全文获取类型
收费全文 | 4292篇 |
免费 | 126篇 |
专业分类
各国政治 | 290篇 |
工人农民 | 191篇 |
世界政治 | 374篇 |
外交国际关系 | 241篇 |
法律 | 1852篇 |
中国政治 | 22篇 |
政治理论 | 1389篇 |
综合类 | 59篇 |
出版年
2021年 | 20篇 |
2020年 | 58篇 |
2019年 | 65篇 |
2018年 | 91篇 |
2017年 | 108篇 |
2016年 | 131篇 |
2015年 | 76篇 |
2014年 | 110篇 |
2013年 | 719篇 |
2012年 | 94篇 |
2011年 | 123篇 |
2010年 | 109篇 |
2009年 | 103篇 |
2008年 | 130篇 |
2007年 | 150篇 |
2006年 | 124篇 |
2005年 | 118篇 |
2004年 | 126篇 |
2003年 | 132篇 |
2002年 | 167篇 |
2001年 | 92篇 |
2000年 | 97篇 |
1999年 | 94篇 |
1998年 | 72篇 |
1997年 | 88篇 |
1996年 | 64篇 |
1995年 | 55篇 |
1994年 | 48篇 |
1993年 | 56篇 |
1992年 | 59篇 |
1991年 | 70篇 |
1990年 | 50篇 |
1989年 | 65篇 |
1988年 | 54篇 |
1987年 | 47篇 |
1986年 | 61篇 |
1985年 | 56篇 |
1984年 | 40篇 |
1983年 | 64篇 |
1982年 | 52篇 |
1981年 | 44篇 |
1980年 | 39篇 |
1979年 | 34篇 |
1978年 | 29篇 |
1977年 | 28篇 |
1976年 | 32篇 |
1975年 | 21篇 |
1974年 | 30篇 |
1972年 | 16篇 |
1971年 | 17篇 |
排序方式: 共有4418条查询结果,搜索用时 15 毫秒
161.
162.
163.
Richard A. Warshak 《Family Court Review》2020,58(2):432-455
Involvement in custody cases that include accusations of parental alienation—whether as an evaluator, expert witness, lawyer, judge, therapist, provider of a specialized intervention, or researcher—incurs both professional and personal risks. Some risks relate to false negative or false positive identifications of parental alienation that can lead to regulatory agency complaints and public condemnation by the parent who feels wronged by the case outcome. Other risks stem from providing services in an emerging area of practice and working with children who overtly oppose repairing the relationship with their rejected parent. These risks include: unfounded accusations of mistreating children; negatively biased commentary and sensationalist attacks in the media and in social media, professional conferences and journals, and in courtroom testimony; harassment, vilification, and invasion of privacy; threats of violence and public humiliation; shunning and rumor spreading by colleagues; and complaints to regulatory agencies. This article examines circumstances, beliefs, and dynamics that give rise to these risks, suggests precautions to reduce the risk of false accusations against professionals, and offers recommendations for dealing with regulatory agencies. Criticisms that a court or service provider has mistreated a child merit careful scrutiny in the context of the case evidence and empirical data. While some interventions for alienated children raise legitimate concerns, others have been maligned by anecdotal complaints that studies show do not represent the experience of most participants. 相似文献
164.
Bartos Bradley J. Newark Carol McCleary Richard 《Journal of Experimental Criminology》2020,16(2):247-264
Journal of Experimental Criminology - This paper reports a quasi-experimental evaluation of California’s 1996 medical marijuana law (MML), known as Proposition 215, on statewide motor vehicle... 相似文献
165.
美国未成年人司法制度的发展 总被引:8,自引:0,他引:8
本文旨在介绍美国的未成年人司法制度。文中除了介绍其不同于成年人的司法制度之处以外,还特别介绍此制度近期的发展,着重于停止按未成年人司法程序审判(移交成年人法庭)、校园暴力、未成年人团伙及“三击不中”政策等。 相似文献
166.
Pamela Qualter Ruth Hurley Alice Eccles Janice Abbott Michel Boivin Richard Tremblay 《Journal of youth and adolescence》2018,47(7):1385-1397
Adolescents who do not conform to weight ideals are vulnerable to disapproval and victimization from peers in school. But, missing from the literature is a prospective examination of weight status and feelings of loneliness that might come from those experiences. Using data from the Québec Longitudinal Study of Child Development, we filled that gap by examining the prospective associations between loneliness and weight status when the sample was aged 10–13 years. At ages 10, 12, and 13 years, 1042 youth (572 females; 92% from French speaking homes) reported on their loneliness and were weighed and measured. Family income sufficiency was included in our analyses given its relationship with weight status, but also its possible link with loneliness during early adolescence. The findings showed that (1) weight status and loneliness were not associated concurrently; (2) weight status predicted increases in loneliness from ages 12 to 13 years; and (3) loneliness predicted increases in weight from ages 12 to 13 years among female adolescents, but weight loss among male adolescents. The fact that loneliness was involved in weight gain for females suggests that interventions focused on reducing loneliness and increasing connection with peers during early adolescence could help in reducing obesity. 相似文献
167.
Christopher Cambron Rick Kosterman Richard F. Catalano Katarina Guttmannova J. David Hawkins 《Journal of youth and adolescence》2018,47(2):369-382
There is broad agreement that neighborhood contexts are important for adolescent development, but there is less consensus about their association with adolescent smoking and alcohol use. Few studies have examined associations between neighborhood socioeconomic contexts and smoking and alcohol use while also accounting for differences in family and peer risk factors for substance use. Data drawn from the Seattle Social Development Project (N?=?808), a gender-balanced (female?=?49%), multiethnic, theory-driven longitudinal study originating in Seattle, WA, were used to estimate trajectories of smoking and alcohol use from 5th to 9th grade. Time-varying measures of neighborhood socioeconomic, family, and peer factors were associated with smoking and alcohol use at each wave after accounting for average growth in smoking and alcohol use over time and demographic differences. Results indicated that living in more socioeconomically disadvantaged neighborhoods, lower family income, lower family general functioning, more permissive family smoking environments, and affiliation with deviant peers were independently associated with increased smoking. Lower family functioning, more permissive family alcohol use environments, and deviant peers were independently associated with increased alcohol use. The effect of neighborhood disadvantage on smoking was mediated by family income and deviant peers while the effect of neighborhood disadvantage on alcohol use was mediated by deviant peers alone. Family functioning and family substance use did not mediate associations between neighborhood disadvantage and smoking or alcohol use. The results highlight the importance of neighborhood, family, and peer factors in early adolescent smoking and alcohol use. Future studies should examine the unique association of neighborhood disadvantage with adolescent smoking net of family socioeconomics, functioning, and substance use, as well as peer affiliations. Better understanding of the role of contextual factors in early adolescent smoking and alcohol use can help bolster efforts to prevent both short and long harms from substance use. 相似文献
168.
Simone Rosenblum Rebekah L. St. Clair Kimberley R. Isett Reagan Johnson 《Australian Journal of Public Administration》2020,79(4):407-425
Journal editors serve as gatekeepers of knowledge, a role critical to preserving the quality and standards of good research. Some scholars have questioned whether editors have taken advantage of their position to publish their own work. To understand the extent to which editors of public administration journals self-publish, we examined publishing patterns over a 20-year period. We collected the names of editors from the mastheads of 13 generalist public administration journals from 1997 to 2016 and used data indexed from Web of Science to look at articles published in those journals during the same time. We found that while self-publishing behaviour is not common across the entire field, it is a trend for certain journals and individuals. We also found the practice of self-publishing is influenced by whether an individual served in a primary editorial role (e.g., editor-in-chief), length of editorial service, and overall scholarly productivity. We discuss appropriateness and ethical implications of the practice. 相似文献
169.
James J. Mazza Charles B. Fleming Robert D. Abbott Kevin P. Haggerty Richard F. Catalano 《Journal of youth and adolescence》2010,39(6):579-593
Few studies have examined risk factors of childhood and early adolescent depressive symptomatology trajectories. This study
examined self-report depressive symptomatology across a 6-year time period from 2nd to 8th grade to identify latent groups
of individuals with similar patterns of depressive phenomena in a sample of 951 children (440 girls, 511 boys). Analyses,
using semiparametric group modeling (SGM), identified 5 trajectory groups for girls and boys: low depressed stables, low depressed
risers, mildly depressed stables, moderately depressed changers, and moderately depressed risers. Individual risk factors,
with the exception of shy/withdrawn behavior, were significantly different across trajectory group membership for boys and
girls, as was low-income status for boys. Boys in the low depressed and mildly depressed stable trajectory groups had significantly
higher levels of antisocial behavior, attention problems, and lower social competency compared to girls in similar groups.
These results suggest that universal prevention programs implemented in early elementary school that target selected risk
factors may be helpful in reducing future adolescent mental health problems, specifically depressive symptomatology. 相似文献
170.
Edmond P. Bowers Yibing Li Megan K. Kiely Aerika Brittian Jacqueline V. Lerner Richard M. Lerner 《Journal of youth and adolescence》2010,39(7):720-735
The understanding of positive development across adolescence rests on having a valid and equivalent measure of this construct across the breadth of this period of life. Does the Positive Youth Development (PYD) construct based on the Five Cs model have satisfactory psychometric properties for such longitudinal measurement invariance? Using longitudinal data derived from the 4-H Study of PYD, we assessed 920 youth (61.6% female) from a racially and ethically diverse sample (67.3% European American) who participated in three waves (Grades 8–10) of data collection. Building on prior findings that the Five Cs (i.e., Competence, Confidence, Connection, Character, and Caring) model of PYD was a robust measure that could be assessed comparably during early adolescence, we tested a hierarchy of second-order confirmatory factor analysis models to assess the extent to which PYD can be measured equivalently across middle adolescence. Evidence was found for strict measurement invariance across three measurement occasions, including equivalence of first-order and second-order factor loadings, equality of intercepts of observed variables, and equality of item uniqueness and disturbances of the first-order factors. These results suggest that PYD can be measured in the same way across measurement occasions, a prerequisite for the study of development. Implications for research and application of being able to measure PYD equivalently across adolescence are discussed. 相似文献