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   25617篇
  免费   875篇
  国内免费   14篇
  2020年   246篇
  2019年   274篇
  2018年   394篇
  2017年   461篇
  2016年   457篇
  2015年   289篇
  2014年   374篇
  2013年   2018篇
  2012年   722篇
  2011年   794篇
  2010年   502篇
  2009年   477篇
  2008年   668篇
  2007年   669篇
  2006年   608篇
  2005年   549篇
  2004年   536篇
  2003年   502篇
  2002年   558篇
  2001年   781篇
  2000年   798篇
  1999年   594篇
  1998年   298篇
  1997年   249篇
  1992年   492篇
  1991年   443篇
  1990年   485篇
  1989年   440篇
  1988年   431篇
  1987年   419篇
  1986年   434篇
  1985年   461篇
  1984年   372篇
  1983年   351篇
  1982年   280篇
  1981年   253篇
  1979年   424篇
  1978年   310篇
  1977年   285篇
  1976年   254篇
  1975年   366篇
  1974年   400篇
  1973年   390篇
  1972年   344篇
  1971年   302篇
  1970年   271篇
  1969年   337篇
  1968年   384篇
  1967年   345篇
  1966年   336篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
971.
Enhancing possible selves in Mexican American students   总被引:3,自引:0,他引:3  
This project assessed the modifiability of possible selves in young Mexican American children. Three intervention conditions were compared in a pre- and posttest design: child-only intervention, parent and child intervention, and a no-intervention control. Following eight intervention sessions, children in the two intervention groups showed significant gains in understanding the characteristics associated with becoming a good student and in recognizing the value of education in bringing about future occupational goals. Children in the intervention conditions also reported greater interest in becoming a physician, judge, or pilot — occupations they had directly experienced during training. The parent intervention phase contributed little to augmenting the positive results attributable to the child intervention component.This research was conducted under the auspices of NIH Grant HD-24003. We wish to thank Maritza Robles and the staff of the Bilingual program of the South Bend, IN, Corporation for their support.  相似文献   
972.
Studies that have found an association between unemployment and psychological depression often fail to establish the direction of causal influence. Analyses of Epidemiologic Catchment Area panel data revealed that of employed respondents not diagnosed with major depression at first interview, those who became unemployed had over twice the risk of increased depressive symptoms and of becoming clinically depressed as those who continued employed. Although the increase in symptoms was statistically significant, the effect on clinical depression was not, possibly because of the low power of the test. The reverse causal path from clinical depression at Time 1 to becoming unemployed by Time 2 was not supported. The unemployment rate in the respondent's community at time of interview was not related directly to psychological depression but appeared associated indirectly with depression via its impact on the risk of becoming unemployed. Implications for policy and further research were discussed. The research described in this paper was supported by Grant #5 RO1 AA08379-02 from the National Institute of Alcohol Abuse and Alcoholism. The authors appreciate the suggestions provided by members of the Consortium for Research Involving Stress Processes sponsored by the W. T. Grant Foundation and by two anonymous journal reviewers.  相似文献   
973.
974.
Philip Pettit 《Philosophia》1994,23(1-4):157-170
  相似文献   
975.
Book reviews     
Scientific Discovery A. Kantorovich 1993 New York, State University of New York Press $17.95

A Model of the Universe Storrs McCall, 1994 Clarendon Press, Oxford 288pp. plus 15pp. appendices, plus 14pp. references plus index 0198240538 £30.00

Explanation David Hillel Ruben (ed. 1993) Oxford University Press pp vi + 365 ISBN 019875129X. Pb £9.95, Hb £27.50  相似文献   

976.
Two experiments are reported addressing the preparation and initiation of movements with equal or unequal timing properties for both hands. Temporal coordination was examined in two movement tasks: one in which both hands performed the movements simultaneously (simultaneous aiming task) and one in which only one alternative of two possible movements was executed (choice aiming task). For each task a different group of subjects was used. Besides the timing relationships between both movements, the effects of preparation interval (1, 3, and 5 s), the average velocity (7, 14, 17.5, and 70 cm/s), the presence of advance information about the required velocity of the movement(s), and practice were investigated. Based on the common- and the specific-timing notions, distinct hypotheses were tested as to the effects of the variables on the temporal coordination as revealed by reaction time. A main result was that the effects of timing differences between the hands was task specific. For the choice task the data are in agreement with the common-timing notion of coordination, i. e., only one timing demand at a time can be prepared, whereas in the simultaneous task evidence was obtained for the specific-timing notion, i. e., independent preparation and initiation of different timing properties for the hands. However, it is argued that the results of the choice task probably do not reflect a general inability to prepare movements of different timing requirements for both hands, but is related to a task-specific strategy of selective preparation.  相似文献   
977.
Hall  Judith A.  Halberstadt  Amy G. 《Sex roles》1994,31(3-4):149-165
Sex Roles - Women's superiority in decoding nonverbal cues of emotion has often been discussed as an adaptation to low status. To examine the relation of status to nonverbal sensitivity,...  相似文献   
978.
Philip Hefner 《Zygon》1994,29(1):67-73
Abstract. This piece challenges Michael Ruse on three points: (1) The charge that Christian myth and doctrine are incredible fails to take into account the scholarship that has clarified the genre to which myth belongs and its function. (2) Naturalistic explanations, like Ruse's, have fully as much difficulty dealing with questions of purpose and evil as religion does. (3) The concept of "deception" has a number of inherent problems that Ruse fails to consider, of which the chief is that it requires a certainty about truth and falsity that Ruse cannot and does not claim to possess.  相似文献   
979.
980.
The effects of correcting a personality measure for faking were evaluated within an organizational context. Two possible repercussions of score correction were studied using the 16PF personality inventory: the effect on criterion-related validity and the effect on individual hiring decisions (i.e., which applicants would or would not be hired). Results indicated that correction for faking had little effect on criterion-related validity. However, depending on the selection ratio, correction of scores would have resulted in different hiring decisions than those that would have been made on the basis of uncorrected scores. Implications for organizations using personality measures for selection and recommendations regarding the use of faking corrections are discussed.  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