全文获取类型
收费全文 | 2317篇 |
免费 | 79篇 |
国内免费 | 1篇 |
专业分类
2397篇 |
出版年
2021年 | 20篇 |
2020年 | 21篇 |
2019年 | 31篇 |
2018年 | 38篇 |
2017年 | 45篇 |
2016年 | 36篇 |
2015年 | 29篇 |
2014年 | 58篇 |
2013年 | 206篇 |
2012年 | 70篇 |
2011年 | 92篇 |
2010年 | 53篇 |
2009年 | 68篇 |
2008年 | 69篇 |
2007年 | 72篇 |
2006年 | 75篇 |
2005年 | 71篇 |
2004年 | 74篇 |
2003年 | 57篇 |
2002年 | 70篇 |
2001年 | 27篇 |
2000年 | 32篇 |
1999年 | 39篇 |
1998年 | 42篇 |
1997年 | 34篇 |
1996年 | 29篇 |
1995年 | 31篇 |
1994年 | 28篇 |
1993年 | 30篇 |
1992年 | 37篇 |
1991年 | 24篇 |
1990年 | 26篇 |
1989年 | 24篇 |
1988年 | 28篇 |
1987年 | 24篇 |
1986年 | 23篇 |
1985年 | 37篇 |
1984年 | 39篇 |
1983年 | 21篇 |
1982年 | 29篇 |
1981年 | 45篇 |
1980年 | 40篇 |
1979年 | 27篇 |
1978年 | 51篇 |
1977年 | 43篇 |
1976年 | 27篇 |
1975年 | 47篇 |
1974年 | 37篇 |
1973年 | 33篇 |
1972年 | 18篇 |
排序方式: 共有2397条查询结果,搜索用时 15 毫秒
911.
This study examined the relationship of preexisting efficacy for exercise with perceptions of effort expenditure and in-task affect during exercise testing. Subjects comprised sedentary, middle-aged adults participating in a submaxi-mal cycle ergometer-graded exercise test. Perceptions of efficacy were assessed prior to and following exercise testing while perceptions of effort expenditure and in-task affect were assessed at 70% of predicted maxim heart rate. Highly efficacious subjects had lower perceptions of effort expenditure and reported more positive affect during exercise than did their less efficacious counterparts. Affective responses during exercise were in turn significant predictors of posttest self-efficacy. These results are discussed in regard to the importance of examining the role of personal efficacy in the formation of exercise-related affect and affective responses as sources of efficacy or competence information in exercise. 相似文献
912.
C. Scott Rigby Edward L. Deci Brian C. Patrick Richard M. Ryan 《Motivation and emotion》1992,16(3):165-185
Researchers have typically portrayed intrinsic and extrinsic motivation as dichotomous. Although this dichotomy has explanatory utility, we present a differentiated view of extrinsic motivation, arguing that the relative autonomy of one's motivated actions is more useful for characterizing the motivational basis of learning than is the undifferentiated intrinsic-extrinsic dichotomy. Our concept of autonomous extrinsic motivation is based on a developmental analysis of the processes of internalization and integration. In this article we review extensive research indicating that intrinsic motivation and integrated internalization are facilitated by autonomy supportive social contexts, and that these autonomous forms of motivation, in turn, promote high-quality learning.Preparation of this article was facilitated in part by research grant HD-19914 from the National Institute of Child Health and Human Development to the Human Motivation Program in the Department of Psychology at the University of Rochester. 相似文献
913.
The cult controversy has now spanned two decades. New religious movements clearly have engendered considerable opposition, but there is relatively little information concerning the impact of the cult controversy on public opinion. This article reports on the results of a national survey of both the general public and institutional elites. Support for four specific forms of social control was assessed. The results indicate considerable support for controls among the general population but lower levels of support among institutional elites. The least support is observed for blocking publication of the Unification Church sponsored Washington Times and the greatest support is registered for prohibiting proselytization of teenagers by all new religious groups. The findings are helpful in interpreting the outcome of the cult controversy to date and suggest that the potential for redrawing church-state boundaries remains. 相似文献
914.
ON THE NATURE AND FUNCTIONS OF MOTIVATION THEORIES 总被引:7,自引:0,他引:7
Edward L. Deci 《Psychological science》1992,3(3):167-171
915.
Three experiments examined the effect of context on the representativeness ordering of exemplars of a category. Experiments 1 and 2 employed an online reading time paradigm to examine the effect of context on the time it takes to establish an anaphoric reference between an exemplar and a category term. Experiment 1 demonstrated that context can change the relation between a category term and an exemplar at the time of comprehension. Experiment 2 showed that category terms presented in context generate graded goodness-of-example distributions of exemplars that are different from the distributions generated in the absence of explicit context. These distributions cannot be derived by assuming that the exemplar most strongly suggested by the context serves as the category representation. Experiment 3 employed a membership verification paradigm. Response time was found to be a function of degree of relatedness to the contextdependent category representation. Typicality, as determined in the absence of explicit context, had no effect on decision time. Several models, including some extensions of current semantic memory theories, are developed to account for the results of these experiments. 相似文献
916.
Roderick M. Chisholm John Corcoran Jorge Gracia L. S. Carrier T. N. Pelegrinis Alfred L. Ivry D. S. Clarke Jr. Leo Rauch Robert Young Michael J. Loux Rita Nolan Gerald Vision E. D. Klemke Ruth Anna Putnam Edward S. Reed Maurice Mandelbaum John Wettersten Rachel Shihor 《Philosophia》1983,13(1-2):81-191
917.
918.
This paper explores some of the ethical (and legal) implications of artificial insemination and in vitro fertilization. In both cases the emphasis is on the interests of the potential child. It concludes that in neither case is great optimism or great pessimism appropriate. About AID, much of the legal and ethical concern has been other than child-centered, and has focused mainly on the interests of parents and donors. Three aspects expecially remain troubling: donor selection, record-keeping and disclosure and the testing of frozen semen. About further IVF research, approval appears justified, as long as remaining concerns about risk/safety and need are satisfied. 相似文献
919.
920.
Prototype theory construes membership in a concept's extension as graded, determined by similarity to the concept's “best” exemplar (or by some other measure of central tendency). The present paper is concerned with the compatibility of this view of concept membership with two criteria of adequacy for theories of concepts. The first criterion concerns the relationship between complex concepts and their conceptual constituents. The second concerns the truth conditions for thoughts corresponding to simple inclusions. 相似文献