by the investigator, a type of canonical analysis. The study discusses applications of the technique to multiple-choice, rank-order, and paired comparison data.This study was supported by the Natural Sciences and Engineering Research Council of Canada (Grant No. A7942). Comments on the earlier drafts from anonymous reviewers and the editor were much appreciated.  相似文献   
36.
Redundancy analysis (also called principal components analysis of instrumental variables) is a technique for two sets of variables, one set being dependent of the other. Its aim is maximization of the explained variance of the dependent variables by a linear combination of the explanatory variables. The technique is generalized to qualitative variables; it then gives implicitly a simultaneous optimal scaling of the dependent, qualitative variables. Examples are taken from the Dutch Life Situation Survey 1977, using Satisfaction with Life and Happiness as dependent variables. The analysis leads to one well-being scale, defined by the explanatory variables Marital status, Schooling, Income and Activity.The views expressed in this paper are those of the author and do not necessarily reflect the policies of the Netherlands Central Bureau of Statistics.  相似文献   
37.
38.
This written exchange is between a senior and a younger Jungian analyst on issues relevant to the development of analytical psychology throughout the world today. The younger analyst, Stefano Carpani, considers himself a neo-Jungian. He explains to John Beebe, known for post-Jungian contributions to the study of typology, integrity, and gender, how important it is to include sociological perspectives alongside those that stem from the Jungian practice of relational psychoanalysis. The degree to which analysis has become an extended meditation on the relation of individual self-exploration to supra-personal Self-realization is emphasized by both authors, who envision this introspection leading to an expanded inner openness that Carpani has called “absolute freedom.” The authors conclude that absolute freedom is a space of engaged reflection that can permit an informed but individualized approach to the complexities of the world soul today.  相似文献   
39.
The present research aims to identify unique characteristics of written conspiracy theories. In two pre-registered quantitative human-coded content analyses, we compared 36 pairs of conspiratorial and non-conspiratorial online articles about various events. As predicted, conspiratorial articles—compared to non-conspiratorial articles—contained less factual, more emotional and more threat-related information. Also, we predicted and found that conspiratorial articles presented more argumentation against the opposing standpoint and that they provided explanations that were more dispositional and less falsifiable. Contrary to our predictions, we did not consistently observe that conspiratorial articles presented less argumentation for their own standpoint. Also, we did not find consistent support that conspiratorial articles provided less information about the specific process or more information about the underlying goals of the respective events, or that conspiratorial explanations attributed the events to a lesser extent to situational factors. We discuss the relevance of our findings for the understanding of conspiracy theories.  相似文献   
40.
New theological understanding can emerge with the advancement of scientific knowledge and the use of new concepts, or older concepts in new ways. Here, the authors present a proposal to extend the concept of “rescue and recovery” found in the United Nations Law of the High Seas, off-world and within a broader purview of other intelligent and self-aware species that humans may someday encounter. The notion of a morality that extends to off-world species is not new, but in this analysis, rescue and recovery become an imperative when any intelligent and self-aware species is in harm's way. Rescue and recovery encompass a necessary action component except perhaps in those cases where rescuers are in danger. The authors explore three biblical examples of rescue and recovery to derive a fundamental meaning of the concept.  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