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   16657篇
  免费   225篇
  国内免费   54篇
教育   12305篇
科学研究   1161篇
各国文化   173篇
体育   1195篇
综合类   44篇
文化理论   78篇
信息传播   1980篇
  2021年   180篇
  2020年   228篇
  2019年   350篇
  2018年   495篇
  2017年   531篇
  2016年   495篇
  2015年   322篇
  2014年   455篇
  2013年   3339篇
  2012年   448篇
  2011年   458篇
  2010年   403篇
  2009年   397篇
  2008年   412篇
  2007年   385篇
  2006年   406篇
  2005年   357篇
  2004年   250篇
  2003年   243篇
  2002年   223篇
  2001年   365篇
  2000年   286篇
  1999年   248篇
  1998年   157篇
  1997年   153篇
  1996年   167篇
  1995年   140篇
  1994年   153篇
  1993年   135篇
  1992年   211篇
  1991年   209篇
  1990年   236篇
  1989年   214篇
  1988年   173篇
  1987年   181篇
  1986年   188篇
  1985年   175篇
  1984年   179篇
  1983年   167篇
  1982年   134篇
  1981年   136篇
  1980年   132篇
  1979年   190篇
  1978年   160篇
  1977年   113篇
  1976年   119篇
  1975年   111篇
  1974年   99篇
  1973年   104篇
  1971年   116篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
991.
This study examined parent-child emotion discourse, children's independent social information processing, and social skills outcomes in 146 families of 8-year-olds with and without developmental delays. Children's emergent social-cognitive understanding (internal state understanding, perspective taking, and causal reasoning and problem solving) was coded in the context of parent-child conversations about emotion, and children were interviewed separately to assess social problem solving. Mothers, fathers, and teachers reported on children's social skills. The proposed strengths-based model partially accounted for social skills differences between typically developing children and children with delays. A multigroup analysis of the model linking emotion discourse to social skills through children's prosocial problem solving suggested that processes operated similarly for the two groups. Implications for ecologically focused prevention and intervention are discussed.  相似文献   
992.
These studies investigated two hundred and forty-four 24- and 30-month-olds' sensitivity to generic versus nongeneric language when acquiring knowledge about novel kinds. Toddlers were administered an inductive inference task, during which they heard a generic noun phrase (e.g., "Blicks drink milk") or a nongeneric noun phrase (e.g., "This blick drinks milk") paired with an action (e.g., drinking) modeled on an object. They were then provided with the model and a nonmodel exemplar and asked to imitate the action. After hearing nongeneric phrases, 30-month-olds, but not 24-month-olds, imitated more often with the model than with the nonmodel exemplar. In contrast, after hearing generic phrases, 30-month-olds imitated equally often with both exemplars. These results suggest that 30-month-olds use the generic/nongeneric distinction to guide their inferences about novel kinds.  相似文献   
993.
The authors used a large sample of children (N ≈ 7,400) participating in the Early Childhood Longitudinal Study--Kindergarten Cohort (ECLS-K) to estimate kindergarten children's academic achievement growth trajectories in reading and mathematics. The authors were particularly interested in whether the growth trajectories of children with learning disabilities (LD) or speech language impairments (SLI)--as well as those of other groups of children--were consistent with a cumulative or compensatory developmental cycle. Both LD and SLI children displayed significantly lower levels of kindergarten reading achievement than nondisabled children. However, and over the subsequent 5 years of elementary school, only children with SLI lagged increasingly behind nondisabled peers in their reading skills growth. The authors observed a different pattern for mathematics achievement. Children with LD, but not SLI, lagged increasingly behind nondisabled children in their mathematics skills growth. The authors also observed some consistency in "poor-get-poorer" effects across reading and mathematic achievement for additional population subgroups. Those kindergarten children who were from lower socioeconomic status families, who were African American, and who more frequently displayed learning-related behavior problems initially had lower levels of reading and mathematics achievement and also lagged increasingly behind in their acquisition of these skills over time. Some groups of children, including those with SLI, experience a cumulative rather than a compensatory cycle of achievement growth.  相似文献   
994.
The purpose of this study was to analyze how school psychologists engaged in problem analysis during problem‐solving consultation. Five aspects of the problem analysis process were examined: 1) the types of questions participants asked during problem identification, 2) the types of data participants requested, 3) the frequency of requests for each type of data, 4) the use of multiple methods and sources of data across multiple domains, and 5) the criteria used to interpret the data. Four school psychologists were recruited to each complete three fictional consultation cases within a computer‐simulated environment. A qualitative case study method was used. The results of this study revealed how school psychologists used theory, a multidimensional assessment framework, and self‐referent data to analyze a problem. Implications for future research are discussed. © 2011 Wiley Periodicals, Inc.  相似文献   
995.
Research that clearly demonstrates the negative effects of institutionalization, particularly for young children, has been critical for changing policy. However, actually putting science into action requires advocacy, persistence, and perseverance. Policy makers and advocates must be informed about the research and use it effectively. This paper proposes a number of key components for translating research into policy and programs: analyzing the situation, using evidence to build the case for action, developing policies, building program capacity in child welfare and early childhood development, creating a family‐based child welfare system, and developing a system of monitoring and accountability. Much of the knowledge in this paper comes from experiences, desk reviews, and case studies of successful practices. Research provides the basis, but moving research to practice depends on collaboration between researchers who understand the key policy perspectives and policy makers who understand the research.  相似文献   
996.
Perceived competence is a key motivational determinant of physical activity behaviours in adolescents, and motivational determinants are influenced by the class environment. The purpose of this study was to investigate levels of perceived physical competence, enjoyment and effort in class, focusing on gender and class‐type differences. Participants were 546 adolescents (289 males, 257 females) who were in same‐sex or coeducational physical education classes. The Hierarchical Physical Competence Scale (HPCS) and questionnaire measures of enjoyment and effort in classes were used to investigate students’ perceptions. Results of 2 × 2 multivariate analysis of variance (MANOVA) indicated that students’ perceptions of physical competence, enjoyment and effort in classes differed according to gender and class type, but these differences must be viewed in light of strong interaction effects. That is, female students reported more positive and adaptive perceptions in same‐sex classes and were more affected by class type than were male students.  相似文献   
997.

Objective

The primary research objective was to explore the relationship between trajectories of maternal verbal aggression (VA) experienced by low-income, community middle school students across a three-year period and outcomes that have been found to be related to VA in previous work, including a negative view of self and social problems.

Method

Longitudinal data were collected from 421 youth (51.8% male) attending two middle schools over 3 years using a multiple-informant survey design. K-means cluster analysis was used to identify trajectories of VA using youth ratings of the Conflict Tactics Scale: Parent-Child (Straus, Hamby, Finkelhor, Moore, & Runyan, 1998). Dependent variables were self-reported depression, self-esteem, delinquency, and peer victimization as well as peer-rated aggression and sensitive-isolated reputation.

Results

Four trajectory groups of VA were identified: Low Stable, Increasing, Decreasing, and High Stable. The 3-year average occurrence of VA was: 1.31, 9.18, 10.24, and 31.14 instances, respectively. Gender-specific MANOVAs revealed dramatic differences between the High Stable and Low Stable groups. High Stable boys reported significantly more depressive symptoms, delinquency, peer overt and relational victimization, and were less likely to have a sensitive/isolated reputation than Low Stable boys. High Stable girls reported significantly more depressive symptoms, low self-esteem, delinquency, peer overt and relational victimization and were rated by peers as having more aggressive/disruptive and relationally aggressive reputations than Low Stable girls. Girls in the High Stable group were more likely than other youth to report levels of depressive symptoms and delinquency >1 SD above the mean, while boys in the High Stable group were more likely to report levels of delinquency >1 SD above the mean. The Increasing and Decreasing groups also demonstrated significantly poorer functioning than the Low Stable group on most outcomes. Growth curve analysis revealed that VA showed a contemporaneous association with self-reported delinquency suggesting these factors are closely related.

Conclusions

Any level of VA greater than the 1–2 instances per year reported by youth in the Low Stable group was associated with less favorable outcomes.  相似文献   
998.
Peer assessment has been gaining significant ground as a means of fostering an environment of accountability and responsibility for group projects in higher education. A popular peer assessment method assigns individual grades via a linear relationship to peer assessment scores. Using this method, a group member who receives his or her group’s average peer assessment score is assigned the instructor‐given group grade; the group member who receives a total peer assessment score of zero is assigned an individual grade of zero. Unfortunately, applying this method often requires time‐consuming exploratory data analysis because of the potential for the method to yield a high spread of grades, including grades over 100%. The present study proposes a modification, which accounts for the degree of student agreement. When the modified procedure results in a change from the group grade, the direction of change is always the same, but with smaller magnitude, requiring less subsequent data analysis and instructor time demands. Easy‐to‐modify SAS code for applying the method is presented in the Appendix.  相似文献   
999.
The purpose of this study was to assess the sources of award-wining research professors’ (six women; six men) teaching self-efficacy through the framework of Bandura’s (1986) social cognitive theory. Semi-structured interviews revealed that mastery experiences and social persuasions were particularly influential sources of self-efficacy and that these sources tended to be closely related. Professors reported that their self-efficacy had generally stabilized within their first few years of assuming a tenure-track position. Participants framed negative events in adaptive ways that had little cost to their teaching self-efficacy.  相似文献   
1000.
文章对图书馆在实施馆员绩效考核过程中面临的诸多困境进行了分析,认为这主要是由思想观念出现偏差、图书馆作为不完全行为能力主体的尴尬地位、馆员素质层次不齐、考核实践模式不健全等原因造成的,进而从绩效考核的准备、实施、监控等阶段论述了破解困境的策略。  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