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   6909篇
  免费   371篇
  国内免费   8篇
  2023年   78篇
  2022年   109篇
  2021年   125篇
  2020年   173篇
  2019年   175篇
  2018年   330篇
  2017年   313篇
  2016年   303篇
  2015年   186篇
  2014年   213篇
  2013年   901篇
  2012年   497篇
  2011年   463篇
  2010年   307篇
  2009年   215篇
  2008年   370篇
  2007年   329篇
  2006年   287篇
  2005年   258篇
  2004年   173篇
  2003年   182篇
  2002年   171篇
  2001年   85篇
  2000年   112篇
  1999年   73篇
  1998年   48篇
  1997年   36篇
  1996年   33篇
  1995年   30篇
  1994年   22篇
  1993年   25篇
  1992年   45篇
  1991年   28篇
  1990年   35篇
  1989年   32篇
  1988年   38篇
  1987年   32篇
  1985年   23篇
  1984年   28篇
  1983年   19篇
  1982年   17篇
  1979年   25篇
  1978年   20篇
  1976年   21篇
  1973年   20篇
  1972年   17篇
  1971年   18篇
  1970年   21篇
  1968年   20篇
  1967年   17篇
排序方式: 共有7288条查询结果,搜索用时 359 毫秒
841.
The authors of the theory of reasoned action (TRA) and its extension, the theory of planned behaviour (TPB) recommend that researchers who use these theories to investigate the determinants of a given behaviour should first conduct an elicitation study to identify the modal salient beliefs in the target population. In spite of the importance accorded to salient beliefs by the TRA/TPB, the elicitation stage has received little research attention. This paper reports a detailed analysis of beliefs about “being more physically active in the next 12 months.” A general population sample of 213 adults completed a questionnaire while attending a research centre for a series of tests. The findings showed that the beliefs that were elicited by questions designed to prompt affective outcomes (like or enjoy, dislike or hate) differed systematically from those that were elicited by the traditional questions designed to prompt instrumental out-comes (advantages and disadvantages). Whether this resulted in different final sets of modal salient beliefs was found to depend on the particular decision rule that was employed. An alternative decision rule is proposed, based on maximizing the degree of overlap between the modal set and the full set of salient beliefs generated by the sample. The index of overlap can be used to gauge the adequacy of using a modal set of a given size to represent the salient beliefs of the whole sample. In the current dataset, the optimal modal set for “advantages and disadvantages” was associated with only 26 percent overlap with the salient beliefs of the whole sample, which was judged to be insufficient. In such cases, a better strategy may be to ask participants to generate and rate their own beliefs.  相似文献   
842.
This research note aimed at empirically assessing Lebanese Muslim views of the September 11 attacks. We proposed that young age and political Islam served as significant determinants of support for the attacks. Although we proposed that Sunni Muslim respondents would manifest more support for the attacks than Shi'is, we advanced that socioeconomic conditions should not affect the views of the respondents. The data came from a stratified random sample, consisting of 337 male and female Sunni and Shi'i respondents, conducted in the Greater Beirut area during the months of October and November 2001. The findings sustained the hypotheses that age and political Islam determined approval of the attacks, as well as the hypothesis that socioeconomic conditions did not predict the respondents' views. The results did not sustain the hypothesis that Sunni respondents exceeded Shi'is in their display of support for the attacks.  相似文献   
843.
844.
845.
846.
We examined the relationship between executive functions and both factual and conceptual learning of science, specifically chemistry, in early adolescence. Sixty‐three pupils in their second year of secondary school (aged 12–13 years) participated. Pupils completed tasks of working memory (Spatial Working Memory), inhibition (Stop‐Signal), attention set‐shifting (ID/ED), and planning (Stockings of Cambridge), from the CANTAB. They also participated in a chemistry teaching session, practical, and assessment on the topic of acids and alkalis designed specifically for this study. Executive function data were related to (1) the chemistry assessment which included aspects of factual and conceptual learning and (2) a recent school science exam. Correlational analyses between executive functions and both the chemistry assessment and science grades revealed that science achievements were significantly correlated with working memory. Linear regression analysis revealed that visuospatial working memory ability was predictive of chemistry performance. Interestingly, this relationship was observed solely in relation to the conceptual learning condition of the assessment highlighting the role of executive functions in understanding and applying knowledge about what is learned within science teaching.  相似文献   
847.
Preschoolers are well known for their poor working memory (WM) performance. This could result from goal neglect, which would hamper the setting of maintenance strategies. Previous studies have shown that preschoolers’ WM performance can be improved in game-like tasks, because they provide cues to support goal maintenance. However, in these studies, it was unclear what features of the task (either the main toy or the motor activity required by the game) provide efficient cues. The aim of the present study was to disentangle the two features to examine cue effects in 5- to 7-year-old children. No improvement of WM performance was observed when the toy was a potential goal cue, whereas the motor activity had a detrimental effect in all age groups. The latter effect could result from a distraction of attention from attention-based maintenance activities. Hence, preschoolers' poor WM performance would not be fundamentally due to goal neglect.  相似文献   
848.
849.
850.
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