全文获取类型
收费全文 | 4561篇 |
免费 | 57篇 |
国内免费 | 10篇 |
专业分类
教育 | 3414篇 |
科学研究 | 241篇 |
各国文化 | 43篇 |
体育 | 406篇 |
综合类 | 3篇 |
文化理论 | 62篇 |
信息传播 | 459篇 |
出版年
2022年 | 27篇 |
2021年 | 44篇 |
2020年 | 59篇 |
2019年 | 112篇 |
2018年 | 141篇 |
2017年 | 152篇 |
2016年 | 146篇 |
2015年 | 99篇 |
2014年 | 118篇 |
2013年 | 936篇 |
2012年 | 131篇 |
2011年 | 128篇 |
2010年 | 149篇 |
2009年 | 135篇 |
2008年 | 146篇 |
2007年 | 144篇 |
2006年 | 108篇 |
2005年 | 95篇 |
2004年 | 99篇 |
2003年 | 81篇 |
2002年 | 96篇 |
2001年 | 66篇 |
2000年 | 107篇 |
1999年 | 74篇 |
1998年 | 74篇 |
1997年 | 63篇 |
1996年 | 73篇 |
1995年 | 57篇 |
1994年 | 67篇 |
1993年 | 63篇 |
1992年 | 49篇 |
1991年 | 70篇 |
1990年 | 51篇 |
1989年 | 47篇 |
1988年 | 37篇 |
1987年 | 45篇 |
1986年 | 45篇 |
1985年 | 43篇 |
1984年 | 47篇 |
1983年 | 39篇 |
1982年 | 31篇 |
1981年 | 35篇 |
1980年 | 30篇 |
1979年 | 24篇 |
1978年 | 32篇 |
1977年 | 38篇 |
1976年 | 27篇 |
1975年 | 22篇 |
1974年 | 23篇 |
1972年 | 14篇 |
排序方式: 共有4628条查询结果,搜索用时 327 毫秒
231.
Cristina Rodríguez Madelon van den Boer Juan E. Jiménez Peter F. de Jong 《Scientific Studies of Reading》2015,19(4):273-288
We examined the developmental relations of phonological awareness (PA) and rapid automatized naming (RAN) with reading in a cross-sectional study with 874 Spanish children from Grades 2 to 6. Our main prediction was that the RAN–reading relationship would decrease due to a gradual change in reading strategy, from serial decoding to sight word reading. Therefore, in contrast to most previous studies, we used discrete reading tasks. Serial RAN tasks for objects, colors, digits, and letters were included. First, we examined whether the RAN tasks loaded on the same constructs across time. An alphanumeric and a nonalphanumeric factor were identified, which were invariant over time. In subsequent multigroup structural equation models we found that the PA–reading relationship was low but slightly increased in the higher grades. As predicted, the RAN–reading relationship decreased for words, whereas the relationship remained stable for pseudowords. 相似文献
232.
Online surveys are increasingly used in educational research, yet little attention has focused on ethical issues associated with their use in educational settings. Here, we draw on the broader literature to discuss 5 key ethical issues in the context of educational survey research: dual teacher/researcher roles; informed consent; use of incentives; privacy, anonymity, and confidentiality; and data quality. We illustrate methods of addressing these issues with our experiences conducing online surveys in educational contexts. Moving beyond the procedural ethics approach commonly adopted in quantitative educational research, we recommend adopting a situated/process ethics approach to identify and respond to ethical issues that may arise during the conduct, analysis, and reporting of online survey research. The benefits of online surveying in comparison to traditional survey methods are highlighted, including the potential for online surveys to provide ethically defensible methods of conducting research that would not be feasible in offline education research settings. 相似文献
233.
Priscilla Savopoulos Stephanie Brown Peter J. Anderson Deirdre Gartland Christina Bryant Rebecca Giallo 《Child development》2022,93(4):e396-e411
The cognitive functioning of children who experience intimate partner violence (IPV) has received less attention than their emotional-behavioral outcomes. Drawing upon data from 615 (48.4% female) 10-year-old Australian-born children and their mothers (9.6% of mothers born in non-English speaking countries) participating in a community-based longitudinal study between 2004 and 2016, this study examined the associations between IPV in infancy and cognition in middle childhood (at age 10). Results showed that IPV in the first 12 months of life was associated with lower general cognitive ability and poorer executive attention but not working memory skills. IPV in middle childhood (in the 10th year postpartum) was not associated with cognition. This study provides evidence for the long-term impact of early life exposure to IPV on children's cognition, and points to the importance of early intervention to optimize development. 相似文献
234.
Brunetto Domenico Bernardi Giulia Andrà Chiara Liljedahl Peter 《Educational Studies in Mathematics》2022,110(1):65-81
Educational Studies in Mathematics - In the spring of 2020, schools and universities around the world were closed because of the COVID-19 pandemic. The relative lockdown affected more than... 相似文献
235.
Bahr Peter Riley Boeck Claire A. Cummins Phyllis A. 《Research in higher education》2022,63(4):631-671
Research in Higher Education - Students 25 years of age and older comprise one-third of the population in public two-year institutions, and these students face significant disadvantages in... 相似文献
236.
Teaching About Electricity in Primary School Multimodality and Variation Theory as Analytical Lenses
Research in Science Education - Primary school topics involving abstract concepts are challenging to teach. Electric circuits can be simply constructed but complex to explain. New approaches in... 相似文献
237.
Garance Delagneau E. Sabrina Twilhaar Renee Testa Sarit van Veen Peter Anderson 《Child development》2023,94(3):779-801
This meta-analysis examined the relationship between prenatal maternal stress and/or anxiety and the outcomes of children aged 3 months to 9 years. Of the 8754 studies published before June 2021 that were synthesized, 17 conducted in Western countries were included in the meta-analysis (Ntotal = 23,307; Mmales 54%; Methnicity White 77%, Pacific 15%, African American/Black 10%, Middle Eastern 7%, Eastern 8%). Effect sizes ranged from −0.41 to 0.15. A weak negative association was found between prenatal stress and/or anxiety exposure and children's general intellectual development. Associations varied based on the type of exposure. Findings are limited to developed counties and cannot be generalized to low- and middle-income countries. Directions for maternal prenatal intervention and future studies are discussed. 相似文献
238.
Savaş Karataş Katharina Eckstein Peter Noack Monica Rubini Elisabetta Crocetti 《Child development》2023,94(1):237-253
This study investigated the associations between cultural diversity approaches endorsed by teachers and adolescents' positive and negative intergroup contact in schools. Participants were 984 adolescents (Mage = 14.66; 62.7% female; 24.8% ethnic minority) involved in a three-wave longitudinal study between 2019 and 2020. Results highlighted that perceived equal treatment by teachers was related to higher positive and lower negative contact over time. However, perceived support for contact and cooperation and interest of teachers in children's cultural background were not related to either positive or negative contact over time. Importantly, the results were replicated across ethnic minority and majority adolescents. This study provides novel insights into the key role that teachers can play in promoting cultural diversity approaches to facilitate harmonious intergroup interactions in schools. 相似文献
239.
Breaktimes are ubiquitous in English schools. Research suggests they have social value for children, but school staff often have a range of concerns about breaktimes and tend to undervalue them. However, there is little understanding about these times, not least because data are not collected about their organisation and characteristics. This paper brings together data from three national surveys undertaken in 1995, 2006 and 2017 of head teachers of primary and secondary schools to provide an understanding of the nature, organisation and staff attitudes towards breaktimes and how they have changed over 25 years. At each survey point, completed questionnaires were received from representative random samples of over 1000 primary and secondary schools. Results showed marked reductions in the average total amount of time for breaks, the virtual abolition of afternoon breaks and a decline in time available for lunchtime breaks. The reductions were largely for behavioural reasons and to increase time for learning. Results also show variations in the length of breaktimes across school types and in relation to socioeconomic disadvantage, and changes to the amount of supervision provided by schools. Attitudes towards breaks varied across primary and secondary phases, and the withholding of breaks was used by schools to address poor pupil behaviour and disengagement. Schools continued to have concerns about the management of behaviour during breaktimes, even when breaks had already been shortened. It is suggested that staff undervalue the potential contribution that breaktimes afford the development and wellbeing of children and young people in school. 相似文献
240.
The paper presents a model that evaluates how upgraded technological capabilities of emerging country based multinationals (EMNCs) and an increase in the domestic market size of large emerging countries affect value chain location choices and the competitiveness of emerging country based firms versus advanced country based ones. The model shows that, even without possessing a competitive advantage in terms of technology and/or brands, EMNCs from large or rapidly technologically advancing countries can become dominant players in the global system. The model highlights the central role of firm level technological intensity and product differentiation in determining the location of value chain activities as well as defining organisational boundaries. Empirical analysis of the location choices of the world's top multinationals from large advanced and emerging countries in 2010 supports the model's predictions. 相似文献