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   33990篇
  免费   1470篇
  国内免费   27篇
  35487篇
  2021年   308篇
  2020年   427篇
  2019年   544篇
  2018年   752篇
  2017年   722篇
  2016年   768篇
  2015年   518篇
  2014年   621篇
  2013年   2760篇
  2012年   1216篇
  2011年   1203篇
  2010年   748篇
  2009年   740篇
  2008年   1015篇
  2007年   992篇
  2006年   895篇
  2005年   752篇
  2004年   714篇
  2003年   648篇
  2002年   659篇
  2001年   1073篇
  2000年   1086篇
  1999年   799篇
  1998年   333篇
  1997年   307篇
  1995年   320篇
  1992年   638篇
  1991年   596篇
  1990年   578篇
  1989年   552篇
  1988年   545篇
  1987年   490篇
  1986年   488篇
  1985年   536篇
  1984年   436篇
  1983年   401篇
  1982年   315篇
  1979年   476篇
  1978年   328篇
  1976年   320篇
  1975年   365篇
  1974年   437篇
  1973年   470篇
  1972年   406篇
  1971年   351篇
  1970年   318篇
  1969年   340篇
  1968年   427篇
  1967年   370篇
  1966年   362篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
101.
I have benefited greatly from discussing the issues addressed in this paper with Michael Liston, John Vickers and Mark Wilson.  相似文献   
102.
The purpose of this study was to investigate differences in scores of 59 mentally retarded adults (mild, moderate, severe, or profound), 133 advantaged, and 130 disadvantaged (low income) children in Grades 1, 2, 3 on the Primary Measures of Music Audiation. Test-retest reliabilities for the Tonal and Rhythm subtests were .81 and .86, respectively, for the retarded group. Analysis of variance indicated that the mildly retarded children performed significantly better than other groups of retarded children on these two tests. 2 x 3 analyses of variance indicated that third graders from both advantaged and disadvantaged groups performed significantly better than the first or second graders on both subtests and that advantaged children performed significantly better than the disadvantaged. However, disadvantaged children made greater gains, especially for third graders, than the advantaged.  相似文献   
103.
104.
105.
In choice reaction time, stimuli and responses in some combinations (e.g., based on spatial arrangement) are faster than in other combinations. To test whether motion toward a position yields faster responses at that position, a computer-generated square in front of one hand appeared to move either toward that hand or toward the other hand. Compatible responses (e.g., motion toward left hand/left response) were faster than incompatible responses, even when that opposed traditional positional compatibility. In Experiment 2, subjects responded to the same stimuli but with both hands left, right, or on the body midline. Medial responses were the fastest, showing that destination, rather than mere relative position, was a critical variable. It was suggested that spatial compatibility effects are not unique to position but apply to a variety of task situations, describable by J.J. Gibson's theory of affordances, in which he claims that one perceives the actions (e.g., catching) permitted in a situation.  相似文献   
106.
Black and White college students were studied to determine reactions to moral dilemmas when the race of the central character in the dilemma was changed.  相似文献   
107.
Previous research on the effect of lecture handouts on student learning indicates that students who are given skeletal handouts usually perform better in course examinations than students who take all their own notes. The present study investigates whether the amount of detail in the handout is a critical factor in this. A randomized groups experiment was conducted in the context of a course on dental surgery. Four lecture handout conditions (headings and full text; headings and key points; headings only; no supplementary materials) were compared on tests 2 days and 2 weeks after the lecture. The significant differences between conditions were: ‘headings only’ better than ‘headings and key points’ on the first test; ‘headings only’ better than ‘no supplementary materials’ on the second test; and ‘headings and full text’ better than ‘no supplementary materials’ on the second test. These results indicate that the amount of detail is a critical factor in handout effectiveness.  相似文献   
108.
Ralph Bedell, professor emeritus of educational and counseling psychology, was interviewed to gain insight into the influence of the National Defense Counseling and Guidance Institutes on the history of counseling and to learn about the man who was responsible for the NDEA program.  相似文献   
109.
We investigated longitudinally the effects of a stroke on the social support systems and well-being of the patient's primary support person, both acutely and as the condition stabilized. Individuals who had suffered a first stroke and a primary support person participated in two waves of data collection, carried out in 6-month intervals beginning 7 weeks after the stroke. Our data show that the prevalence of depressive symptoms is from 2 1/2 to 3 1/2 times higher than rates found among representative samples of middle-aged and elderly populations. Mean level of depression did not change over time, although level of optimism declined significantly. Multiple regression analyses showed that levels of depression and perceived burden in support persons are highly related to aspects of the stroke such as its severity, and that demographic variables such as age and income play a relatively minor role in attenuating these relations in the acute adjustment phase. However, from 7 to 9 months after the stroke, well-established demographic variables such as health, income, and age were significant predictors of depression. Individuals who were older and who had good health and higher incomes were least depressed.  相似文献   
110.
Cognitive monitoring and strategy choice in younger and older adults   总被引:1,自引:0,他引:1  
Younger (24- to 39-year-old) and older (60- to 88-year-old) adults learned a list of vocabulary words; one half of the words were studied using a generally more powerful strategy (mnemonic keyword method), and one half mediated with a less powerful approach (generating semantic contexts). Before using these strategies as part of the experiment, neither younger nor older adults judged that the keyword method was more effective and neither group preferred one strategy over the other. After using the strategies and taking a test of strategically studied unfamiliar vocabulary words, the younger subjects reported accurately the relative effectiveness of the two strategies and selected the one that had worked better for them to apply to a subsequent list of vocabulary items. The older participants were not as aware of the differential potency of the strategies and did not rely as much as did the younger subjects on knowledge of strategy utility in making strategy choices. In short, metacognitive awareness of strategy effects produced by monitoring and use of metacognitive awareness in regulating strategy choice were more pronounced in the younger compared with the older sample in this study.  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