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   17042篇
  免费   529篇
  国内免费   3篇
  2020年   135篇
  2019年   167篇
  2018年   347篇
  2017年   352篇
  2016年   436篇
  2015年   293篇
  2014年   292篇
  2013年   1484篇
  2012年   706篇
  2011年   736篇
  2010年   320篇
  2009年   343篇
  2008年   516篇
  2007年   467篇
  2006年   471篇
  2005年   1702篇
  2004年   1068篇
  2003年   844篇
  2002年   575篇
  2001年   245篇
  2000年   193篇
  1999年   221篇
  1998年   216篇
  1997年   207篇
  1996年   166篇
  1995年   176篇
  1994年   170篇
  1993年   181篇
  1992年   192篇
  1991年   181篇
  1990年   201篇
  1989年   171篇
  1988年   145篇
  1987年   172篇
  1986年   155篇
  1985年   177篇
  1984年   212篇
  1983年   209篇
  1982年   195篇
  1981年   174篇
  1980年   140篇
  1979年   164篇
  1978年   188篇
  1977年   163篇
  1976年   170篇
  1975年   169篇
  1974年   189篇
  1973年   135篇
  1972年   101篇
  1971年   92篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
21.
22.
23.
The three reliability and two construct validity studies presented here represent the first psychometric research on the commercially successful and popular Hartman Color Code Personality Profile. The reliability studies found high reliability after 3 and 6 weeks. The construct validity studies substantiated that the Color Code assesses some personality traits. The magnitude of the error variance suggests caution, however, in using the Color Code classifications at the individual level.  相似文献   
24.
It is widely assumed that reinforcers are biologically relevant stimuli, or stimuli that have been associated with biologically relevant stimuli. However, brief, arbitrary stimuli have also been reported to have reinforcement-like effects, despite being unrelated to biologically relevant stimuli like food. The present study explored the potential reinforcement-like effects of brief stimuli across 5 experiments. In Experiments 1 through 4, pigeon subjects responded for food reinforcement and brief stimulus presentations in a 2-component multiple schedule. Neither baseline response rates nor resistance to change during disruption tests were systematically greater in a component with versus without brief stimulus presentations. Increasing the rate and duration of brief stimulus presentations in Experiment 4 did not reveal reinforcement-like effects when compared directly with food. In Experiment 5, pigeons chose between independent terminal links in a concurrent-chains procedure. Across conditions, varying the location, duration, and rate of brief stimulus presentations in the terminal links had no systematic effects on preference. In contrast, varying rates of food reinforcers resulted in large and reliable shifts in preference. Therefore, the present study found no systematic evidence that brief stimuli unrelated to food reliably increase response rates, resistance to change, or preference. These data demonstrate the value of systematic replication, and a behavioral momentum approach to assessing potential reinforcement-like effects.  相似文献   
25.
26.
27.
This study evaluated cardiovascular responses (CVR) to an active speech task with blatantly discriminatory (BRC) versus neutral (NRC) stimuli and an anger recall task in a sample of Black men (N = 73; age 18 to 47). Diastolic blood pressure scores were higher for NRC versus BRC stimuli during anger recall (p = .05). Moreover, persons in the NRC group who perceived high levels of racism (vs. no racism or BRC group) during active speech showed larger increases in blood pressure across postspeech rest, anger recall, and subsequent rest (p = .03). The notable elevation in CVR in response to an ambiguous event extends current models of racism suggesting that subtle racism is a psychosocial stressor that erodes health through chronically elevated CVR.  相似文献   
28.
29.
30.
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