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   22101篇
  免费   115篇
  国内免费   4篇
  2023年   21篇
  2022年   25篇
  2021年   23篇
  2020年   32篇
  2019年   56篇
  2018年   3536篇
  2017年   2865篇
  2016年   2309篇
  2015年   232篇
  2014年   126篇
  2013年   282篇
  2012年   652篇
  2011年   2427篇
  2010年   2563篇
  2009年   1515篇
  2008年   1745篇
  2007年   2226篇
  2006年   81篇
  2005年   258篇
  2004年   220篇
  2003年   169篇
  2002年   115篇
  2001年   66篇
  2000年   95篇
  1999年   48篇
  1998年   48篇
  1997年   37篇
  1996年   23篇
  1995年   14篇
  1994年   18篇
  1992年   29篇
  1991年   11篇
  1990年   19篇
  1988年   16篇
  1987年   14篇
  1985年   17篇
  1984年   18篇
  1983年   14篇
  1982年   14篇
  1981年   11篇
  1979年   13篇
  1977年   10篇
  1976年   12篇
  1975年   14篇
  1974年   12篇
  1973年   11篇
  1971年   15篇
  1970年   16篇
  1968年   12篇
  1967年   17篇
排序方式: 共有10000条查询结果,搜索用时 46 毫秒
41.
The “disjuncture” between level of aspiration and means of accomplishing it can create serious difficulty for the person. The function of the 2-year college in helping the student to resolve this conflict has been described as a “cooling-out” process. Essentially, it involves a running evaluation of the student's capacities, and guidance in helping him to find the educational and vocational program for which he is best suited. Several ways of facilitating this process are presented. There is need for an integrated guidance program pervading the entire institution as well as the student's career at the institution.  相似文献   
42.
43.
Motivational and emotional controls of cognition   总被引:9,自引:0,他引:9  
  相似文献   
44.
45.
Experiments 1 and 2 compared, with a single-stimulus procedure, the discrimination of filled and empty intervals in both auditory and visual modalities. In Experiment 1, in which intervals were about 250 msec, the discrimination was superior with empty intervals in both modalities. In Experiment 2, with intervals lasting about 50 msec, empty intervals showed superior performance with visual signals only. In Experiment 3, for the auditory modality at 250 msec, the discrimination was easier with empty intervals than with filled intervals with both the forced-choice (FC) and the single stimulus (SS) modes of presentation, and the discrimination was easier with the FC than with the SS method. Experiment 4, however, showed that at 50 and 250 msec, with a FC-adaptive procedure, there were no differences between filled and empty intervals in the auditory mode; the differences observed with the visual mode in Experiments 1 and 2 remained significant. Finally, Experiment 5 compared differential thresholds for four marker-type conditions, filled and empty intervals in the auditory and visual modes, for durations ranging from .125 to 4 sec. The results showed (1) that the differential threshold differences among marker types are important for short durations but decrease with longer durations, and (2) that a generalized Weber’s law generally holds for these conditions. The results as a whole are discussed in terms of timing mechanisms.  相似文献   
46.
Sixty-nine Cambodian adolescents and young adults were interviewed to determine their experience as children surviving the Pol Pot regime (1975–1979);their first-year experience of resettlement in this country; and their experience of stressful events during the past year. Current DSM-III-R diagnostic status was also determined. A strong relationship between earlier war trauma, resettlement strain, and symptoms of posttraumatic stress disorder (PTSD) was found. In contrast, the strongest relationship with depressive symptoms was found for recent stressful events. These results are discussed in light of current findings from stress and PTSD research.Dr. Clarke is Assistant Professor of Psychiatry in the Division of Child Psychiatry, Oregon Health Sciences University, Portland, Oregon. Dr. Sack is Director of the Division of Child Psychiatry and Principal Investigator of the Khmer Adolescent Project. Brian Goff is a Research Assistant.This project was supported by the National Institutes of Mental Health [NIMH] grant #5-RO1-MH42927-02, Dr. William H. Sack, M.D., Principal Investigator.  相似文献   
47.
The essay examines the argument advanced by E.D. Hirsch, Jr., for instituting ‘cultural literacy’ as a fundamental priority of schools. A number of confusions and equivocations in Hirsch's reasoning are identified, and the propensity of his project to indoctrinate is exposed. Among the features of Hirsch's argument shown to be troubling are his shifting construal of ‘language’, his inconsistency about the requirements of cultural literacy, and his uncritical relation to traditional images of the American past and present. The upshot is to raise the question why Hirsch's project has elicited wide support and praise.  相似文献   
48.
Simon Davis 《Sex roles》1990,23(1-2):43-50
A study was made of 328 personal advertisements sampled from a major daily Canadian newspaper. It was found that gender differences for desired companion attributes were consistent with traditional sex role stereotypes. Relative to the opposite sex, women emphasized employment, financial, and intellectual status, as well as commitment, while men emphasized physical characteristics. Physical characteristics were the most desired, regardless of sex. Secondary findings were that, for this sample, considerably more men than women placed ads, and that the mean age for both sexes was relatively high. The main findings were similar to those from earlier studies.The author was formerly a psychiatric social worker employed by the Greater Vancouver Mental Health Service in Vancouver, B.C., Canada. He is presently a doctoral candidate at Simon Fraser University in Vancouver. The author would like to thank Dr. Ted Palys for his comments.  相似文献   
49.
Relation algebras from cylindric and polyadic algebras   总被引:1,自引:0,他引:1  
  相似文献   
50.
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