全文获取类型
收费全文 | 10137篇 |
免费 | 47篇 |
国内免费 | 5篇 |
专业分类
教育 | 6896篇 |
科学研究 | 1183篇 |
各国文化 | 66篇 |
体育 | 749篇 |
综合类 | 4篇 |
文化理论 | 66篇 |
信息传播 | 1225篇 |
出版年
2022年 | 66篇 |
2021年 | 119篇 |
2020年 | 173篇 |
2019年 | 237篇 |
2018年 | 359篇 |
2017年 | 352篇 |
2016年 | 348篇 |
2015年 | 227篇 |
2014年 | 324篇 |
2013年 | 1723篇 |
2012年 | 244篇 |
2011年 | 282篇 |
2010年 | 233篇 |
2009年 | 224篇 |
2008年 | 270篇 |
2007年 | 222篇 |
2006年 | 209篇 |
2005年 | 193篇 |
2004年 | 204篇 |
2003年 | 162篇 |
2002年 | 149篇 |
2001年 | 210篇 |
2000年 | 219篇 |
1999年 | 195篇 |
1998年 | 105篇 |
1997年 | 136篇 |
1996年 | 119篇 |
1995年 | 84篇 |
1994年 | 106篇 |
1993年 | 83篇 |
1992年 | 177篇 |
1991年 | 133篇 |
1990年 | 126篇 |
1989年 | 154篇 |
1988年 | 144篇 |
1987年 | 105篇 |
1986年 | 113篇 |
1985年 | 117篇 |
1984年 | 87篇 |
1983年 | 95篇 |
1982年 | 65篇 |
1981年 | 76篇 |
1980年 | 64篇 |
1979年 | 105篇 |
1978年 | 67篇 |
1977年 | 68篇 |
1976年 | 60篇 |
1975年 | 51篇 |
1974年 | 62篇 |
1973年 | 63篇 |
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
191.
This study utilized data from the Avon Longitudinal Study of Parents and Children (N = 14,860) to examine whether early-life family income (age 0–5) predicted long-term academic achievement (age 16–18) and to investigate the role of executive function (EF) assessed multiple times across age 7–11 in explaining this association. Task-based EF was a significant mediator between early-life family income and later academic achievement in every model. This mediating pathway persisted when adjusting for a comprehensive panel of covariates including verbal IQ, sex, family income at ages 8 and 18, and early-life temperament. Additionally, teacher-rated and parent-rated EF mediated in some models. Overall, these findings suggest that childhood EF may play an important role in perpetuating income-based educational disparities. 相似文献
192.
Parental reactions to children's negative emotions: longitudinal relations to quality of children's social functioning 总被引:7,自引:0,他引:7
Relations between self-reported parental reactions to children's negative emotions (PNRs) and children's socially appropriate/problem behavior and negative emotionality were examined longitudinally. Evidence was consistent with the conclusion that relations between children's externalizing (but not internalizing) emotion and parental punitive reactions to children's negative emotions are bidirectional. Reports of PNRs generally were correlated with low quality of social functioning. In structural models, mother-reported problem behavior at ages 10-12 was at least marginally predicted from mother-reported problem behavior, children's regulation, and parental punitive or distress reactions. Moreover, parental distress and punitive reactions at ages 6-8 predicted reports of children's regulation at ages 8-10, and regulation predicted parental punitive reactions at ages 10-12. Father reports of problem behavior at ages 10-12 were predicted by earlier problem behavior and parental distress or punitive reactions; some of the relations between regulation and parental reactions were similar to those in the models for mother-reported problem behavior. Parental perceptions of their reactions were substantially correlated over 6 years. Some nonsupportive reactions declined in the early to mid-school years, but all increased into late childhood/early adolescence. 相似文献
193.
van Ijzendoorn MH Moran G Belsky J Pederson D Bakermans-Kranenburg MJ Kneppers K 《Child development》2000,71(4):1086-1098
Do siblings develop similar attachment relationships with their mother? Attachment theory suggests that brothers and sisters growing up in the same family are likely to relate in similar ways to their parents, at least when parental attachment representations and interactive styles remain stable across time. In the current study, sibling attachment data from three research groups (from Pennsylvania State University, Leiden University, and the University of Western Ontario) have been pooled to assemble a sufficiently large sample of observations (N = 138 sibling pairs) for a detailed comparison of sibling attachment relationships. Spacing between the births, differences in maternal sensitivity, and gender of siblings were examined as possible sources of concordance of nonconcordance. Attachment security (including disorganized attachment) of each sibling was assessed with the Strange Situation procedure between 12 and 14 months after birth. Maternal sensitivity was observed with the same rating scale in a laboratory play session in one of the studies and in home observations in the others. Sibling relationships were found to be significantly concordant when classified as secure/nonsecure (62% concordance, p < .01, 1-tailed, intraclass correlation = .23) but not when further subcategorized. Maternal insensitivity to both siblings (shared environment) was associated with concordance of sibling nonsecurity. Siblings of the same gender were more likely to form concordant relationships with their mother (68%; p < .01, 1-tailed, intraclass correlation = .37) than those of opposite gender. Same-sex sibling concordance was comparable to the concordance found for monozygotic twins in earlier studies. Genetic factors may, therefore, play a relatively small role in the development of attachment. 相似文献
194.
195.
Antecedents and behavior-problem outcomes of parental monitoring and psychological control in early adolescence 总被引:27,自引:0,他引:27
The early childhood antecedents and behavior-problem correlates of monitoring and psychological control were examined in this prospective, longitudinal, multi-informant study. Parenting data were collected during home visit interviews with 440 mothers and their 13-year-old children. Behavior problems (anxiety/depression and delinquent behavior) were assessed via mother, teacher, and/or adolescent reports at ages 8 through 10 years and again at ages 13 through 14. Home-interview data collected at age 5 years were used to measure antecedent parenting (harsh/reactive, positive/proactive), family background (e.g., socioeconomic status), and mother-rated child behavior problems. Consistent with expectation, monitoring was anteceded by a proactive parenting style and by advantageous family-ecological characteristics, and psychological control was anteceded by harsh parenting and by mothers' earlier reports of child externalizing problems. Consistent with prior research, monitoring was associated with fewer delinquent behavior problems. Links between psychological control and adjustment were more complex: High levels of psychological control were associated with more delinquent problems for girls and for teens who were low in preadolescent delinquent problems, and with more anxiety/depression for girls and for teens who were high in preadolescent anxiety/depression. 相似文献
196.
197.
No one would disagree that scientific research has been unethical—even criminal—at times. Institutional review boards (IRBs) play a fundamental role in protecting people from unethical criminological research. At the same time, IRBs, as social entities, are subject to a wide range of influences that may affect their decisions regarding the ethicality of research. This research note draws on the paradigm of pure sociology and the logic underpinning Black’s theory of law to propose a preliminary theory of IRBs’ (dis)approval of research. Specifically, it suggests that IRBs apply less social control to criminological research involving higher status researchers and lower status research participants and, therefore, those persons are more often involved in research. The paper concludes with theoretically situated, practical advice for how (1) IRBs can reduce their discrimination, and (2) criminological researchers can reduce IRBs’ disapproval of their projects and thereby increase their research output. 相似文献
198.
199.
200.