收费全文 | 5440篇 |
免费 | 306篇 |
国内免费 | 11篇 |
2023年 | 53篇 |
2022年 | 57篇 |
2021年 | 70篇 |
2020年 | 140篇 |
2019年 | 154篇 |
2018年 | 209篇 |
2017年 | 196篇 |
2016年 | 245篇 |
2015年 | 135篇 |
2014年 | 171篇 |
2013年 | 615篇 |
2012年 | 252篇 |
2011年 | 309篇 |
2010年 | 189篇 |
2009年 | 189篇 |
2008年 | 279篇 |
2007年 | 268篇 |
2006年 | 230篇 |
2005年 | 201篇 |
2004年 | 193篇 |
2003年 | 195篇 |
2002年 | 174篇 |
2001年 | 90篇 |
2000年 | 74篇 |
1999年 | 65篇 |
1998年 | 64篇 |
1997年 | 43篇 |
1996年 | 46篇 |
1995年 | 53篇 |
1994年 | 52篇 |
1993年 | 42篇 |
1992年 | 47篇 |
1991年 | 32篇 |
1990年 | 36篇 |
1989年 | 34篇 |
1988年 | 32篇 |
1987年 | 27篇 |
1986年 | 30篇 |
1985年 | 36篇 |
1984年 | 34篇 |
1983年 | 31篇 |
1982年 | 25篇 |
1980年 | 30篇 |
1979年 | 27篇 |
1978年 | 36篇 |
1977年 | 25篇 |
1976年 | 23篇 |
1975年 | 20篇 |
1974年 | 25篇 |
1973年 | 21篇 |
This study evaluated the internal and external validity of self-report and parent-report measures of sluggish cognitive tempo (SCT) in South Korean adolescents. Adolescents (N =?469, ages 13–17 years; 50.2% boys) completed self-report measures of SCT and attention-deficit/hyperactivity disorder inattention (ADHD-IN) in addition to measures of internalizing and externalizing psychopathology, social problems, and grades. Parents rated adolescents on SCT, ADHD-IN, internalizing and externalizing psychopathology, and social problems. Using adolescent self-report, 11 of 15 SCT symptoms showed convergent and discriminant validity with ADHD-IN. Using parent-report, all 15 SCT symptoms showed convergent and discriminant validity with ADHD-IN. For within source analyses, SCT showed unique and stronger associations than ADHD-IN with internalizing psychopathology whereas ADHD-IN showed unique and stronger associations than SCT with externalizing psychopathology. SCT and ADHD-IN showed similar unique associations with social problems, whereas ADHD-IN was more strongly related than SCT to grades. Across source analyses also supported the differential unique associations of SCT and ADHD-IN with internalizing and externalizing psychopathologies. This study provides initial evidence for the internal and external validity of SCT with South Korean adolescents, extending support for the transcultural validity of SCT to the important developmental period of adolescence.
相似文献This systematic review aimed to examine sleep associations in a) typically developing children and their parents, and b) children with neurodevelopmental disorders and their parents. Literature search was conducted on PubMed, PsycINFO, EMBASE and Scopus databases for articles examining sleep associations between parents and children. Thirty studies were included in the final review. Based on the first aim, sleep associations between parents and typically developing children were observed for sleep quality, sleep duration and sleep efficiency. However, evidence for associations between sleepiness levels in parents and children and sleep schedules related to bedtime or waketime was limited. Based on the second aim, children with neurodevelopmental disorders and their parents reported greater sleep disturbances in comparison to typically developing children and their parents. The review concluded that sleep in parents and children is interrelated across a number of sleep parameters. It also revealed some preliminary evidence on bidirectionality in parent-child sleep, which warrants further examination. The review highlights the need to examine the mediating role of environmental factors on the interactions between parent-child sleep. Rigorous, longitudinal designs should be employed to explore the pathways through which parents may impact their children’s sleep and functioning and vice-versa.
相似文献