全文获取类型
收费全文 | 16953篇 |
免费 | 246篇 |
国内免费 | 54篇 |
专业分类
教育 | 12550篇 |
科学研究 | 1195篇 |
各国文化 | 172篇 |
体育 | 1201篇 |
综合类 | 45篇 |
文化理论 | 81篇 |
信息传播 | 2009篇 |
出版年
2021年 | 186篇 |
2020年 | 233篇 |
2019年 | 353篇 |
2018年 | 504篇 |
2017年 | 536篇 |
2016年 | 496篇 |
2015年 | 325篇 |
2014年 | 455篇 |
2013年 | 3420篇 |
2012年 | 452篇 |
2011年 | 460篇 |
2010年 | 410篇 |
2009年 | 397篇 |
2008年 | 412篇 |
2007年 | 383篇 |
2006年 | 410篇 |
2005年 | 364篇 |
2004年 | 257篇 |
2003年 | 244篇 |
2002年 | 229篇 |
2001年 | 368篇 |
2000年 | 291篇 |
1999年 | 252篇 |
1998年 | 159篇 |
1997年 | 156篇 |
1996年 | 176篇 |
1995年 | 143篇 |
1994年 | 157篇 |
1993年 | 144篇 |
1992年 | 217篇 |
1991年 | 210篇 |
1990年 | 237篇 |
1989年 | 219篇 |
1988年 | 179篇 |
1987年 | 185篇 |
1986年 | 192篇 |
1985年 | 183篇 |
1984年 | 183篇 |
1983年 | 173篇 |
1982年 | 137篇 |
1981年 | 140篇 |
1980年 | 138篇 |
1979年 | 195篇 |
1978年 | 164篇 |
1977年 | 119篇 |
1976年 | 126篇 |
1975年 | 114篇 |
1974年 | 99篇 |
1973年 | 108篇 |
1971年 | 117篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
81.
Nathan Walter Sheila T. Murphy Erica L. Rosenthal 《Communication Research Reports》2018,35(5):402-412
The study explored the role of second-screen use and binge-watching in moderating entertainment education (EE) effects. A pretest/posttest experiment of 273 viewers of East Los High measured the effects of exposure to three subplots, concerning alcohol abuse, abortion, and immigration. The effect of identification with characters on change in attitudes was significantly moderated by second-screen use and binge-watching. In particular, second-screening tended to enhance the positive impact of identification; whereas, among respondents who binge-watched the show, the effects of identification were weaker. 相似文献
82.
Stacy L. Young Manuel D. Pulido Catherine F. Brooks 《Communication Research Reports》2018,35(2):172-177
This study extends instructional communication research on extra-class communication (ECC) by presenting an integrative analysis comparing the explanatory utility of student- and instructor-oriented reasons for student engagement in frequent ECC. Results from 495 college students suggested that student-oriented reasons, specifically the relational and functional student motives, were the only significant, positive predictors of students’ perceptions of frequent ECC engagement. Other student motives (excuse making, participation, sycophancy) and perceptions of instructor approachability did not significantly predict perceived frequency of ECC engagement. 相似文献
83.
Jayson L. Dibble 《Communication Research Reports》2018,35(2):112-120
Is the reluctance to share bad news (i.e., the MUM effect) motivated more by a public display or private concern, and does it benefit mainly the messenger or the recipient? An experiment (N = 309) that crossed good/bad news with three communication channels (face-to-face, text messaging, e-mail) revealed that messenger reluctance was greatest under conditions of bad news and did not vary based on the channel through which the recipient contacted the messenger. In contrast with earlier work, this MUM effect was more consistent with a private fear of distressing the recipient. Theoretical implications and limitations are discussed. 相似文献
84.
Raymond J. Pingree Elizabeth Stoycheff Mingxiao Sui Jason T. Peifer 《Mass Communication and Society》2018,21(5):555-584
The mere perception that news has given certain problems more coverage can lead the audience to assume that those problems are more important. Given that the news media, at times, obsesses over relatively trivial matters, and given that the audience is increasingly able to filter media exposure, it is worth asking what happens when audience members perceive that recent media coverage has not emphasized any very important problems. In such cases, audience members might assume that any problems facing the nation must not be particularly important. We explicate this attitude of political complacency, test whether perceived media agendas lacking important problems can influence it, and explore whether complacency helps explain political disengagement. We also explore whether these effects generalize beyond news, to new media gatekeepers such as Twitter. Two experiments tested effects of a perceived absence of important problems in recent news or Twitter content. In the case of news, but not Twitter, this increased complacency in both studies. Study 2 added a no-exposure control and found that effects on complacency were driven by the cueing of nonproblem stories, not by the absence of problem story cues. Both studies validated complacency as a predictor of political disengagement. 相似文献
85.
86.
87.
88.
89.
Jason Power Raymond Lynch Oliver McGarr 《British journal of educational technology : journal of the Council for Educational Technology》2020,51(1):281-296
Serious games are becoming increasingly popular due to their association with increased learning outcomes when compared to traditional self-regulated learning activities. However, the majority of research examining the outcomes of serious games has focused almost exclusively on learning outcomes. This has resulted in a lack of research examining why these types of games result in increased positive outcomes, such as engagement or performance. This study seeks to address this gap in existing research by examining the relationship between game difficulty and participants’ engagement, performance and self-efficacy in a Pacman style maze navigation game. This required the use of hidden difficulty variations which participants were randomly assigned. Participants engaged with the game over a 5-days practice period. Results from this study suggest that difficulty plays a considerable role in influencing participants’ self-efficacy for the task. Self-efficacy has been consistently linked to positive outcomes such as increased engagement and performance. This highlights the importance of difficulty as a game design factor as well as providing an insight into the manner in which serious games could be further refined in order to increase user’s self-efficacy and associated positive outcomes. Implications for future serious games and self-efficacy research are discussed. 相似文献
90.