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   43481篇
  免费   590篇
  国内免费   28篇
教育   31007篇
科学研究   3713篇
各国文化   468篇
体育   3696篇
综合类   18篇
文化理论   377篇
信息传播   4820篇
  2021年   449篇
  2020年   693篇
  2019年   1058篇
  2018年   1427篇
  2017年   1384篇
  2016年   1257篇
  2015年   761篇
  2014年   1102篇
  2013年   8337篇
  2012年   1035篇
  2011年   1092篇
  2010年   822篇
  2009年   867篇
  2008年   958篇
  2007年   884篇
  2006年   790篇
  2005年   719篇
  2004年   722篇
  2003年   630篇
  2002年   631篇
  2001年   819篇
  2000年   812篇
  1999年   716篇
  1998年   442篇
  1997年   436篇
  1996年   517篇
  1995年   461篇
  1994年   412篇
  1993年   402篇
  1992年   593篇
  1991年   597篇
  1990年   584篇
  1989年   606篇
  1988年   539篇
  1987年   564篇
  1986年   543篇
  1985年   621篇
  1984年   500篇
  1983年   480篇
  1982年   410篇
  1981年   381篇
  1980年   392篇
  1979年   560篇
  1978年   417篇
  1977年   381篇
  1976年   329篇
  1975年   293篇
  1974年   314篇
  1973年   284篇
  1971年   301篇
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
991.
This research involves a longitudinal study of antecedents and moderators in the development of antisocial patterns. Participants included 695 boys and girls who were interviewed annually from childhood to the end of high school and again at ages 20 and 24. Cluster analyses identified four configurations of boys and girls that were reasonably homogeneous with respect to behavior and academic performance at the beginning of the investigation. When tracked over time, the configurations differed significantly in patterns of early school dropout and criminal arrests. Boys and girls in the "multiple risk configuration" were more likely than those in other configurations to show long-term antisocial patterns. Participation in school extracurricular activities was associated with reduced rates of early dropout and criminal arrest among high-risk boys and girls. The decline in antisocial patterns was dependent on whether the individuals' social network also participated in school extracurricular activities.  相似文献   
992.
993.
Increasing evidence indicates that individuals with Intellectual Disabilities (ID) might benefit from phonics‐based reading instruction. However, research and instruction in this field has predominantly focused on sight word reading. Models for complex interventions recommend that feasibility research be conducted prior to conducting randomised studies to assess efficacy of interventions (Thabane et al., 2010). The aim of the current paper is therefore to investigate feasibility questions relating to conducting a full‐scale randomised controlled trial (RCT) evaluation of an online, phonics‐based reading programme (Headsprout? Early Reading; HER) with children with ID. Employing a randomised pre‐test post‐test group design, this study explores and trials important aspects of a RCT evaluation to inform a full‐scale RCT. We also found that HER had a significant effect on reading skills when compared with ‘education as usual’, with large effect sizes on the main outcome measure. This indicates that further, more robust evaluations using HER with children with ID are a worthwhile pursuit.  相似文献   
994.
This study explored kindergartners' and first graders' collaborative processes to understand the nature of peer collaboration and the learning opportunities afforded by peer discourse. Data were drawn from 6 dyads who participated in a computer writing project for 2 school semesters. Children's videotaped interactions were analyzed with the focus on understanding how children's collaborative roles and patterns changed over time. Examination of video data and children's computer products revealed that (a) children's interaction patterns changed from a more independent style toward a more integrative style, as shown in their distribution of control over mouse and keyboard and in the written outcomes of their collaboration; (b) a shift in role patterns emerged across repeated instances of peer collaboration so that children began alternating the roles of leader and observer, and less competent children began carrying out more important tasks; and (c) the computer served as an object of reference for children to sustain their interaction and stay on task.  相似文献   
995.
Composite reading scores obtained from parents of 125 reading-disabled children and 125 matched control children who participated in the Colorado Family Reading Study were used to test the validity of self-reported reading problems. Parents who reported that they encountered serious difficulty learning to read had significantly lower reading scores than did those who reported no positive history of reading problems. Moreover, this difference was larger for parents of reading-disabled children than for those of controls. Thus, parental self-reports provide a valid index of reading problems.  相似文献   
996.
The monkey’s capacity to extract tonal pattern from a sequence of tones was assessed in four subjects that had the benefit of substantial past experience in discriminating, matching, and remembering acoustic stimuli. In Experiment 1, the monkeys failed to transfer their well-established matching behavior to the matching of two structured sequences of tones that differed primarily in tonal pattern, indicating that for them tonal pattern was not a salient feature of the acoustic stimuli. Experiment 2 was an attempt to encourage tonal pattern perception by employing, within a discrimination paradigm, very simple tonal patterns and multiple exemplars of the positive and negative patterns; the transfer design, borrowed from Hulse and Cynx (1985), was a powerful one for revealing tonal pattern perception. Verifying earlier results from our laboratory, there was little in the monkeys’ transfer performance to indicate that they had extracted tonal pattern from the acoustic stimuli. Major discriminative control seemed to be vested in the first tone of each exemplar. This apparent cognitive limitation may be rather general among animals, perhaps reflecting an intimate connection between the capacity for tonal pattern perception and that for acoustically based language.  相似文献   
997.
998.
Across the country, states are reporting increases in the number of children with autism enrolled in the education system. Although a few specific treatment methods have been established as efficacious for some children with autism in controlled settings, research examining the translation of these treatments into early intervention programs has been minimal. The current study examined provider self-reports of the use of interventions in community settings through focus groups. Providers report the use of both evidence-based and non-evidence-based techniques and indicate that they often combine and modify these techniques based on child, personal, and external factors. Few providers had a clear understanding of evidence-based practice, and all providers reported concerns about adequate training. Implications for early intervention research are discussed.  相似文献   
999.
This cross-sectional study examined the private speech and task-related activity of 108 school-aged children while they drew pictures of real objects (i.e., a house, a person, and an animal) and make-believe objects (i.e., a house, a person, and an animal) to investigate developmental and task-related changes in self-regulation. Composite scores for each first-grade (N=36), third-grade (N=36), and fifth-grade (N=36) participant were calculated from the repeated raw frequencies of overall private speech and private speech in conjunction with task-related behavior during the two types of drawing activities (i.e., real and make-believe). Scores were then analyzed using regression analysis and 3×2 (Grade×Task Type) ANOVA’s to explore study hypotheses. This study found that: (1) there was a concave curvilinear developmental trend in overall private speech production, (2) participants utilized more private speech during heuristic (i.e., make-believe) drawing tasks than algorithmic (i.e., real) drawing tasks, and (3) school-aged children used private speech in conjunction with task-related behavior in a different manner during the two types of drawing activities. These findings contribute to the Vygotskian perspective regarding the development and function of private speech.  相似文献   
1000.
Reforms in engineering education have caused a shift from the traditional stand-alone course in technical communication for Engineering students towards communication training integrated in courses and design projects that allows students to develop four layers of competence. This shift creates opportunities for realistic and situated learning, but offers challenges for assessment of communication competence at student, course and program levels. On the basis of a detailed definition of communicative competence, three formats for integrated communication training are described: Linked to design projects, integrated in design projects and integrated at program level. Assessment of communication competence in these formats is constrained by their characteristics with regard to student motivation, individual and group work, and situated learning.  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