全文获取类型
收费全文 | 1502篇 |
免费 | 25篇 |
国内免费 | 1篇 |
专业分类
教育 | 1274篇 |
科学研究 | 22篇 |
各国文化 | 26篇 |
体育 | 40篇 |
综合类 | 2篇 |
文化理论 | 2篇 |
信息传播 | 162篇 |
出版年
2023年 | 7篇 |
2022年 | 10篇 |
2021年 | 20篇 |
2020年 | 20篇 |
2019年 | 46篇 |
2018年 | 53篇 |
2017年 | 63篇 |
2016年 | 52篇 |
2015年 | 29篇 |
2014年 | 51篇 |
2013年 | 349篇 |
2012年 | 37篇 |
2011年 | 41篇 |
2010年 | 39篇 |
2009年 | 58篇 |
2008年 | 36篇 |
2007年 | 45篇 |
2006年 | 41篇 |
2005年 | 34篇 |
2004年 | 50篇 |
2003年 | 43篇 |
2002年 | 36篇 |
2001年 | 14篇 |
2000年 | 24篇 |
1999年 | 23篇 |
1998年 | 18篇 |
1997年 | 29篇 |
1996年 | 22篇 |
1995年 | 27篇 |
1994年 | 19篇 |
1993年 | 17篇 |
1992年 | 15篇 |
1991年 | 11篇 |
1990年 | 15篇 |
1989年 | 10篇 |
1988年 | 14篇 |
1987年 | 7篇 |
1986年 | 11篇 |
1985年 | 14篇 |
1984年 | 14篇 |
1983年 | 14篇 |
1982年 | 8篇 |
1981年 | 10篇 |
1980年 | 5篇 |
1979年 | 4篇 |
1978年 | 3篇 |
1977年 | 5篇 |
1976年 | 6篇 |
1975年 | 3篇 |
1968年 | 2篇 |
排序方式: 共有1528条查询结果,搜索用时 640 毫秒
211.
Our purpose was to compare the effect of a periodized preparation consisting of power endurance training and high-intensity power training on the contractile properties of the quadriceps muscle and functional performances in well trained male sprinters (n = 7). After 4 weeks of high-intensity power training, 60-m sprint running time improved by an average of 1.83% (SD = 0.96; p < .05). This improvement was inversely related to an increase in maximal voluntary contraction torque (r = -.89, p < .05) and poorly correlated with changes in the contractile kinetics of the quadriceps muscle (r range from .36 to -.46). These findings suggest that sprint performance is poorly predicted by muscle intrinsic properties and that a neural adaptation appears to explain most of the observed functional adaptations. 相似文献
212.
Linda Banwell Kathryn Ray Graham Coulson Christine Urquhart Ray Lonsdale Chris Armstrong Rhian Thomas Siân Spink Alison Yeoman Roger Fenton Jennifer Rowley 《British journal of educational technology : journal of the Council for Educational Technology》2004,35(5):607-616
This article aims to provide a baseline for future studies on the provision and support for the use of digital or electronic information services (EIS) in further education. The analysis presented is based on a multi‐level model of access, which encompasses access to and availability of information and communication technology (ICT) resources, access to and availability of EIS resources, and the third leg of staff skills and their development. The research was conducted within the third cycle of the JISC (Joint Information Services Committee) User Behaviour Monitoring and Evaluation Framework, in 2001/2002. Evidence was gathered from library and information service web sites and various stakeholders, including library and information service staff, academic staff and students to generate insights into the provision of access to EIS in further education. Sector‐wide funding initiatives have had a significant impact on ICT infrastructures, and these attract a positive response from students. EIS are represented on some library web sites but both web site development and EIS availability is very much less advanced than in higher education. Staff, however, lack sufficient dedicated access to ICT to be able to develop their own skills and use. There remains a low level of access to electronic information resources, with only limited access to these resources through library web sites. LIS managers face a number of challenges in enhancing this provision, including licensing arrangements, tight budgets that need to be spread across many discipline areas, and the absence of EIS designed specifically for the further education student. The other key challenge lies in the provision of time and opportunity for academic and LIS staff to develop their ICT and EIS skills, and, more generally in the further development of the role of Information and Learning Technology (ILT) Champions. 相似文献
213.
Symbolic Gesture versus Word: Is There a Modality Advantage for Onset of Symbol Use? 总被引:1,自引:0,他引:1
Researchers have hypothesized in the past that children learning sign languages develop signs at an earlier age than is typically expected for vocal words. This assumption, however, has recently been questioned on the grounds that researchers have not always guaranteed that words and gestures are being used in a comparable fashion. The present study was designed to shed light on this controversy by comparing the onset of symbolic use of signs and words in a group of 22 hearing children exposed to symbolic gestures from 11 months onward. Bimonthly interviews emphasizing contexts of use of gestures and vocal words indicated a smaller modality difference than early research had predicted, thus providing support for the hypothesis that strides in cognitive abilities such as memory, categorization, and symbolization underlie this milestone in both modalities. At the same time, however, the data also indicated that the small difference in onset time was reliable, thus providing support for the notion that the gestural modality is, in fact, easier for many infants to master once the requisite cognitive skills are in place. 相似文献
214.
Martin Pinquart Linda P. Juang Rainer K. Silbereisen 《Journal of Career Development》2004,31(2):125-142
In times of dramatic social change, new career options emerge and old options may become obsolete. We investigated predictors of change in general career aspirations and of plans to attend a university of East German adolescents from 1989 (before German unification) to 1991 and 1995, respectively, after German unification. Higher pre-unification self-efficacy beliefs were associated with an increase in general career aspirations and a higher probability of switching from non-college-bound vocational training to attending a university. In addition, better pre-unification school grades and having parents who graduated from a university increased adolescents' probability to switch to a university. Furthermore, interaction effects of self-efficacy with grades and cognitive abilities appeared, indicating that for individuals with high self-efficacy, cognitive abilities became more important and grades less important in predicting the wish to pursue university studies. We concluded that beliefs in one's capabilities, and high academic abilities are important resources in vocational reorientation in times of social change. 相似文献
215.
Previous research has confirmed peers and parents as significant agents of socialisation with respect to young people’s sexuality. The aim of this cross-sectional cohort study was to examine how parental and peer variables predict young women’s sexual behaviour and sexuality-related thoughts and emotions, and whether perceived peer influences mediate the relationship between parental variables and young person sexuality. A total of 560 female high school students of 1st (mean age 15.56 years) and 3rd grade (mean age 17.55 years), selected by means of two-stage stratified probability sampling participated in the research. Results confirmed that peer variables explained considerably more variance in participant sexuality than parental variables. Indirect parental communication about sexuality was a significant positive predictor of sexual behaviour and sexuality-related thoughts and emotions in both subsamples. The strength of direct and indirect influences of parents and peers on young people’s sexuality is determined by the age of the young person and specific aspects of adolescent sexuality. Perceived percentage of sexually active peers was the only mediator in older participants, while in the younger subsample, additional peer variables mediated the association between some parental and sexuality variables. In the discussion, special attention is given to implications of these results for planning future forms of comprehensive sexual education. 相似文献
216.
Performance on a standardized reading comprehension test reflects the number of correct answers readers select from a list of alternate choices, but fails to provide information about how readers cope with the various cognitive demands of the task. The aim of this study was to determine whether three groups of readers: normally achieving (NA), poor comprehenders (CD), with no decoding disability, and reading disabled (RD), poor comprehenders with poor decoding skills, differed in their ability to cope with reading comprehension task demands. Three task variables reflected in the question-answer relations that appear on standardized reading comprehension tests were identified.Passage Independent (PI) question can be answered with reasonable accuracy based on the reader's prior knowledge of the passage content.Inference (INFER) questions required the reader to generate an inference at the local or global test level.Locating (LOCAT) questions require the reader to match the correct answer choice to a detail explicitly stated in the text either verbatim or in paraphrase form. The relations among reader characteristics, cognitive task factors and reading comprehension test scores were analyzed using a structural relations equation with LISREL. It was found that the three reading groups differed with respect to the underlying relationship between their performance on specific question-answer types and their standardized reading comprehension score. For the NA group, a high score on PI was likely to be accompanied by a low score on INFER, whereas in the CD and RD groups, PI and INFER are positively related. The finding of a negative relationship between background knowledge and inference task factors for normally achieving readers suggests that even normal readers may have comprehension difficulties that go undetected on the basis of a standardized scores. This study indicates that current comprehension assessments may not be adequate for assessing specific reading difficulties and that more precise diagnostic tools are needed. 相似文献
217.
This study was designed to examine the role of intelligence (IQ) in the definition of reading disabilities (RD) in languages with different orthographic systems. A sample of 94 Spanish children and 157 English-speaking Canadian children with RD was classified into four groups on the basis of IQ scores from the Wechsler Intelligence Scale for Children-Revised (< 80; 81-90; 91-109; 110-140). We examined the reading and spelling skills of Canadian and Spanish children as a function of Full Scale, Verbal, and Performance IQ scores. Significant differences between the languages were found when reading performance was analyzed as a function of Verbal IQ scores, in that there were some differences between the groups of Canadian children with RD but not between the groups of Spanish children. The Canadian children with Verbal IQ scores < 80 demonstrated relatively lower performance in reading and spelling skills than the Canadian groups with higher IQ scores. There were differences in reading tasks as a function of Performance IQ in English but not in Spanish. The differences in the role of IQ as a function of orthographic systems may relate to the greater significance of visual-orthographic as opposed to phonological processing in English. 相似文献
218.
Sandy Magnuson Linda L. Black Maria K. E. Lahman 《Counselor Education & Supervision》2006,45(3):162-179
This article is the 3rd in a series that has been focused on the experiences of assistant professors of counselor education who were at the conclusion of their 3rd year in the profession. Thirty‐six participants provided information about their experiences, sources of pleasure and displeasure, professional contributions, areas of change, and expectations for tenure and promotion. Prominent themes that emerged from the data included mentoring, balance and family focus, and scholarship. Recommendations are presented for counselor educators‐in‐training, candidates, new counselor educators (CEs), and veteran CEs. 相似文献
219.
Linda Lohr Steven M. Ross Gary R. Morrison 《Educational technology research and development : ETR & D》1995,43(2):33-51
The present research consisted of a comprehensive evaluation of a hypertext model for teaching process writing at the junior high and high school level. Interests were to determine how two teachers and three different age groups of students used and reacted to the model, specifically, its embedded design features of model stories, note cards, idea buttons, mini-lessons, branching buttons, and cut-and-paste-tools. Results showed applications of the embedded features to vary based on teacher attitudes, feature attributes (e.g., ease of use and appeal), and student characteristics. Older students made more usage of many of the features, but were less positive about the hypertext model given their greater involvement with completing writing assignments rather than with exploring new forms of writing. The implications of the results are discussed regarding the instructional design and classroom implementation of new technologies for teaching process writing strategies.This study was conducted as a doctoral dissertation completed by the first author at the University of Memphis under the supervision of the second and third authors. 相似文献
220.
AN INVESTIGATION OF CRITICAL MASS: The Role of Latino Representation in the Success of Urban Community College Students 总被引:3,自引:0,他引:3
Linda Serra Hagedorn Winny Chi Rita M. Cepeda Melissa McLain 《Research in higher education》2007,48(1):73-91
The community college has historically functioned as a primary access point to postsecondary education for Latino students.
This study, an investigation conducted through an analysis of the Transfer and Retention of Urban Community College Students
(TRUCCS) project, focuses on Latino students enrolled in urban “minority-majority” community colleges, where Latino students
have a high representation. The specific interest of this research is the role and effect of the level of representation of
Latino community college students on their academic outcomes. The relationship between the level of representation of Latinos,
and the levels of academic success are analyzed in concert with other variables, such as, the level of representation of Latino
faculty on campus, student age, attitude, academic integration, English ability and aspiration. Findings indicate a relationship
between academic success of Latino community college students and the proportion of Latino students and faculty on campus.
The findings thus suggest that a critical mass of Latinos may be a positive influence encouraging “minority” students to higher
academic performance. 相似文献