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   77024篇
  免费   3021篇
  国内免费   31篇
  80076篇
  2020年   845篇
  2019年   998篇
  2018年   1368篇
  2017年   1426篇
  2016年   1490篇
  2015年   1105篇
  2014年   1295篇
  2013年   6322篇
  2012年   2436篇
  2011年   2446篇
  2010年   1487篇
  2009年   1534篇
  2008年   2151篇
  2007年   2073篇
  2006年   1886篇
  2005年   1631篇
  2004年   1639篇
  2003年   1600篇
  2002年   1558篇
  2001年   2395篇
  2000年   2265篇
  1999年   1691篇
  1998年   824篇
  1997年   727篇
  1996年   781篇
  1995年   720篇
  1992年   1483篇
  1991年   1375篇
  1990年   1353篇
  1989年   1310篇
  1988年   1252篇
  1987年   1199篇
  1986年   1217篇
  1985年   1299篇
  1984年   1078篇
  1983年   957篇
  1981年   738篇
  1979年   1130篇
  1978年   839篇
  1977年   720篇
  1975年   957篇
  1974年   1070篇
  1973年   1115篇
  1972年   961篇
  1971年   911篇
  1970年   804篇
  1969年   831篇
  1968年   1032篇
  1967年   949篇
  1966年   899篇
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
951.
Previous cross-sectional field and laboratory research has provided mixed results as to whether recruiter characteristics and behaviors influence applicant reactions to employment opportunities. The present research was conducted to examine the effect of recruiter characteristics using a pre-post study design in a naturally occurring setting. In addition, the effects of several potential moderators on recruiter influence were tested. Results indicated that recruiter characteristics had an impact on perceived job attributes, regard for job and company, and likelihood of joining the company. There was little evidence that the effect of recruiter characteristics was moderated by selected applicant, job, or interviewer variables.  相似文献   
952.
953.
Analysis of elbow-extension movements, executed at maximal velocity, show positive correlations of timing of agonist-antagonist EMG activity with both movement velocity and displacement. Results indirectly support the notion that the antagonist musculature provides a braking force to arrest rapid limb movements.  相似文献   
954.
Structural damage to the amygdala severely retards delayed cross-modal (tactile-to-sight) matching in primates. Conversely, we hypothesized that people who display signs suggestive of specific temporal lobe lability should show enhanced delayed cross-modal matching performance. The hypothesis was supported. In a single experiment involving 25 subjects, significant negative correlations obtained between the numbers of errors on the cross-modal matching task and numbers of affirmative responses within clusters of items that contained themes of meaningfulness, religious beliefs or ictal, complex partial epileptic (limbic) states. On the other hand, the numbers of errors were not significantly correlated with either clusters of control items or items that are presumed to reflect the function of other temporal-lobe structures. Both matching and questionnaire data were collected under double-blind conditions.  相似文献   
955.

Two experiments investigated the role of lithium-mediated environmental conditioning on instrumental performance. Experiment 1 demonstrated that a novel taste consumed in one arm of a T maze prior to lithium-induced toxicosis reduced performance in this environment whereas similar aversions conditioned in the home cage failed to alter maze performance. Experiment 2 showed that maze performance in a straight alleyway was decremented during extinction only in a group that actually traversed the alley prior to drinking saccharin and receiving lithium injections. This demonstrated that the instrumental decrement observed in Experiment 1 was due not only to the presence of an unpalatable flavor in the goalbox during the test.

  相似文献   
956.

Galef and his colleagues have repeatedly shown that one rat may transfer information regarding the type of food it has consumed to other conspecifics. Such experiments typically have been conducted in wire-mesh cages or a wooden maze. The present experiments sought to extend this paradigm to the open-field foraging situation having six food patches to choose from. Following interaction with a demonstrator that had consumed either a cocoa or a cinnamon diet, single observers (Experiment 1) were tested in the foraging situation. Food-consumption scores indicated that observers consumed significantly more of their specific demonstrator’s diet than a second diet that was available also. Experiment 2 involved the simultaneous testing of two observers in the foraging laboratory. In Experiment 3 two observers were once again tested, but each had been provided a different food-type message prior to foraging. Positive results, mirroring those of Experiment 1, were obtained in both Experiments 2 and 3. The results of these three experiments underscore the robustness of this phenomenon and its generalizability to other testing conditions.

  相似文献   
957.
Book Notes     
The Psychological Record -  相似文献   
958.
Optimal timing and the Weber function   总被引:1,自引:0,他引:1  
  相似文献   
959.
A psychomotor stimulant theory of addiction   总被引:64,自引:0,他引:64  
  相似文献   
960.
A model for stimulus generalization in Pavlovian conditioning   总被引:2,自引:0,他引:2  
  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