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   20644篇
  免费   14篇
  2024年   3篇
  2021年   9篇
  2019年   5篇
  2018年   3489篇
  2017年   2818篇
  2016年   2248篇
  2015年   195篇
  2014年   82篇
  2013年   90篇
  2012年   570篇
  2011年   2386篇
  2010年   2519篇
  2009年   1468篇
  2008年   1703篇
  2007年   2173篇
  2006年   32篇
  2005年   218篇
  2004年   171篇
  2003年   108篇
  2002年   67篇
  2001年   35篇
  2000年   60篇
  1999年   16篇
  1998年   24篇
  1997年   17篇
  1996年   13篇
  1995年   5篇
  1993年   4篇
  1992年   5篇
  1991年   3篇
  1990年   12篇
  1989年   3篇
  1988年   6篇
  1987年   7篇
  1986年   5篇
  1984年   6篇
  1983年   6篇
  1982年   5篇
  1981年   7篇
  1980年   3篇
  1979年   8篇
  1978年   3篇
  1977年   3篇
  1976年   5篇
  1974年   4篇
  1973年   5篇
  1971年   5篇
  1970年   4篇
  1969年   6篇
  1967年   4篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
41.
A within-subject comparison was made of the effects of methylphenidate (Ritalin) and response cost in reducing the off-task behavior of two boys, 7 and 8 years of age, who had been diagnosed as having an attentional deficit disorder with hyperactivity. Several dosages of Ritalin (5 to 20 mg/day) were evaluated with the results indicating varying effects of the drug for both children. Response cost (with free-time as the reinforcer) was superior to Ritalin in raising levels of on-task behavior and in improving academic performance.  相似文献   
42.
One-hundred and twenty-five families in the Medicaid Early Periodic Screening, Diagnosis and Treatment Program were assigned to one of five treatments to encourage parents to obtain health care service following the dental screening of their children: (a) a control procedure, in which parents were given a dentist's name; (b) a multiple contact procedure, in which parents received a postcard and two telephone call reminders; (c) a problem-solve procedure, in which a social worker aide conducted a brief session with the parent; (d) an incentive procedure, in which parents selected among four gifts that were contingent on seeking care; (e) an incentive + problem-solve procedure, in which the latter two treatments were combined. The multiple contact, incentive, and incentive + problem-solve techniques were significantly more effective in initiating dental visits than the control procedures. Families assigned to the intensive strategies were most likely to complete treatment. A cost-efficiency analysis showed the multiple contact technique to be a low-cost and highly effective procedure.  相似文献   
43.
Open classrooms with few rules, individualized instruction, and informal class organization present new problems for the application of behavior principles. The effects of three types of teacher aides on student achievement and on-task behavior were studied. Each was compared with a standard no-aide condition. Subjects were 54 third graders in two "open"-style classrooms. The three types of aide, helping adult, disciplinary adult, and helping fifth-grade aide, were compared in a multi-element design with a no-aide control. The helping-adult aide significantly affected the academic output of the class, when compared with the no-aide condition. All aide conditions produced more academic work and on-task behavior than did the standard no-aide condition.  相似文献   
44.
Three classes of second graders served as subjects in this study of the effects of two types of intervention programs upon stealing: (1) an antistealing lecture with no specific contingency implied, and (2) a direct group contingency applied, whereby children were rewarded with (a) extra free time for no thefts, (b) allowed normal free time if stolen items were returned, and (c) punished with loss of free time if stolen items were not returned. A multiple-baseline design across the three classes showed the group contingency to be effective in reducing stealing behavior; the anti-stealing lecture was ineffective.  相似文献   
45.
46.
47.
48.
49.
50.
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