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   27456篇
  免费   1081篇
  国内免费   9篇
  2020年   281篇
  2019年   293篇
  2018年   469篇
  2017年   494篇
  2016年   516篇
  2015年   376篇
  2014年   482篇
  2013年   2165篇
  2012年   737篇
  2011年   781篇
  2010年   518篇
  2009年   488篇
  2008年   742篇
  2007年   686篇
  2006年   631篇
  2005年   521篇
  2004年   539篇
  2003年   545篇
  2002年   527篇
  2001年   669篇
  2000年   703篇
  1999年   531篇
  1998年   279篇
  1997年   293篇
  1996年   289篇
  1992年   501篇
  1991年   462篇
  1990年   453篇
  1989年   426篇
  1988年   442篇
  1987年   411篇
  1986年   453篇
  1985年   428篇
  1984年   385篇
  1983年   341篇
  1981年   271篇
  1979年   411篇
  1978年   332篇
  1977年   288篇
  1976年   297篇
  1975年   347篇
  1974年   434篇
  1973年   466篇
  1972年   351篇
  1971年   376篇
  1970年   345篇
  1969年   366篇
  1968年   438篇
  1967年   405篇
  1966年   422篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
951.
952.
953.
954.
955.
We examined self- and cross-citation practices in JABA and JEAB from 1983 through 1992. Mean levels of self-citation for JABA and for JEAB were 22.6% and 36.1%, respectively. Overall, 2.4% of JABA citations were JEAB articles, and 0.6% of JEAB citations were JABA articles, which suggests limited integration of basic and applied research.  相似文献   
956.
The debate over social acceptability of intrusive procedures has led some school districts to adopt policies allowing punishment for only the most extreme forms of destructive behavior. We investigated the effectiveness of selectively implementing punishment for only the most severe topographies of aggression and property destruction, while less extreme behaviors were ignored. Results indicated that severe behaviors were reduced to near-zero levels only when both severe and less severe behaviors were similarly punished.  相似文献   
957.
We investigated whether variations in alertness among individuals with profound multiple disabilities affected subsequent responsiveness to training programs. Three experiments were conducted involving 5 people. In Experiment 1, results indicated that alertness of 3 individuals increased with provision of skill-acquisition training programs. Results also indicated no predictive relationship between alertness levels prior to training and subsequent responsiveness to training. Experiment 2 replicated results of Experiment 1 with 2 participants from Experiment 1 and an additional participant. Results of Experiment 2 also indicated that the increased alertness levels accompanying provision of training were not a function of the participants simply being in an inactive environment prior to training. Results of Experiment 3 indicated that alertness of an additional participant increased through provision of another training intervention, involving a systematic preference assessment. Responses during the preference assessment appeared to be unrelated to previously existing alertness levels. These findings suggest the need for caution when considering the withholding of scheduled training because an individual appears to be nonalert.  相似文献   
958.
959.
A case study is presented of the treatment of a woman who had suffered from claustrophobia for over 13 years, by cotherapists using a combination of desensitization and flooding techniques. By assuming specific roles, the therapists expedited the therapeutic process to a successful conclusion in a brief period of time.  相似文献   
960.
Five experiments are reported in which the effect of partial visual feedback on the accuracy of discrete target aiming was investigated. Visual feedback was manipulated through a spectacle-mounted liquid-crystal tachistoscope. The length of the visual feedback interval was varied as a percentage of the instructed movement time. In Experiment 1, the length of the vision interval was manipulated symmetrically at the beginning- and end-phase of the movement, whereas in the remaining experiments, the vision time was varied with respect to the end-phase only. The variations at the end were examined for different distances (Experiment 2), different movement speeds at the same distance (Experiment 3), and in small interstep intervals (Experiment 4). A vision time of more than 150 ms at the end-phase of the movement enhanced aiming performance in all experiments. Longer vision times monotonously improved aiming accuracy; the fifth experiment showed that a vision time of about 275 ms was sufficient for near-perfect aiming. Furthermore, the significance of vision during the first phase of a movement was demonstrated again. The results of the five experiments pointed to shorter visuomotor processing times. To explain the beneficial effects of short vision times for aiming accuracy, we propose a model of visuomotor processing that is based on the stochastic optimized submovement model of Meyer, Abrams, Kornblum, Wright, and Smith (1988).  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