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   4512篇
  免费   53篇
  国内免费   6篇
教育   2992篇
科学研究   510篇
各国文化   21篇
体育   370篇
综合类   8篇
文化理论   57篇
信息传播   613篇
  2023年   25篇
  2022年   32篇
  2021年   41篇
  2020年   78篇
  2019年   112篇
  2018年   207篇
  2017年   225篇
  2016年   200篇
  2015年   127篇
  2014年   164篇
  2013年   753篇
  2012年   142篇
  2011年   158篇
  2010年   157篇
  2009年   112篇
  2008年   102篇
  2007年   133篇
  2006年   81篇
  2005年   85篇
  2004年   84篇
  2003年   71篇
  2002年   60篇
  2001年   102篇
  2000年   88篇
  1999年   74篇
  1998年   57篇
  1997年   47篇
  1996年   55篇
  1995年   29篇
  1994年   37篇
  1993年   25篇
  1992年   48篇
  1991年   49篇
  1990年   33篇
  1989年   40篇
  1988年   37篇
  1987年   34篇
  1986年   36篇
  1985年   42篇
  1984年   39篇
  1983年   23篇
  1982年   35篇
  1981年   26篇
  1980年   18篇
  1979年   35篇
  1978年   29篇
  1977年   23篇
  1974年   24篇
  1972年   26篇
  1971年   18篇
排序方式: 共有4571条查询结果,搜索用时 218 毫秒
91.
The purpose of the study was to assess adolescents’ participation in various socio-digital activities by using a self-report questionnaire, a social networking questionnaire, and interviews. The participants (n?=?253) were grade 6–9 students from a multicultural lower-secondary school in Finland. Three profiles of socio-digital participation were identified: friendship oriented basic participators (n?=?161), gaming-oriented participators (n?=?61), and creative participators (n?=?31) intensively engaged in diverse socio-digital practices. The analyses revealed systematic differences in social networking relations as a function of adolescents’ social-digital participation profile and gender. The reciprocal values in hanging out, liking, and media multiplexity were highest for creative participators, whereas gaming-oriented participators were less socially active than their peers. The socio-digital expertise of creative participators was socially recognized by a larger group of peers than that of the other groups. The study produces methodological tools suitable for collecting systematic longitudinal data of socio-digital practices of larger groups of adolescents in future.  相似文献   
92.
93.
94.
Two experiments were performed to determine the effect of sample duration (0.1, 2, and 4 sec), delay interval (.03, 4, 8, 16, and 32 sec), and type of stimulus (color and shape) on the matching performance of rhesus monkeys. In Experiment 1, the 15 possible delay-duration combinations were randomly presented in blocks of 15 trials. In Experiment 2, each duration was held constant and the five delays randomly presented. Then each delay interval was held constant with the three durations randomly varied. Matching performance increased as sample duration increased (ps < .01 and .005), while length of delay did not significantly affect performance. The type of stimuli paired in the matching test significantly affected performance (ps < .05 and .10) with the shape/shape choices leading to the poorest performance. Stimulus discriminability and amount of training with brief sample durations were implicated as significant determinants of matching performance.  相似文献   
95.
A Erreich  V Valian 《Child development》1979,50(4):1071-1077
4 locative categories were investigated to determine whether their examples were organized according to the prototype/nonprototype distinction. A ranking task was presented to 30 adult subjects to see whether they would judge those instances which had been designated as prototypes by the experimenter to be the best exemplars of each category. An elicited-drawing task was administered to see whether there was a preference for drawing adult-designated prototypical instances. A matching task was presented to determine whether fewer errors would occur in response to adult-designated prototypical instances. The latter 2 tasks were presented to 4-year-olds, 6-year-olds, and adults, with 17 subjects in each group. The results provide strong evidence of prototype/nonprototype organization in 3 of the locative categories and weak evidence in the fourth. Tentative conclusions regarding the development of such organization are drawn.  相似文献   
96.
97.
98.
99.
100.
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