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   17444篇
  免费   829篇
  国内免费   15篇
  2020年   231篇
  2019年   249篇
  2018年   366篇
  2017年   367篇
  2016年   382篇
  2015年   293篇
  2014年   326篇
  2013年   1385篇
  2012年   586篇
  2011年   670篇
  2010年   384篇
  2009年   361篇
  2008年   488篇
  2007年   473篇
  2006年   409篇
  2005年   350篇
  2004年   357篇
  2003年   338篇
  2002年   340篇
  2001年   708篇
  2000年   706篇
  1999年   469篇
  1998年   189篇
  1997年   182篇
  1996年   144篇
  1995年   144篇
  1993年   144篇
  1992年   365篇
  1991年   331篇
  1990年   352篇
  1989年   345篇
  1988年   325篇
  1987年   294篇
  1986年   313篇
  1985年   304篇
  1984年   243篇
  1983年   211篇
  1979年   201篇
  1978年   170篇
  1977年   137篇
  1975年   199篇
  1974年   253篇
  1973年   204篇
  1972年   203篇
  1971年   171篇
  1970年   154篇
  1969年   199篇
  1968年   206篇
  1967年   164篇
  1966年   184篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
971.
972.
Growing efforts have been made to pool coronavirus data and control measures from countries and regions to compare the effectiveness of government policies. We examine whether these strategies can explain East Asia’s effective control of the COVID‐19 pandemic based on time‐series data with cross‐correlations between the Stringency Index and number of confirmed cases during the early period of outbreaks. We suggest that multidisciplinary empirical research in healthcare and social sciences, personality, and social psychology is needed for a clear understanding of how cultural values, social norms, and individual predispositions interact with policy to affect life‐saving behavioural changes in different societies.  相似文献   
973.
Cognitive Processing - A correction to this paper has been published: https://doi.org/10.1007/s10339-021-01027-4  相似文献   
974.
975.
Behavioral training techniques of direct care staff have helped institutions serving dependent populations to progress from custodial settings to therapeutic environments. Most of the recent literature on staff training has focused on contingency management procedures, especially feedback procedures. Long-term studies of these procedures suggest that individual verbal feedback on the performance of the staff member is the best assurance of maintenance of these procedures.  相似文献   
976.
The present study examines the perceived causes of date rape by the use of network analysis. The 142 subjects in the study were presented with grids containing 9 causes listed by row and column. They were asked to indicate if they belived there was a causal link between each of the 72 causal pairings. The resulting network placed emphasis on male and female drunkenness, norms of dating, and society's attitude to date rape as distal causes of date rape. Misunderstanding of behavior by men, male attitude that date rape is unimportant, and need by males for dominance were seen as proximal causes. Further networks for each sex were constructed: these showed clear division of opinion on the causes of date rape. © 1995 Wiley-Liss, Inc.  相似文献   
977.
A screening decision is about whether a candidate fails to meet a decision maker's criteria and must be rejected, or whether it meets the criteria and can be accepted. Image theory contends that screening decisions are based on a simple, noncompensatory process that focuses solely upon the candidate's negative attributes. This contention has received empirical support in a job screening context in which students role-played a hypothetical person seeking a job. But how robust is image theory's prediction? The present work was done in the context of professional auditors screening prospective clients. The client screening context is a particularly interesting setting to test the implications of image theory. If auditors reject clients with negative attributes, as predicted by image theory, this will indicate that some clients are being denied access to a socially useful service. Further, auditors can accept prospective clients with negative attributes and simply adjust the audit plan and fees to compensate for the client's riskiness. Thus, it is not clear that the preliminary findings obtained in a job screening context will generalize to the audit context. On the other hand, results consistent with the image theory prediction would suggest a robust theory. Even in the client screening context, where auditors used their own criteria to screen prospective clients, we found overwhelming support for image theory's view of screening. The results indicate the potential payoffs of image theory as a robust framework to address audit and other substantive problems. Implications of a noncompensatory, negative oriented, client screening strategy are discussed.  相似文献   
978.
Assertive behaviours like showing-off have an important role for a child in getting attention from other children in a class without being aggressive. This study presented the showing-off behaviour in an English nursery school, and later it was discussed in comparison with that in the German kindergartens reported by Hold-Cavell. As a result, the English children performed showing-off behaviours at only one-half the frequency of German children. No sex difference was seen in either showing-off or physical aggression in the nursery class. The frequency of showing-off did not correlate with that of physical aggression; this result is discussed in terms of Hinde's motivational postulate. Showing-off behaviour is deserving of the further studies cross-culturally and onto-genetically.  相似文献   
979.
980.
Selective breeding of wild rats over many generations on the basis of low or high defensive threat and attack to human approach and contact has produced highly polarized “domesticated” and “wild-type” animals. Because the selection procedure selectively involves these two defense patterns, and these clearly differ in the two groups, it is of interest to determine if other, nonselected, defensive behaviors to threat stimuli also change. “Domesticated” and “wild-type” rats of the thirty-fifth generation were run in a fear defense test battery (F/DTB) to systematically evaluate defensive behaviors to a variety of present threat stimuli. “Domesticated” rats showed reduced avoidance and slower flight speed to an approaching experimenter, reduced jump/startle response to handelap and dorsal contact, less vocalization and boxing to vibrissae stimulation or to an anesthetized conspecific, and reduced defensiveness to an attempted pickup by the experimenter. These results indicate that selective bi-directional breeding for defensive threat and attack to human approach and contact produces group differences in a variety of defensive behaviors, and in defensiveness to stimuli other than those on which the selection was based. © 1994 Wiley-Liss, Inc.  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