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   12453篇
  免费   297篇
管理学   1431篇
民族学   53篇
人口学   1098篇
丛书文集   78篇
教育普及   2篇
理论方法论   1174篇
综合类   338篇
社会学   6368篇
统计学   2208篇
  2021年   65篇
  2020年   193篇
  2019年   225篇
  2018年   250篇
  2017年   370篇
  2016年   286篇
  2015年   231篇
  2014年   256篇
  2013年   2064篇
  2012年   399篇
  2011年   320篇
  2010年   213篇
  2009年   236篇
  2008年   263篇
  2007年   281篇
  2006年   216篇
  2005年   352篇
  2004年   297篇
  2003年   255篇
  2002年   252篇
  2001年   305篇
  2000年   283篇
  1999年   293篇
  1998年   199篇
  1997年   199篇
  1996年   209篇
  1995年   182篇
  1994年   194篇
  1993年   168篇
  1992年   221篇
  1991年   219篇
  1990年   199篇
  1989年   210篇
  1988年   191篇
  1987年   181篇
  1986年   184篇
  1985年   172篇
  1984年   201篇
  1983年   191篇
  1982年   160篇
  1981年   131篇
  1980年   134篇
  1979年   160篇
  1978年   132篇
  1977年   113篇
  1976年   98篇
  1975年   93篇
  1974年   89篇
  1973年   87篇
  1971年   63篇
排序方式: 共有10000条查询结果,搜索用时 31 毫秒
1.
2.
Scholars consistently find that parents provide economic support to their young adult children through the transition to adulthood. However, scholars rarely examine whether young adults contribute monetary resources to their parents. To test this proposition, I use the National Longitudinal Study of Adolescent to Adult Health, and the case of “money for living expenses.” Overall, monetary independence is the modal category for all groups. However, when I compare across groups, I find that White young adults with native-born parentage are more likely to report monetary independence, African Americans are more likely to report monetary interdependence and Asian and Latino children of immigrants are more likely to report child-to-parent assistance compared to each other, with SES explaining most, but not all, of these differences. I argue that young adult offspring in non-White families are more likely to provide monetary support to their parents during the transition to adulthood. These transfers may deplete resources for non-White young adults and may exacerbate racial/ethnic inequality during the transition to adulthood.  相似文献   
3.
We sought to evaluate the efficacy of successive matching training for establishing generalized reflexive matching across 4 children with autism. In Experiment 1, differential reinforcement with delay fading was efficacious in establishing “yes” and “no” matching and nonmatching responses in 2 participants when 2 identical or nonidentical picture stimuli were presented. In addition, emergent visual–visual reflexive relational responses were observed using novel picture stimuli in a transfer test phase. In Experiment 2, differential reinforcement alone was efficacious in establishing matching and nonmatching responses in the other 2 participants when 2 identical or nonidentical objects were presented. Transfer to identical objects presented through touch (i.e., tactile discrimination) was additionally observed for both participants. Procedures in the study were adapted from the PEAK Relational Training System to aid in clinical replication, and the translational results have implications for language training with individuals with autism.  相似文献   
4.
The authors investigated whether trends in attitudes about gender were consistent with the gender stall primarily occurring in the family domain and examined potential mechanisms associated with changing gender norms. Using data from Monitoring the Future surveys (1976–2015), the authors assessed three components of trends in youth's beliefs about gender: the marketplace, the family, and mothers' employment. Findings showed continued increases in egalitarianism from 1976 through the mid‐1990s across all three dimensions. Thereafter, support for egalitarianism in the public sphere plateaued at high levels, rising support for mothers' employment persisted at a slower pace, and conventional ideology about gender in families returned. The changing demographic composition of American high school students did not account for the gender attitude trends. Youth's mothers' employment and increased education were related to increased egalitarianism. Changes in population averages of mothers' employment and educational attainment were only weakly associated with increases in egalitarian attitudes.  相似文献   
5.
Using clinically relevant research methodology, this study focuses on differences (cross‐partner difference scores) in perceptions of attachment behaviors (emotional accessibility, responsiveness, and engagement) between partners in couples therapy. In general, findings suggest that higher levels of self‐enhancement attachment behaviors (participant perceives self as demonstrating more attachment behaviors than the partner's ratings of the participant) are associated with lower relationship satisfaction and greater relationship instability. The association between attachment behavior difference scores and measures of relationship health is mediated through partner perceived positive communication. These results suggest that differences in perceptions between partners’ level of attachment behaviors are an important clinical construct for therapy. As such, clinical recommendations for addressing self‐enhancing attachment behaviors, and the mediating role of positive communication, are discussed with recommendations for researchers.  相似文献   
6.
The CCR model by Charnes et al. (Eur J Oper Res 2:429–444, 1978) together with the BCC model by Banker et al. (Manag Sci 30:1078–1091, 1984) are the most popular approaches of measuring efficiency among a group of decision making units, DMUs, in data envelopment analysis, DEA. The right choice of a DEA model—CCR or BCC—often, if not always, is a difficult decision. To evaluate a DMU’s efficiency for both models might be helpful, but it does not always capture the essential issues at stake. In this paper we propose a comparative analysis of both concepts: How does activity scaling under constant BCC-efficiency influence CCR-efficiency. And inversely, how does BCC-efficiency behave when activity scaling under constant CCR-efficiency is applied. Such findings of mutual effects improve a DMU’s ability to reassess upsizing and downsizing of activities. Moreover, it allows for exact calculations of the resulting economic effects, and these effects give new insights beyond classical DEA. Finally, scale efficiency turns out to be the ideal concept to control these activity changes, rather than just CCR- or BCC-efficiency. We use a little numerical example to emphasize advantages of the new concept and sketch the new findings for a theater scenery.  相似文献   
7.
This paper contributes to the ongoing debate on the nature of living apart together (LAT) relationships by focusing on two contrasting family settings: France and Italy. First, we corroborate the view that being “single” in residential terms does not mean being “without a partner” in relationship terms. To assume otherwise would be an erroneous characterisation of more than one quarter of the individuals in both countries. Second, our findings cannot be reconciled with any notion of a simple, uniform, and uni-directional view of LAT relationships. In Italy, LAT relationships are popular in the early phases of the life course, when young adults must often face difficult economic situations as well as social pressure to marry. In France, LAT relationships are more the result of a conscious choice, especially in later phases of the life course. We discuss these results in light of the second demographic transition narrative.  相似文献   
8.
Disaster research has drawn attention to how natural hazards transform local organizational dynamics and social inequalities. It has yet to examine how these processes unfold together over time. We begin to fill this gap with a county-level, longitudinal analysis that examines how property damages from natural hazards correlate not only with local shifts in poverty a year later but also counts of for-profit as well as bonding and bridging social capital organizations. Results show that poverty and all organizational types tend to increase with local hazard damages. They also show that poverty tends to increase most where the number of bonding social capital organizations is also increasing. This pattern suggests a Janus-faced dynamic in which bonding, or more inwardly focused, organizations that arise after disaster may end up inadvertently marginalizing those in more dire need.  相似文献   
9.
This study takes an exploratory, qualitative approach to examine college students’ perceptions about divorce in the media. Findings suggest that participants perceived both positive and negative representations of divorced families in the media they consume, highlighting the complex nature of navigating and communicating through a divorce. Specifically, college students reported on aspects of the ex-spousal relationship, how children are affected, and the contrast between life pre- and postdivorce. An inductive theme analysis revealed several positive and negative media representations of divorce. Largely, college students perceive media messages about divorce to be accurate portrayals and impactful representations.  相似文献   
10.
Although the rate of posttraumatic stress disorder (PTSD) among survivors of child maltreatment is high, individuals differ in symptom severity and many do not experience clinically significant levels of psychopathology. The present study tested the indirect effects of child maltreatment severity on adult PTSD, suicidal ideations, and alcohol dependence via anxiety sensitivity. A sample of 336 participants (mean age of 22.81 years, SD = 8.93; 70.2% female) completed an online survey of child abuse and neglect, anxiety sensitivity, PTSD symptom severity, suicidal ideation severity, and alcohol dependence severity. The results revealed significant indirect effects of child maltreatment on PTSD symptom severity through cognitive and social concerns, but not physical concerns. No direct or indirect effects were demonstrated for suicidal ideations or alcohol dependence severity. These findings elucidate mechanisms in the robust relationship between child maltreatment and adult PTSD symptoms and can potentially inform future research on mechanisms of change in psychotherapy.  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