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   801篇
  免费   37篇
  2020年   13篇
  2019年   11篇
  2018年   15篇
  2017年   11篇
  2016年   14篇
  2015年   8篇
  2013年   86篇
  2012年   24篇
  2011年   21篇
  2010年   13篇
  2009年   19篇
  2008年   26篇
  2007年   25篇
  2006年   12篇
  2005年   22篇
  2004年   17篇
  2003年   27篇
  2002年   27篇
  2001年   10篇
  2000年   14篇
  1999年   17篇
  1997年   9篇
  1996年   11篇
  1994年   7篇
  1993年   8篇
  1992年   8篇
  1991年   9篇
  1990年   7篇
  1989年   7篇
  1988年   11篇
  1987年   11篇
  1986年   10篇
  1985年   8篇
  1984年   9篇
  1983年   15篇
  1982年   19篇
  1980年   16篇
  1979年   16篇
  1978年   17篇
  1977年   16篇
  1976年   18篇
  1975年   12篇
  1974年   17篇
  1973年   15篇
  1972年   12篇
  1971年   16篇
  1970年   12篇
  1969年   7篇
  1968年   12篇
  1967年   14篇
排序方式: 共有838条查询结果,搜索用时 265 毫秒
131.
132.
A 1-year experimental program that transported a total of 38 “volunteer” disadvantaged city children to schools in a nearby suburban community was evaluated in grades 1 and 2. Twenty-six of the 38 children were in a total of 12 different classes at these two grade levels. At the conclusion of the program, transported first graders displayed significantly higher average gains in reading, mathematics, and listening skills than did counterparts who remained in the city school. Among second graders, achievement mean gains for the transported group did not differ significantly from those of the counterpart group. Suburban children in classes containing city youngsters displayed no measured detrimental effects on achievement, when compared to similar classes without city children. In general, year-end affective measures indicated that most groups of students preferred integrated classes that were mostly white, and they also felt these classes were among the smartest.  相似文献   
133.
134.
Reinforcement strengths of different intensities of brain stimulation were assessed by means of a two-member behavioral chain. A variable interval schedule of 30 sec was the first-member, and five lever presses, each rewarded with stimulation, was the second. It was found that response rate on the VI schedule continued to increase beyond the intensity value which produced peak rate on the second-member, self-stimulation lever. It was concluded (1) that brain-stimulation reinforcement strength cannot be assessed adequately by means of self-stimulation rate, and (2) the chaining technique employed in the present experiment appears promising as an analytical tool in brain-stimulation research. Finally, some aspects of the data suggested a fatigue or stimulation-adaptation phenomenon.  相似文献   
135.
The effect of CER on DRL 16 was studied in four rats. All Ss showed complete CER suppression after five CER trials, together with some unconditioned post-shock suppression. This post-shock suppression showed complete recovery in all Ss after 10 days of five CER trials per day, but complete CER suppression continued throughout.  相似文献   
136.
This paper develops and tests a framework for understanding the relative importance and predictive efficacy of commitment to one’s profession, organization, supervisor and job in both standard and fixed-term employment arrangements. Drawing from the commitment and employment arrangement literatures, we test a set of hypotheses identifying distinct patterns of commitments (i.e., commitment profiles) to these four targets that should yield desired work-related outcomes in standard and fixed-term employment arrangements. We test our hypotheses using latent profile analysis on data collected from two Finnish universities (N1 = 235, N2 = 233). A high macro profile, characterized by high commitment to profession, organization and job, and moderate commitment to supervisor, emerged for employees in standard employment relationships, and this profile was associated with significantly higher positive work behaviours and work effort and lower turnover intentions than the other profiles. For employees with fixed-term employment contracts, a high cosmopolitan profile emerged, characterized by high commitment to the profession and job and low commitment to the organization and supervisor. For these employees, this profile was associated with positive work behaviours and work effort comparable to the high macro profile. Implications for theory, research and practice are discussed.  相似文献   
137.
138.
139.
140.
Efforts to reduce intimate partner violence in sub‐Saharan Africa generally approach the issue through the lens of women's empowerment. These efforts include foci on women's relative power in the relationship, educational background, and earning potential. The social status of men has largely been ignored, reducing the potential to involve them in efforts to demote intimate partner violence. In this study we consider whether a man's perceived social status predicts conflict tactics, and whether these tactics are mediated by loneliness and collective self‐esteem from a community‐based sample in semi‐rural Kenya (n = 263). We find that men who reported lower perceived social status also reported significantly more frequent violent conflicts with their intimate partners. This association was significantly, and completely, mediated by lower collective self‐esteem and higher loneliness. There was no direct association between subjective social status and negotiation‐based conflict tactics, although there was an indirect association. Men with higher perceived social status reported higher collective self‐esteem, and men with higher collective self‐esteem reported more negotiation‐based conflict tactics. These findings inform efforts to reduce intimate partner violence by involving men, showing potential to reduce violence by building self‐esteem among men—particularly those with lower perceived social status.  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