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   15099篇
  免费   726篇
  国内免费   3篇
  15828篇
  2021年   165篇
  2020年   224篇
  2019年   269篇
  2018年   427篇
  2017年   385篇
  2016年   427篇
  2015年   299篇
  2014年   346篇
  2013年   1317篇
  2012年   569篇
  2011年   621篇
  2010年   374篇
  2009年   334篇
  2008年   503篇
  2007年   448篇
  2006年   408篇
  2005年   328篇
  2004年   339篇
  2003年   318篇
  2002年   297篇
  2001年   490篇
  2000年   473篇
  1999年   324篇
  1998年   151篇
  1997年   121篇
  1996年   115篇
  1995年   116篇
  1992年   245篇
  1991年   243篇
  1990年   250篇
  1989年   247篇
  1988年   244篇
  1987年   206篇
  1986年   203篇
  1985年   205篇
  1984年   186篇
  1983年   132篇
  1982年   132篇
  1979年   169篇
  1978年   105篇
  1975年   145篇
  1974年   163篇
  1973年   186篇
  1972年   166篇
  1971年   147篇
  1970年   129篇
  1969年   137篇
  1968年   183篇
  1967年   137篇
  1966年   147篇
排序方式: 共有10000条查询结果,搜索用时 11 毫秒
101.
102.
The present study examined the similarities between four auditory adaptation techniques to determine whether the effects were correlated. The four adaptation techniques compared were: Simultaneous Dichotic Loudness Balance technique (SDLB; Hood, 1950), Magnitude Estimated Binaural technique (MEB; Botté, Canévet, & Scharf, 1982), Magnitude Estimated Monaural technique, (MEM; Weiler, Sandman, & Pederson, 1981), and the Monaural Reaction Time technique (RT; Davis & Weiler, 1976). Results did not show significant correlations between the four techniques, except (r = 0.39) between MEB and MEM procedures. This correlation was much less than the reliability of the measures would allow (r = 0.98 and r = 0.99, respectively). Thus, it appears that the different methods either produced different adaptation effects or measured different aspects of auditory adaptation. The normal ear apparently shows several forms of adaptation, which reduces the perceptual strength of a continuing stimulus, in favor of an intermittent, less redundant one.  相似文献   
103.
104.
Neuromotor reaction times (simple, choice, and decision) were measured when Thyrotropin-releasing hormone (TRH) was administered intravenously to nine healthy men in a double-blind study. Measurements were made of simple reaction time, choice reaction time, and decision time for each subject at various intervals over a 54-hr. period. Given the observed inherent interaction of the drug with the long time used (54 hr.), most analyses were conducted across separate time epochs. Injected subjects showed inhibition in the normal improvement of simple reaction time (which occurs with practice), and they reduced the time required to make a decision. Choice reaction time, however, remained unchanged across the drug-nondrug experimental conditions.  相似文献   
105.
106.
In this study we combined daily diary data with interview data to investigate individual differences in the impact of stressful daily events on mood. Using a sample of 96 women in an urban community, we examined perceived neighborhood quality and major life events as possibly potentiating the effects of stressful daily events, and we viewed social supports as potentially buffering this daily process. Results confirmed that the presence of chronic ecologic stress (neighborhood perceptions) exacerbated the immediate effects of stressful daily events on mood and also increased the likelihood of enduring effects of daily stressors on next day's mood. Contrary to expectations, previous exposure to major life events decreased the impact of stressful daily events. The availability of social supports, although not buffering the impact of stressful daily events on mood, did mitigate the enduring effects of these events on next day's mood. This study also presents a method for analyzing daily time-series data, while correcting for potential problems of autocorrelated error terms. As such, this study represents a significant advance over previous analytic approaches to time-series data in the study of the stress process.  相似文献   
107.
108.
Optimal timing and the Weber function   总被引:1,自引:0,他引:1  
  相似文献   
109.
110.
Previous research indicates that children from violent marriages are more likely to suffer from conduct problems and/or anxiety disorders than children from nonviolent, satisfactory marriages. However, knowledge regarding specific factors present in violent marriages relating to child problems is limited. The present study examined the relationships involving interspousal aggression, parent-child aggression, and child behavior problems in a sample of 45 children from maritally violent families. Mothers indicated how often their children witnessed interspousal aggression and were victims of parent-child aggression. Mothers also rated their children's problem behaviors while children reported on their own depressive symptoms. The witnessing of interspousal aggression was highly associated with parental aggression directed toward children. Parent-child aggression related to attention problems, anxiety-withdrawl, motor excess, and conduct problems in children. However, the witnessing of interspousal aggression was not significantly related to child behavior problems. These results are consistent with theoretical predictions linking marital problems to child behavior by virtue of their association with parenting.This research was supported in part by a Grant-in-Aid of Research awarded to the first author by Sigma Xi, the Scientific Research Society, and NIMH Grant No. MH35340 awarded to the third author. The authors wish to thank Martha Wray and her staff at VIBS for their help throughout this project.  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