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   61249篇
  免费   2448篇
  国内免费   20篇
  63717篇
  2019年   751篇
  2018年   1005篇
  2017年   1048篇
  2016年   1113篇
  2015年   806篇
  2014年   953篇
  2013年   4578篇
  2012年   1781篇
  2011年   1953篇
  2010年   1199篇
  2009年   1200篇
  2008年   1726篇
  2007年   1742篇
  2006年   1599篇
  2005年   1429篇
  2004年   1313篇
  2003年   1238篇
  2002年   1350篇
  2001年   1986篇
  2000年   1961篇
  1999年   1501篇
  1998年   728篇
  1997年   633篇
  1996年   640篇
  1995年   567篇
  1993年   570篇
  1992年   1260篇
  1991年   1166篇
  1990年   1151篇
  1989年   1061篇
  1988年   1037篇
  1987年   992篇
  1986年   1063篇
  1985年   1070篇
  1984年   908篇
  1983年   829篇
  1982年   599篇
  1981年   591篇
  1979年   970篇
  1978年   704篇
  1975年   787篇
  1974年   854篇
  1973年   938篇
  1972年   783篇
  1971年   745篇
  1970年   661篇
  1969年   693篇
  1968年   876篇
  1967年   800篇
  1966年   663篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
51.
52.
Public goods theories highlight an incentive system that rewards ‘free riding’ on the contributions of early contributors toward collective actions. However, because such theories focus on creation of the good, they may underestimate returns that accrue to early contributors subsequent to the good's realization. The concept of formative investment is introduced here to describe the extent to which organizations help to create public goods such as interorganizational linkages like participatory federations. Data from the CEOs of 48 organizations involved in a participatory federation were used to assess how an organization's level of formative investment is related to later patterns of dependency and interaction among federation members. Findings suggest that from a long‐term perspective, and for goods that involve communication and interaction, the incentive structure may not be so favorable for free riders. To the extent that organizations with high formative investment have the capability to envision the future and communicate that vision to potential federation partners, they may be able to both reduce free riding and secure for themselves advantageous positions in the subsequent network of relations.  相似文献   
53.
54.
55.
The token economy has been the primary model for the behavioral management of inpatient populations. However, this basically operant approach seldom emphasizes the development of cognitive-coping skills to help patients more effectively manage stressors that result in hospitalization. The Therapeutic Contract Program (TCP) is described as an inpatient-treatment strategy that is designed to help foster such cognitive-coping and self-control skills. While external structure is provided by components of this program, subprograms of the TCP have as their goal the development of internally-attributed coping skills and self-perceptions of competence. This preliminary report describes the structure of the TCP, as well as planned and in-progress measures of program participation and treatment outcome.  相似文献   
56.
Three factors that have transformed perceptual research in the last fifty years are the digital computer, single-unit electrophysiology, and molecular biology. Amongst the developments in which members of the Experimental Psychology Society have been central are: the recognition of the role of optic flow in spatial vision; the demonstration that our perceptual systems contain parallel pathways extracting different information from the sensory array; the identification of specific detectors that can be selectively adapted in psychophysical experiments; and the transfer of the concepts of fourier analysis from audition to vision. The history of Opponent Process Theory offers an example where experimental psychologists have been misled by too simple an interpretation of physiological recordings.  相似文献   
57.
58.
59.
60.
The positive link between attitude similarity and attraction is one of the fundamental outcomes in social psychology. However, attitude dissimilarity seems to be a stronger driver of this relationship than attitude similarity. The authors review the evidence on this similarity–dissimilarity asymmetry, and discuss two explanations. One is that people generally enter into interactions with optimism, and so supposedly neutral partners are often seen as mildly positive. Another is that dissimilar attitudes carry greater weight than similar attitudes in cognitive processes. Implications of these mechanisms for wider issues in person perception and attitude structure are discussed, connecting them with more recent theories of attitudinal ambivalence and evaluative space.  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