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   4777篇
  免费   234篇
  国内免费   3篇
  2024年   10篇
  2023年   58篇
  2022年   70篇
  2021年   115篇
  2020年   123篇
  2019年   148篇
  2018年   218篇
  2017年   228篇
  2016年   178篇
  2015年   134篇
  2014年   158篇
  2013年   658篇
  2012年   358篇
  2011年   330篇
  2010年   220篇
  2009年   133篇
  2008年   295篇
  2007年   249篇
  2006年   220篇
  2005年   158篇
  2004年   116篇
  2003年   104篇
  2002年   97篇
  2001年   41篇
  2000年   69篇
  1999年   51篇
  1998年   30篇
  1997年   24篇
  1996年   23篇
  1995年   22篇
  1994年   31篇
  1993年   14篇
  1992年   20篇
  1991年   28篇
  1990年   22篇
  1989年   22篇
  1988年   16篇
  1987年   17篇
  1986年   11篇
  1985年   12篇
  1984年   14篇
  1983年   9篇
  1982年   10篇
  1981年   10篇
  1979年   12篇
  1975年   9篇
  1973年   12篇
  1971年   11篇
  1969年   8篇
  1968年   12篇
排序方式: 共有5014条查询结果,搜索用时 0 毫秒
101.
Science and Engineering Ethics - This work describes the perceptions that Industrial Engineering students have regarding Colombian firms’ corporate social responsibility (CSR) practices. It...  相似文献   
102.
Social Psychology of Education - In Chile, a vast and persistent gender gap in math performance at university admission has negative consequences for women’s opportunities. International...  相似文献   
103.
Animal Cognition - Rescue behavior is considered a type of pro-social response, defined as a voluntary action directed to benefit another individual who is in a stressful or dangerous situation. In...  相似文献   
104.
Animal Cognition - Across mammals, increased body size is positively associated with lifespan. However, within species, this relationship is inverted. This is well illustrated in dogs (Canis...  相似文献   
105.
Attention, Perception, & Psychophysics - Learning and imitating a complex motor action requires to visually follow complex movements, but conscious perception seems too slow for such tasks....  相似文献   
106.
107.
Normal language development was studied in 310 pairs of 4-year-old twins born in the United Kingdom in 1994. Twins were assessed individually in their homes on a diverse battery of language and nonverbal measures. Rotated factor analyses indicated the presence of a general Language factor (L) as well as a general Nonverbal (NV) factor. Moderate genetic influence was found for both L and NV abilities. Bivariate genetic analysis estimated a genetic correlation of .63 between L and NV abilities, implying that over half of the genetic influence on L overlaps with genetic influence on NV. These results suggest that at age 4, genetic influences on individual differences in language overlap substantially with genetic influences on individual differences in other cognitive abilities, although perhaps less so than later in development.  相似文献   
108.
The authors tested the hypothesis that fans of a sports team avoid private contact with their team when it is unsuccessful (cutting off reflected failure, or CORF), whereas fans actively seek private contact with their team when it is successful (basking in reflected glory, or BIRG). During the 2nd half of the 1999-2000 soccer season, the authors registered the number of visitors who had surfed the Web sites of 16 Belgian and 18 Dutch 1st-division teams on the 1st working day following a championship game. The authors obtained 586 valid measurements, which were transformed into z scores for each team separately. In line with the hypothesis, there were significantly more visitors after the teams won (BIRG) than after they lost (CORF). The effects of game outcome were not mediated by pregame expectations or by the size of the wins or losses.  相似文献   
109.
In a dual-task situation, peripheral perception can deteriorate due to different variables related to the experimental situation, such as central task complexity and the relative priority given to the two tasks. Recent studies have also shown that individual characteristics (such as the state of vigilance) can alter the useful visual field. The ability to perceive signals presented at different places in the visual field decreases in situations that lead to episodes of low vigilance. In Exp. 1, 27 subjects (18-29 years) had to perform a monotonous and prolonged dual-monitoring task involving central and peripheral vision. The test was carried out with two different sets of instructions regarding priority: the more important task was either the central task or the peripheral one. In Exp. 2, 18 subjects (18-30 years) performed the same test, but this time with two levels of complexity of the central task, either a simple monitoring activity or the same monitoring task coupled with a counting activity. Elliptical interpolation of the data enabled assessment of the deformation of the useful visual field in both experiments. The analysis of the parameters of the elliptical model indicated that the useful visual field mainly shrinks on the vertical axis, as the individual becomes drowsy. The useful visual field also shrinks on the horizontal axis when the peripheral task has priority and the monitoring activity is prolonged, or when the central task is complex.  相似文献   
110.
One way in which new concepts are added to the conceptual system is through conceptual combination. The competition-among-relations-in-nominals (CARIN) theory (Gagné & Shoben, 1997) proposes that conceptual combination involves specifying a thematic relation (e.g., noun MADE OF modifier) to link the constituent concepts (e.g., chocolate and bee). This theory claims that relations have different strengths for various concepts that correspond to how often a modifier and relation have been paired in previous encounters with combined concepts and that this relational knowledge strongly affects the ease with which combined concepts can be formed. A mathematical model that incorporates key claims of the theory is presented, and empirical findings that are relevant to evaluating the CARIN theory are reviewed. The parallels between the CARIN theory and approaches to stimulus class formation are also discussed.  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