全文获取类型
收费全文 | 19817篇 |
免费 | 365篇 |
国内免费 | 1篇 |
专业分类
管理学 | 2856篇 |
民族学 | 76篇 |
人才学 | 2篇 |
人口学 | 1909篇 |
丛书文集 | 77篇 |
教育普及 | 2篇 |
理论方法论 | 1782篇 |
现状及发展 | 1篇 |
综合类 | 265篇 |
社会学 | 9599篇 |
统计学 | 3614篇 |
出版年
2021年 | 119篇 |
2020年 | 293篇 |
2019年 | 387篇 |
2018年 | 451篇 |
2017年 | 632篇 |
2016年 | 491篇 |
2015年 | 361篇 |
2014年 | 474篇 |
2013年 | 3104篇 |
2012年 | 645篇 |
2011年 | 624篇 |
2010年 | 464篇 |
2009年 | 386篇 |
2008年 | 466篇 |
2007年 | 474篇 |
2006年 | 463篇 |
2005年 | 443篇 |
2004年 | 416篇 |
2003年 | 388篇 |
2002年 | 431篇 |
2001年 | 530篇 |
2000年 | 542篇 |
1999年 | 472篇 |
1998年 | 352篇 |
1997年 | 315篇 |
1996年 | 327篇 |
1995年 | 309篇 |
1994年 | 293篇 |
1993年 | 292篇 |
1992年 | 355篇 |
1991年 | 323篇 |
1990年 | 289篇 |
1989年 | 294篇 |
1988年 | 291篇 |
1987年 | 252篇 |
1986年 | 250篇 |
1985年 | 283篇 |
1984年 | 272篇 |
1983年 | 260篇 |
1982年 | 217篇 |
1981年 | 183篇 |
1980年 | 168篇 |
1979年 | 194篇 |
1978年 | 178篇 |
1977年 | 162篇 |
1976年 | 141篇 |
1975年 | 161篇 |
1974年 | 119篇 |
1973年 | 115篇 |
1971年 | 93篇 |
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
991.
Looking back: the experience of first sexual intercourse and current sexual adjustment in young heterosexual adults 总被引:1,自引:1,他引:0
A young person's first consensual sexual intercourse experience is often a remarkable and memorable experience. However, little systematic information exists regarding contextual factors of first intercourse, the affective salience of the experience, possible effects on sexual attitudes and beliefs, and subsequent sexual development and adjustment. This retrospective study aimed to examine these in a sample of 475 young adults. Overall, young men and women experienced intercourse for the first time around age 17, were in a committed relationship, and reported positive affective responses. Affective reactions to the first sexual intercourse experience, sexual self-efficacy, sexual aversion, and age at first intercourse affected individuals' current sexual adjustment; however, only sexual self-efficacy mediated between first intercourse and current sexual adjustment in young men and women. Older age at first intercourse was associated with less sexual self-efficacy and lower current sexual adjustment for women. This study provides initial data to suggest that the first sexual intercourse experience significantly impacts current sexual adjustment by affecting beliefs about sexual self-efficacy. 相似文献
992.
Kristie J. R. Phillips Charles Hausman Elisabeth S. Larsen 《The Sociological quarterly》2012,53(2):264-294
Data from one urban school district is analyzed to examine equity‐based arguments about school choice as they pertain to intradistrict transfer policies. We specifically examine which factors influence the propensity for parents to participate in choice, and how choice schools differ from the schools that students are zoned to attend. We find that advantaged and disadvantaged parents make similar choices in that they are both likely to choose more affluent schools with better academic records than the schools they are zoned to attend. However, these choices operate in different spheres, as advantaged parents choose the most affluent schools with the best academic records, and disadvantaged parents choose away from the least affluent schools with the worst academic records to schools that are slightly better. 相似文献
993.
Blending high-quality and rigorous research with pure evaluation practice can often be best accomplished through thoughtful collaboration. The evaluation of a high school drug prevention program (All Stars Senior) is an example of how perceived competing purposes and methodologies can coexist to investigate formative and summative outcome variables that can be used for program improvement. Throughout this project there were many examples of client learning from evaluator and evaluator learning from client. This article presents convincing evidence that collaborative evaluation can improve the design, implementation, and findings of the randomized control trial. Throughout this paper, we discuss many examples of good science, good evaluation, and other practical benefits of practicing collaborative evaluation. Ultimately, the authors created the term pre-formative evaluation to describe the period prior to data collection and before program implementation, when collaborative evaluation can inform program improvement. 相似文献
994.
We propose a procedure for dividing a set of indivisible items between two players. We assume that each player’s preference over subsets of items is consistent with a strict ranking of the items, and that neither player has information about the other’s preferences. Our procedure ensures an envy-free division—each player receives a subset of items that it values more than the other player’s complementary subset—given that an envy-free division of “contested items,” which the players would choose at the same time, is possible. We show that the possibility of one player’s undercutting the other’s proposal, and implementing the reduced subset for himself or herself, makes the proposer “reasonable,” and generally leads to an envy-free division, even when the players rank items exactly the same. Although the undercut procedure is manipulable and its envy-free allocation may be Pareto-inferior, each player’s maximin strategy is to be truthful. Applications of the procedure are discussed briefly. 相似文献
995.
Devine CM Maley M Farrell TJ Warren B Sadigov S Carroll J 《Evaluation and program planning》2012,35(1):88-96
Small Steps are Easier Together (SS) was a pilot environmental intervention in small rural worksites in Upstate New York in collaboration with Extension educators. Worksite leaders teamed with co-workers to select and implement environmental changes to increase walking steps over individual baseline and to choose healthy eating options over 10 weeks. Participants were 226 primarily white, women employees in 5 sites. A mixed methods process evaluation, conducted to identify determinants of intervention effectiveness and to explain differences in outcomes across worksites, included surveys, self-reports of walking and eating, interviews, focus groups, and an intervention log. The evaluation assessed reach, characteristics of recruited participants, dose delivered, dose received, and context and compared sites on walking and eating outcomes. Emergent elements of participant-reported dose received included: active leadership, visible environmental changes, critical mass of participants, public display of accomplishments, accountability to co-workers, and group decision making. Participants at sites with high reach and dose were significantly more likely than sites with low reach and dose to achieve intervention goals. Although this small pilot needs replication, these findings describe how these evaluation methods can be applied and analyzed in an environmental intervention and provide information on trends in the data. 相似文献
996.
Using geo-referenced data from the Panel Study of Income Dynamics, in conjunction with decennial census data, this research examines metropolitan-area variation in the ability of residentially mobile blacks, Hispanics, and whites to convert their income into two types of neighborhood outcomes-neighborhood racial composition and neighborhood socioeconomic status. For destination tract racial composition, we find strong and near-universal support for the "weak version" of place stratification theory; relative to whites, the effect of individual income on the percent of the destination tract population that is non-Hispanic white is stronger for blacks and Hispanics, but even the highest earning minority group members move to tracts that are "less white" than the tracts that the highest-earning whites move to. In contrast, for moves into neighborhoods characterized by higher levels of average family income, we find substantial heterogeneity across metropolitan areas in minorities' capacity to convert income into neighborhood quality. A slight majority of metropolitan areas evince support for the "strong version" of place stratification theory, in which blacks and Hispanics are less able than whites to convert income into neighborhood socioeconomic status. However, a nontrivial number of metropolitan areas also evince support for spatial assimilation theory, where the highest-earning minorities achieve neighborhood parity with the highest-earning whites. Several metropolitan-area characteristics, including residential segregation, racial and ethnic composition, immigrant population size, poverty rates, and municipal fragmentation, emerge as significant predictors of minority-white differences in neighborhood attainment. 相似文献
997.
Eye-tracking was used to investigate whether gaze direction would influence the visual scanning of faces, when presented in
the context of a full character, in different social settings, and with different task demands. Participants viewed individual
computer agents against either a blank background or a bar scene setting, during both a free-viewing task and an attractiveness
rating task for each character. Faces with a direct gaze were viewed longer than faces with an averted gaze regardless of
body context, social settings, and task demands. Additionally, participants evaluated characters with a direct gaze as more
attractive than characters with an averted gaze. These results, obtained with pictures of computer agents rather than real
people, suggest that direct gaze is a powerful attention grabbing stimulus that is robust to background context or task demands. 相似文献
998.
This review of controlled studies of marital and family therapy (MFT) in alcoholism treatment updates the earlier review by O'Farrell and Fals-Stewart (2003). We conclude that, when the alcoholic is unwilling to seek help, MFT is effective in helping the family cope better and motivating alcoholics to enter treatment. Specifically, both Al-Anon facilitation and referral and spouse coping skills training (based on new findings) help family members cope better, and CRAFT promotes treatment entry and was successfully transported to a community clinic in a new study. Once the alcoholic enters treatment, MFT, particularly behavioral couples therapy (BCT), is clearly more effective than individual treatment at increasing abstinence and improving relationship functioning. New BCT studies showed efficacy with women alcoholics and with gay and lesbian alcoholics, and BCT was successfully transported to a community clinic, a brief BCT version was tested, and BCT was adapted for family members other than spouses. Future studies should evaluate the following: MFT with couples where both members have a current alcohol problem and with minority patients, mechanisms of change, transportability of evidence-based MFT approaches to clinical practice settings, and replication of MFT outcomes of reduced partner violence and improved child functioning. 相似文献
999.
The overarching aim of this article is to review the research on relationship education programs and approaches that has been published or accepted for publication since the last review article in 2003. This article provides a critical overview of the relationship education field and sets an agenda for research and practice for the next decade. A theme weaved throughout the article is the ways in which relationship education is similar and different from couples therapy, and we conclude that there can be a synergistic, healthy marriage between the two. We then provide recommendations for future directions for research in the relationship education field. Finally, the coauthors comment on our experiences in both the relationship education field and the couples therapy field as both researchers and interventionists. 相似文献
1000.
Jørgen Carling Marta Bivand Erdal Cindy Horst 《The International migration review》2012,46(2):283-309
This article examines how conflict in the country of origin interacts with other factors in shaping migrants’ remittance‐sending practices. Our data come from a survey of 10 immigrant groups in Norway and semi‐structured interviews with Somali and Pakistani remittance‐senders and receivers. First, we conduct an in‐depth comparison to explore the differences in how Somali and Pakistani migrants decide about remittance‐sending. Second, we use survey data on all 10 migrant groups to evaluate whether the differences that are not explained by socioeconomic characteristics, may partly reflect whether or not there is ongoing conflict in the country of origin. In our analyses we differentiate between (1) the effect of migrants’capacity to remit and their prioritizing of local and transnational expenditures, and (2) the impact of state collapse and absence of human security on migrants’ and refugees’desire to remit. We find that ongoing conflict in the country of origin exerts an upward pressure on remittance‐sending. 相似文献