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   44468篇
  免费   1925篇
  国内免费   31篇
  2020年   496篇
  2019年   581篇
  2018年   828篇
  2017年   776篇
  2016年   883篇
  2015年   605篇
  2014年   755篇
  2013年   3391篇
  2012年   1425篇
  2011年   1373篇
  2010年   857篇
  2009年   896篇
  2008年   1191篇
  2007年   1223篇
  2006年   1087篇
  2005年   976篇
  2004年   929篇
  2003年   831篇
  2002年   879篇
  2001年   1587篇
  2000年   1588篇
  1999年   1153篇
  1998年   469篇
  1997年   446篇
  1995年   433篇
  1992年   932篇
  1991年   876篇
  1990年   876篇
  1989年   797篇
  1988年   775篇
  1987年   722篇
  1986年   700篇
  1985年   747篇
  1984年   631篇
  1983年   578篇
  1982年   447篇
  1979年   661篇
  1978年   478篇
  1977年   432篇
  1976年   433篇
  1975年   526篇
  1974年   641篇
  1973年   667篇
  1972年   552篇
  1971年   504篇
  1970年   447篇
  1969年   487篇
  1968年   591篇
  1967年   527篇
  1966年   486篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
41.
Book reviews     
TOATES, F. Animal Behaviour: A Systems Approach. Chichester: John Wiley and Sons. 1980. Pp. 299. Hardback £17. Paper back £6.40 ISBN 0 471 27724.

DICKINSON, A. Contemporary Animal Learning Theory. Cambridge: University Press. 1980. Pp. 177. Hardback £12.50. Paperback £3.95. ISBN 0 521 23469 7.  相似文献   
42.
This study examined the contributions of several important domains of functioning to attention‐deficit/hyperactivity disorder (ADHD) symptoms and conduct problems. Specifically, we investigated whether cognitive inhibition, emotion regulation, emotionality, and disorganized attachment made independent and specific contributions to these externalizing behaviour problems from a multiple pathways perspective. The study included laboratory measures of cognitive inhibition and disorganized attachment in 184 typically developing children (M age = 6 years, 10 months, SD = 1.7). Parental ratings provided measures of emotion regulation, emotionality, and externalizing behaviour problems. Results revealed that cognitive inhibition, regulation of positive emotion, and positive emotionality were independently and specifically related to ADHD symptoms. Disorganized attachment and negative emotionality formed independent and specific relations to conduct problems. Our findings support the multiple pathways perspective on ADHD, with poor regulation of positive emotion and high positive emotionality making distinct contributions to ADHD symptoms. More specifically, our results support the proposal of a temperamentally based pathway to ADHD symptoms. The findings also indicate that disorganized attachment and negative emotionality constitute pathways specific to conduct problems rather than to ADHD symptoms.  相似文献   
43.
Although a great deal of research has been conducted on the relationship between social support and physical health, the contribution of personality characteristics to this relationship has rarely been assessed. Structural equation modeling was employed to derive and test a model of the direct and indirect relationships between personality characteristics, social network size, the perceived availability of support, socially supportive behaviors, and perceived physical health with a sample of Pennsylvania adults. Significant paths indicate that individuals who perceive themselves as affiliative and as help seekers and help givers report larger social networks, receive more socially supportive behaviors, and perceive that more support is available to them. The perception that support is available shared a direct relationship with perceived physical health. The utility of including multiple measures of social support and personality characteristics related to receiving support in investigations of the relationship between social support and physical health is discussed.  相似文献   
44.
45.
46.
47.
48.
49.
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