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   57503篇
  免费   2415篇
  国内免费   21篇
  59939篇
  2020年   695篇
  2019年   829篇
  2018年   1172篇
  2017年   1194篇
  2016年   1258篇
  2015年   906篇
  2014年   1076篇
  2013年   5031篇
  2012年   2000篇
  2011年   2002篇
  2010年   1199篇
  2009年   1230篇
  2008年   1727篇
  2007年   1698篇
  2006年   1564篇
  2005年   1290篇
  2004年   1327篇
  2003年   1285篇
  2002年   1214篇
  2001年   1950篇
  2000年   1827篇
  1999年   1366篇
  1998年   643篇
  1997年   544篇
  1996年   626篇
  1995年   570篇
  1994年   559篇
  1993年   549篇
  1992年   1127篇
  1991年   1033篇
  1990年   1022篇
  1989年   977篇
  1988年   951篇
  1987年   882篇
  1986年   871篇
  1985年   938篇
  1984年   748篇
  1983年   648篇
  1982年   496篇
  1979年   775篇
  1978年   585篇
  1975年   612篇
  1974年   698篇
  1973年   713篇
  1972年   607篇
  1971年   567篇
  1970年   489篇
  1968年   617篇
  1967年   538篇
  1966年   513篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
991.
In a retrospective study contrasting the near-death encounters of 183 persons who reported near-death experiences and 63 persons who reported no near-death experience, the two groups did not differ in age, gender, or time elapsed since the near-death encounter. Near-death experiencers reported all 16 items of the NDE Scale significantly more often than did nonexperiencers.  相似文献   
992.
The parent-child relationship plays an important role in Boszormenyi-Nagy's contextual therapy. This article presents the results of four interview studies of the opinions of parents and children about their ethical relationship.The children in these studies were five-to-seven-year-olds, 10-to-12 year olds and 15-year-olds. In one study only the mothers were interviewed, in the other three both parents participated. In all 73 children, 62 mothers, and 43 fathers were interviewed. The majority of parents and children agreed with most aspects of Nagy's theory about the parent-child relation, but there were some notable exceptions. Very few shared Nagy's ideas about entitlement. The age of the child had a clear effect on the opinions of the children on the dimensions of trust/reliability, loyalty and shifting of the balance with age of the child and on the opinions of the parents on the dimensions of childrens' rights, parents' rights, and balance of fairness. The sex of the interviewee had some effect: Mothers and fathers differ on the dimension of parents' rights and adolescent girls and boys differ on the dimensions of childrens' rights and parents' duties.  相似文献   
993.
People use editorial criteria to decide whether to say or to suppress potential arguments. These criteria constitute people's standards as to what effective and appropriate arguments are like, and reflect general interaction goals. A series of empirical investigations has indicated that the standards fall into three classes: those having to do with argument effectiveness, those concerned with personal issues for arguer and target, and those centered on discourse quality. The essay also sketches the affinities certain types of people have for the different criteria.  相似文献   
994.
995.
In this commentary on a study by H. Steven Moffic, et al., of the current status of the Hippocratic Oath in medical education, Veatch discusses the relation of the oath to ethical conduct, the meaning of primum non nocere ("do no harm"), and the limitations of practicing Hippocratic ethics.  相似文献   
996.
997.
Abstract— Subjects' judgments of the mean of 12 scores were influenced by the way in which the scores were dichotomized. The estimated mean was higher when the three highest scores formed one group (e.g., payments for women) and the nine lowest formed the other (e.g., payments for men) than when the nine highest were one group and the three lowest the other. We call this phenomenon the Will Rogers Illusion (WRI). The WRI occurred only when estimates of the subgroup means were made prior to the estimates of the mean of the whole group. When the latter mean was judged first, the WRI was reversed. These and other data indicate that the means of subgroups can influence judgments of group means, a finding that is relevant to research on social stereotypes.  相似文献   
998.
Abstract— The relative predictive accuracy of humans and statistical models has long been the subject of controversy even though models have demonstrated superior performance in many studies. We propose that relative performance depends on the amount of contextual information available and whether it is distributed symmetrically to humans and models. Given their different strengths, human and statistical predictions can be profitably combined to improve prediction.  相似文献   
999.
A review of the literature suggests that a paucity of information exists regarding how culture-specific issues such as being both Black and gifted influence the psychological needs and personality development of gifted Black students. Stellar attempts, however, are currently underway to develop theories and perspectives of racial identity development among Black students. These theories and perspectives are discussed in an attempt to understand and address the psychological and social needs of gifted Black students.  相似文献   
1000.
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