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   2479篇
  免费   48篇
  国内免费   3篇
教育   1738篇
科学研究   180篇
各国文化   57篇
体育   247篇
综合类   2篇
文化理论   34篇
信息传播   272篇
  2023年   11篇
  2022年   12篇
  2021年   29篇
  2020年   44篇
  2019年   68篇
  2018年   134篇
  2017年   115篇
  2016年   108篇
  2015年   78篇
  2014年   89篇
  2013年   541篇
  2012年   89篇
  2011年   80篇
  2010年   68篇
  2009年   68篇
  2008年   68篇
  2007年   59篇
  2006年   46篇
  2005年   52篇
  2004年   48篇
  2003年   41篇
  2002年   41篇
  2001年   26篇
  2000年   42篇
  1999年   26篇
  1998年   29篇
  1997年   28篇
  1996年   29篇
  1995年   33篇
  1994年   25篇
  1993年   33篇
  1992年   17篇
  1991年   12篇
  1990年   29篇
  1989年   15篇
  1988年   18篇
  1987年   18篇
  1986年   13篇
  1985年   20篇
  1984年   24篇
  1983年   15篇
  1982年   14篇
  1981年   17篇
  1980年   17篇
  1979年   12篇
  1978年   11篇
  1977年   10篇
  1974年   10篇
  1973年   12篇
  1972年   8篇
排序方式: 共有2530条查询结果,搜索用时 15 毫秒
841.
Time-sampled observations of Head Start preschoolers’ (N = 264; 51.5% boys; 76% Mexican American; M = 53.11 and SD = 6.15 months of age) peer play in the classroom were gathered during fall and spring semesters. One year later, kindergarten teachers rated these children's school competence. Latent growth models indicated that, on average, children's peer play was moderately frequent and increased over time during preschool. Children with higher initial levels or with higher slopes of peer play in Head Start had higher levels of kindergarten school competence. Results suggest that Head Start children's engagement with peers may foster development of skills that help their transition into formal schooling. These findings highlight the importance of peer play, and suggest that peer play in Head Start classrooms contributes to children's adaptation to the demands of formal schooling.  相似文献   
842.
The present study investigated multidimensional motivation and engagement among Chinese middle school students in Australia (N?=?273), Hong Kong (N?=?528), and Mainland China (N?=?2106; randomly selected N?=?528). Findings showed that a multidimensional model of motivation and engagement fit very well for all three groups. Multi-group invariance tests showed that the number of factors, factor loadings, factor correlations and item uniquenesses were invariant across the three groups – as were inter-correlations with a set of cognate correlates (class participation, school enjoyment, positive intentions, academic buoyancy) – hence no differences of ‘kind’. However, differences of ‘degree’ were indicated through significant mean-level effects between groups, with self-reports favouring Australian Chinese students over Hong Kong and (to a lesser extent) Mainland Chinese students. We propose these findings shed important light on Chinese students’ academic motivation and engagement and also on socio-cultural perspectives on motivation and engagement because they assist understanding about effects attributable to context and effects attributable to ethnicity. Given this, the study is a timely contribution to current understanding of the Chinese learner in this, the ‘Asian Century’.  相似文献   
843.
Research has identified stable and dynamic characteristics in child sexual abusers working with children (CSA-W) that may distinguish them from other child sexual abusers (CSA). However, in previous research CSA-W have usually been included in the group of extra-familial CSA (CSA-E). Two hundred and forty-eight forensic-sexological reports about CSA conducted by the Federal Evaluation Centre for Violent and Sexual Offenders in the Austrian Prison System were evaluated retrospectively. One hundred and nineteen intra-familial CSA (CSA-I), 66 CSA-E, and 38 CSA-W were compared with regard to static risk factors, indicators of psychopathy, and pedophilic sexual interests. CSA-E had the highest risk of recidivism as measured by the Static-99 total score, followed by CSA-W. Furthermore, CSA-E had more previous convictions than CSA-W. Both CSA-E and CSA-I had higher total scores on the Psychopathy Checklist-Revised than CSA-W. CSA-W had the highest prevalence of pedophilia diagnoses according to DSM-IV-TR criteria, as well as the highest rate of pedophilia with an orientation toward male children, and the highest frequency of male victims. CSA-W also had the highest total scores in the Screening Scale for Pedophilic Interests. CSA-W seem to constitute a group with particular risk factors and criminogenic needs, that is, they show more indicators of pedophilic sexual interests but less general antisociality and psychopathy, and would thus seem to be distinguishable from other CSA. Future research should focus in particular on evaluating differences in the grooming strategies used by CSA-W to commit and disclose child sexual abuse, as well as on the resources of this particular offender group.  相似文献   
844.
The Austrian ‘school autonomy policy’, which allowed schools to develop specific ‘curricular profiles’, is taken as an example for discussing processes and effects of school decentralization policies. Data from school case studies (based on qualitative interviews and document analysis) are used to analyse and interpret the processes by which schools and teachers take up policy innovations and translate it into action and structures on school and classroom level. These policy changes and the resulting governance regimes are examined from a perspective on changing modes of ‘action coordination’ between actors on different levels of a school system and from an attention to processes of ‘re-contextualization’ in multi-level governance systems. The main result is that the Austrian decentralization policy – although not explicitly based on a market approach – boosted principles of competitive coordination between schools. In consequence, it resulted in processes of differentiation and hierarchization of schools and classes and offered new legitimatory and practical opportunities for student selection.  相似文献   
845.
Hungry rats were used in a classical conditioning procedure in which visual stimuli were paired with food. Conditions in which nonreinforced exposure to a nontarget stimulus was followed by exposure to a simultaneous compound nontarget/target stimulus (a blocking procedure) resulted in enhanced latent inhibition to the target relative to exposure to the nontarget, followed by exposure to the target stimulus alone. A third phase of nonreinforced exposure training, in which the target was exposed alone following the compound, reduced levels of latent inhibition relative to results obtained with the blocking procedure. Experiments also suggested that this was not the result of restoration of associability by the omission of an expected presentation of the nontarget stimulus in the final preexposure phase. These results suggest that enhanced latent inhibition is due to summation of a direct-target-no-event association and a second-order association of these elements via target-nontarget and nontarget-no-event association. Exposure to the target after compound exposure extinguished the target-nontarget association and reduced the sources of no-event learning for the target.  相似文献   
846.
This study investigated the relationships among different forms of peer victimization and prosocial experiences and early adolescent emotional well‐being. A total of 571 students in grades 6–8 were administered the Positive and Negative Affect Scale–Children, Multidimensional Students' Life Satisfaction Scale, and the Children's Self Experience Questionnaire–Self Report. Females reported more prosocial experiences; males reported more overt and relational victimization. Differential predictors were observed for the emotional well‐being variables of life satisfaction, positive affect, and negative affect in a series of hierarchical multiple regression equations. Overt victimization experiences added significant variance to all three well‐being equations. Relational victimization experiences added significant variance to the negative affect equation. After accounting for overt and relational experiences, prosocial experiences added significant variance to the life satisfaction and positive affect equations. The experience of prosocial peer interactions thus appears to serve as a protective factor with respect to the relationship between victimization and life satisfaction and positive affect for early adolescents. © 2007 Wiley Periodicals, Inc. Psychol Schs 44: 199–208, 2007.  相似文献   
847.
Abstract

We examined how emotional and communication functioning at kindergarten predicted the academic trajectories of refugee children. Drawing from a population-based Canadian cohort, the study followed 629 refugee children from age 5 to 13 and (i) modeled kindergarten, Grade 4, and Grade 7 academic trajectories via group-based trajectory modeling and (ii) investigated to what extent teacher ratings of kindergarten emotional and communication functioning predicted academic trajectory group membership. Three groups were identified: ‘Average’ (n?=?438), ‘Declining’ (n?=?119), and ‘Low-But-Improving’ (n?=?72) groups. Logistic regression analyses revealed that, in comparison to the Average trajectory, lower emotional functioning at kindergarten was associated with an increased likelihood of a Declining academic trajectory, whereas lower communication functioning at kindergarten was associated with a greater likelihood of a Low-But-Improving trajectory (versus an Average trajectory). The findings indicate that refugee children are more likely to overcome early communication challenges versus emotional challenges to achieve academically, and this has important implications for early mental health support.  相似文献   
848.
The conditions under which explicit instruction in checking, combined with worked examples, may be beneficial in learning how to translate sentences into algebraic equations was examined from the perspective of cognitive load theory. In two experiments it was shown that Grade 8 and 9 students were initially disadvantaged by the inclusion of a checking method. However, after a more substantial period of acquisition, students with a low level of mathematical knowledge performed significantly better after receiving checking instructions than those who did not receive checking instructions. In contrast, higher knowledge students were continually disadvantaged by the inclusion of a checking method. The positive effect of checking for lower knowledge students and the negative effect for higher knowledge students in this domain is a further example of the expertise reversal effect.  相似文献   
849.
A large number of American elementary school students are now studying science using the hands‐on inquiry curricula developed in the 1990s: Insights; Full Option Science System (FOSS); and Science and Technology for Children (STC). A goal of these programs, echoed in the National Science Education Standards, is that children should gain “abilities to do scientific inquiry” and “understanding about scientific inquiry.” We have studied the degree to which students can do inquiries by using four hands‐on performance assessments, which required one or three class periods. To be fair, the assessments avoided content that is studied in depth in the hands‐on programs. For a sample of about 1000 fifth grade students, we compared the performance of students in hands‐on curricula with an equal number of students with textbook curricula. The students were from 41 classrooms in nine school districts. The results show little or no curricular effect. There was a strong dependence on students' cognitive ability, as measured with a standard multiple‐choice instrument. There was no significant difference between boys and girls. Also, there was no difference on a multiple‐choice test, which used items released from the Trends in International Mathematics and Science Study (TIMSS). It is not completely clear whether the lack of difference on the performance assessments was a consequence of the assessments, the curricula, and/or the teaching. © 2006 Wiley Periodicals, Inc. J Res Sci Teach 43: 467–484, 2006  相似文献   
850.
This editorial introduction positions distance education in the larger context of educational research and theory construction. Next to a definition of key concepts, the authors elaborate three major issues that are dealt with in distance education research in relation to educational materials. The first issue centres on curriculum and values. The second topic concentrates on the creation of appropriate learning environments. The third issue focuses on the evaluation of effects of materials in use. In discussing the three issues the authors stress the particularities of the distance education context.  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