全文获取类型
收费全文 | 17552篇 |
免费 | 206篇 |
国内免费 | 7篇 |
专业分类
教育 | 12692篇 |
科学研究 | 1752篇 |
各国文化 | 88篇 |
体育 | 1327篇 |
综合类 | 14篇 |
文化理论 | 156篇 |
信息传播 | 1736篇 |
出版年
2021年 | 138篇 |
2020年 | 187篇 |
2019年 | 307篇 |
2018年 | 475篇 |
2017年 | 510篇 |
2016年 | 529篇 |
2015年 | 349篇 |
2014年 | 364篇 |
2013年 | 2829篇 |
2012年 | 472篇 |
2011年 | 542篇 |
2010年 | 317篇 |
2009年 | 259篇 |
2008年 | 399篇 |
2007年 | 301篇 |
2006年 | 362篇 |
2005年 | 870篇 |
2004年 | 654篇 |
2003年 | 477篇 |
2002年 | 347篇 |
2001年 | 390篇 |
2000年 | 323篇 |
1999年 | 286篇 |
1998年 | 136篇 |
1997年 | 161篇 |
1996年 | 177篇 |
1995年 | 185篇 |
1994年 | 148篇 |
1993年 | 165篇 |
1992年 | 237篇 |
1991年 | 214篇 |
1990年 | 211篇 |
1989年 | 248篇 |
1988年 | 246篇 |
1987年 | 209篇 |
1986年 | 206篇 |
1985年 | 220篇 |
1984年 | 190篇 |
1983年 | 230篇 |
1982年 | 173篇 |
1981年 | 162篇 |
1980年 | 157篇 |
1979年 | 230篇 |
1978年 | 181篇 |
1977年 | 164篇 |
1976年 | 151篇 |
1975年 | 129篇 |
1974年 | 121篇 |
1973年 | 126篇 |
1971年 | 106篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
981.
Pedro Rosário José Carlos Núñez Luisa Trigo Carina Guimarães Estrella Fernández Rebeca Cerezo 《高等教育研究与发展》2015,34(1):173-187
The current investigation aims at assessing the effectiveness of an intervention program designed to enhance self-regulated learning (SRL) strategies at the university level, with students from different cultural, linguistic, and educational backgrounds. The central tool of the program is a set of letters in which a fictional first-year student describes his experiences as an SRL student. The program was implemented in four universities in different countries and continents (Portugal, Spain, Chile, and Mozambique), with an experimental group and a comparison group at each university (263 students from experimental groups and 247 from comparison groups). Findings display the effectiveness of the program in enhancing a set of motivational variables related to the study process and the use of SRL strategies. Data were consistent across the different cultural and academic contexts in which the program was implemented. The implications of these findings for university administrators and faculty are discussed. 相似文献
982.
983.
Previous experiments have shown a deleterious effect of visual representations on college students’ ability to solve total- and joint-probability word problems. The present experiments used conditional-probability problems, known to be more difficult than total- and joint-probability problems. The diagram group was instructed in how to use tree diagrams to solve conditional probability problems; the equation-only group was instructed only in the formulation of equations. Results indicated that the diagram group outperformed the equation-only group on a posttest of 10 near- and far-transfer problems given immediately and as long as 1 week later (Experiment 2). In addition, when rating their experience with the training phase the equation-only group reported significantly higher levels of frustration and lower levels of perceived success than the diagram group. 相似文献
984.
985.
Laura E. Hume Christopher J. Lonigan Jessica D. McQueen 《Journal of Research in Reading》2015,38(2):172-193
This study examined how children's literacy interests related to parent literacy‐promoting practices across time. Using a sample of 909 preschool‐age children and the newly developed Child Activities Preference Checklist, literacy interest appeared to be a complex construct, not easily captured by a single measure. In a subsample of 230 children with longitudinal data, parent literacy practices and child literacy interests related concurrently and across time. Parent literacy practices were more stable than child literacy interests, with children's literacy interest continuing to develop over the preschool year. Parent practices of exposing children to literacy and teaching them literacy concepts appeared to be distinct constructs. Exposure to literacy was especially important in the growth of literacy interests and the hypothesis that exposure has a negative effect on children with little initial interest was not fully supported. 相似文献
986.
987.
Reducing Risk for Substance Use by Economically Disadvantaged Young Men: Positive Family Environments and Pathways to Educational Attainment
下载免费PDF全文
![点击此处可从《Child development》网站下载免费的PDF全文](/ch/ext_images/free.gif)
Monica J. Martin Rand D. Conger Stephanie L. Sitnick April S. Masarik Erika E. Forbes Daniel S. Shaw 《Child development》2015,86(6):1719-1737
Using prospective, longitudinal data spanning 10 years (age = 10–20) from a study of 295 economically disadvantaged males, the current investigation evaluated a developmental model that links early family environment and later educational aspirations, extracurricular activities, and educational attainment to substance use in early adulthood. The results indicate that a positive family environment during adolescence (low family conflict, high family warmth, and effective child management) predicted educational involvements during adolescence that promoted educational attainment during early adulthood. Finally, higher levels of educational attainment were associated with less substance use in early adulthood, even after controlling for adolescent substance use. These findings suggest that positive parenting promotes educational achievements that increase resilience to substance use for economically disadvantaged males. 相似文献
988.
989.
990.
This study examined how specific guidelines and heuristics have been used to identify methodological rigor associated with single‐case research designs based on quality indicators developed by Horner et al. Specifically, this article describes how literature reviews have applied Horner et al.'s quality indicators and evidence‐based criteria. Ten literature reviews were examined to ascertain how literature review teams (a) used the criteria recommended by Horner et al. as meeting the 5‐3‐20 evidence‐based practice (EBP) thresholds (five studies conducted across three different research teams that include a minimum of 20 participants) to assess single‐case methodological rigor; and (b) applied the 5‐3‐20 thresholds to determine whether the independent variables reviewed qualified as potential effective practices. The 10 literature reviews included 120 single‐case designs. This study found that 33% of the reviewed single‐case designs met Horner et al.'s quality indicator criteria. Three of the literature reviews concluded that examined practices met criteria to qualify as an EBP. Recommendations related to quality indicator criteria and EBP established by the literature review teams as well as directions for future research are discussed. 相似文献