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   58232篇
  免费   1533篇
  国内免费   15篇
  2020年   459篇
  2019年   571篇
  2018年   4035篇
  2017年   3447篇
  2016年   2941篇
  2015年   774篇
  2014年   784篇
  2013年   3152篇
  2012年   1826篇
  2011年   3578篇
  2010年   3203篇
  2009年   2215篇
  2008年   2806篇
  2007年   3255篇
  2006年   1098篇
  2005年   1143篇
  2004年   1051篇
  2003年   930篇
  2002年   914篇
  2001年   1215篇
  2000年   1201篇
  1999年   921篇
  1998年   417篇
  1997年   406篇
  1996年   371篇
  1995年   360篇
  1993年   359篇
  1992年   764篇
  1991年   666篇
  1990年   731篇
  1989年   622篇
  1988年   661篇
  1987年   616篇
  1986年   612篇
  1985年   559篇
  1984年   513篇
  1983年   495篇
  1979年   591篇
  1978年   404篇
  1977年   353篇
  1975年   462篇
  1974年   510篇
  1973年   537篇
  1972年   409篇
  1971年   404篇
  1970年   360篇
  1969年   417篇
  1968年   491篇
  1967年   442篇
  1966年   366篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
901.
902.
903.
The efficacy of immediate tangible reinforcement in increasing appropriate visual attending for entire classes of deaf children was examined. The subjects were three classes (seven children each) in a residential school for the deaf. Boxes were installed on each child's desk, with lights that were flashed immediately contingent upon 10 sec of visual attending. Light flashes were backed up by M & M's, cereal bits, or tokens. In two of the classes, extinction sessions were also scheduled. For all classes, the reinforcement procedure increased visual attending by 50% or more, maintaining it at rates above 82%. Withdrawal of tangibles decreased attending back to baseline levels. The results support analysis of attending as operant behavior and demonstrate the applicability of reinforcement procedures in modifying these behaviors for young deaf children in a classroom setting.  相似文献   
904.
The effect of reinforcement dependent on the social responses of two severely retarded withdrawn children was investigated. During 30 training sessions (30 min each) food and praise were administered dependent upon the children's mutual participation in a ball-rolling and block-passing task. Both children showed a progressive increase in social interaction in a non-training situation during this reinforcement period. After the reinforcement procedures were removed, social behavior decreased markedly. Response generalization to children not involved in training occurred.  相似文献   
905.
The attendance rates of welfare recipients at self-help group meetings was compared when supplementary reinforcement was given for attending and when it was not. Reinforcers included donated items, such as clothing and household goods, and information about welfare services. It was found that the attendance at meetings averaged three recipients per meeting without reinforcement and 15 recipients per meeting with reinforcement. There was evidence that attendance was associated with participation in other self-help activities. It was concluded that practical forms of reinforcement can be found to maintain the participation of severely disadvantaged populations in self-help groups.  相似文献   
906.
907.
908.
909.
910.
This study examined the relationship between elation-depression and desire for excitement on both intra- and interindividual levels. It was hypothesized that there would be a positive linear relationship between elation and desire for tranquillity These intraindividual hypotheses received strong support. This support would suggest that radical incongruities between activity demands and mood preparedness are often painful and would imply that in order for mood alteration to be successful it must take place gradually It was also hypothesized that characteristic level of elation-depression would be positively related to mean ratings of desire for excitement, positively related to score on a desire for excitement test, and negatively related to mean ratings of desire for tranquillity These interindividual hypotheses were not supported. Although it is probably most reasonable to accept the lack of correspondence between intra- and interindividual results, the operation of social comparison effects and social desirability bias may have obscured the predicted interindividual relationships  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