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   995篇
  免费   31篇
  国内免费   2篇
  2019年   8篇
  2018年   25篇
  2017年   24篇
  2016年   38篇
  2015年   22篇
  2014年   22篇
  2013年   113篇
  2012年   39篇
  2011年   44篇
  2010年   24篇
  2009年   16篇
  2008年   21篇
  2007年   30篇
  2006年   26篇
  2005年   23篇
  2004年   32篇
  2003年   22篇
  2002年   33篇
  2001年   11篇
  2000年   16篇
  1999年   15篇
  1998年   19篇
  1997年   10篇
  1996年   17篇
  1995年   12篇
  1994年   9篇
  1993年   10篇
  1992年   16篇
  1991年   17篇
  1990年   15篇
  1989年   17篇
  1988年   14篇
  1987年   19篇
  1986年   13篇
  1985年   22篇
  1984年   14篇
  1983年   15篇
  1982年   12篇
  1981年   13篇
  1980年   9篇
  1979年   12篇
  1978年   17篇
  1977年   14篇
  1976年   15篇
  1975年   6篇
  1974年   6篇
  1973年   8篇
  1972年   6篇
  1969年   6篇
  1966年   8篇
排序方式: 共有1028条查询结果,搜索用时 15 毫秒
31.
The results of clinical, electroencephalographic and repeated computed tomographic examination of 14 children suffering from epileptic seizures in connection with the West and Lennox-Gastaud syndrome are analyzed and compared. Computed tomography yields little information regarding the etiology of such forms of epilepsy. Distinct clinical and electroencephalographic findings were accompanied by normal computed tomographic results in a large proportion of the cases. To avoid misinterpretation of computed tomographic findings and consequent prognostic errors in these epileptic cases it is necessary to take possible side effects of ACTH and corticosteroid treatment into account. At the climax of hormone treatment computed tomography revealed imposing changes in the form of generalized atrophy in 10 of the 14 children examined. These receded completely upon termination of hormone treatment.  相似文献   
32.
33.
84 student teachers from undergraduate classes at a western university in Kansas completed a 9-question checklist of learning disabilities before interacting with a behavioral disordered/learning disabilities teacher, a paraprofessional, and a high school learning-disabled student. After the dialog, the student teachers completed a Social Readjustment Rating Scale, Breskin Rigidity Test, the Self-evaluation Questionnaire: State and Trait Anxiety, and the same 9-question checklist with one additional question ("Now that you have seen a learning-disabled student has it affected your opinion of learning disabilities?"). The dialog affected 63% of the students' opinions while 31% stated the presentation did not affect their opinion (6% were missing or not completed). Persons who experienced more life-changes and problems tended to rate or view learning disabilities more negatively. The more trait anxiety experienced by the students, the lower they rated learning disabilities after the presentation.  相似文献   
34.
35.
The mechanisms underlying selective attention to gratings consisting of a particular conjunction of spatial frequency and orientation were investigated by means of both visual evoked potential (VEP) and behavioral measures. The effects of selective attention upon the VEP indicated two general types of selection processes: one which is specific to the features contained in the relevant gratings and is most pronounced approximately 225 msec post-stimulation, and another which is specific to the conjunction of features defining the relevant grating and is most pronounced 250–375 msec following the presentation of the stimulus. The behavioral responses primarily reflected this latter, or grating-specific, attentional process. The results are discussed in terms of the role of sensory feature channels in mediating selective attention to visual stimuli and are related to various information processing models of visual pattern selection.  相似文献   
36.
Children aged 7, 10, and 14 were shown sets of photographs of human figures for each of which they made judgments of age or attractiveness. Randomly determined responses appeared under each set of photographs. Half the children were told the responses represented choices of parents and the other half that they represented choices of unfamiliar adults. After the opportunity to imitate, children were asked whom they thought they agreed with the most. Findings indicated only a small, borderline-significant effect for same-sex imitation, but a large, highly significant effect for reported agreement, particularly in the unfamiliar adult condition (p < .001). Discussion centered on two issues: (1) Same-sex effects appear strongest when the act of choosing between adults and the adults' gender are accentuated; and (2) differences between present and previous findings regarding same-sex effects for parents vs unfamiliar adults may relate to the ages of the children investigated.  相似文献   
37.
38.
39.
40.
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