全文获取类型
收费全文 | 18619篇 |
免费 | 489篇 |
专业分类
管理学 | 2187篇 |
民族学 | 102篇 |
人才学 | 7篇 |
人口学 | 1788篇 |
丛书文集 | 107篇 |
教育普及 | 2篇 |
理论方法论 | 1719篇 |
现状及发展 | 1篇 |
综合类 | 236篇 |
社会学 | 9374篇 |
统计学 | 3585篇 |
出版年
2023年 | 97篇 |
2022年 | 80篇 |
2021年 | 95篇 |
2020年 | 288篇 |
2019年 | 469篇 |
2018年 | 473篇 |
2017年 | 660篇 |
2016年 | 464篇 |
2015年 | 355篇 |
2014年 | 443篇 |
2013年 | 3171篇 |
2012年 | 660篇 |
2011年 | 595篇 |
2010年 | 458篇 |
2009年 | 442篇 |
2008年 | 509篇 |
2007年 | 505篇 |
2006年 | 469篇 |
2005年 | 425篇 |
2004年 | 417篇 |
2003年 | 389篇 |
2002年 | 392篇 |
2001年 | 466篇 |
2000年 | 386篇 |
1999年 | 380篇 |
1998年 | 311篇 |
1997年 | 287篇 |
1996年 | 292篇 |
1995年 | 277篇 |
1994年 | 262篇 |
1993年 | 252篇 |
1992年 | 292篇 |
1991年 | 289篇 |
1990年 | 260篇 |
1989年 | 258篇 |
1988年 | 243篇 |
1987年 | 226篇 |
1986年 | 218篇 |
1985年 | 247篇 |
1984年 | 236篇 |
1983年 | 233篇 |
1982年 | 177篇 |
1981年 | 155篇 |
1980年 | 171篇 |
1979年 | 169篇 |
1978年 | 141篇 |
1977年 | 140篇 |
1976年 | 123篇 |
1975年 | 115篇 |
1974年 | 96篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
961.
Many studies have documented significant differences in sexual desire between individuals of European and Chinese descent, but few have examined the mechanisms that underlie these differences. A recent study of university students found that sex guilt is one mechanism by which culture influences sexual desire among Chinese and Euro-Canadian women. The goal of this study was to examine whether sex guilt also mediates the relationship between ethnicity and sexual desire in a sample that is more representative of women in the general population. Euro-Canadian (n = 78; mean age = 42.1 years) and Chinese (n = 87; mean age = 42.8 years) women were recruited from the community. Euro-Canadian women reported greater sexual desire and less sex guilt. In the entire sample, sex guilt mediated the relationship between ethnicity and sexual desire such that the Chinese women reported greater sex guilt, which, in turn, was associated with lower sexual desire. Among the Chinese women, sex guilt mediated the relationship between mainstream acculturation (degree of Westernization) and sexual desire such that more Westernized Chinese women reported less sex guilt, which, in turn, was associated with greater sexual desire. These results support recent findings and further suggest that sex guilt may be one mechanism by which ethnicity affects sexual desire. 相似文献
962.
Wing‐Chung Ho offers an extensive critique of what he calls our “radical constructionist approach to family experience,” questioning the theoretical validity and empirical utility of the research program. This article responds to the charges in the broader context of the program's constructionist analytics, discussing family's experiential location, organizational embeddedness, and the importance of ethnographic sensibility. A brief extract of situated talk and interaction is presented to illustrate the discursive complexity and institutional bearings of family as a category of experience. The conclusion takes up the issue of whether the program is radical in conceptualization and empirical realization. 相似文献
963.
Various strategies are used as tools in health promotion campaigns to increase health-related outcomes among target populations. Evaluations of these campaigns examine effects on changing people's knowledge, attitudes, and/or behaviors. Most evaluations examine the combined impact of multiple strategies. Less is known about the unique effects of particular strategies. To address this gap, we used highly systematic methods to identify and review scientifically rigorous evaluations of 18 campaigns that examined the unique effects of three sets of intervention strategies (entertainment education, law enforcement, and mass media) on changes in knowledge, attitudes, and practice with regard to various health behaviors. Results showed differences in evaluation processes based on the type of strategy used to promote campaign messages. For instance, evaluations of mass-media based campaigns were more likely to examine changes in knowledge, relative to evaluations of campaigns that used law enforcement strategies. In addition, campaign effects varied by particular strategies. Mass media-based campaigns were more likely to affect knowledge, relative to behaviors. Law enforcement and entertainment education-based campaigns showed positive effects on behaviors. The implications for planning and evaluating health promotion campaigns are described. 相似文献
964.
This study compares self-reported readiness to engage in college between a sample of 81 college freshmen who aged out of foster care prior to or while attending a large four-year public university and the national freshman population. Results indicate that students from foster care are significantly different from their non-foster-care peers in their readiness to engage in college. The results also show that foster youth are less well prepared academically upon entering college and this performance gap persists through the first semester of college. These findings are examined in the context of the current literature on foster youth. Limitations of the study and implications for future research and practice are discussed. 相似文献
965.
Katherine Cuff Sunghoon Hong Jesse A. Schwartz Quan Wen John A. Weymark 《Social Choice and Welfare》2012,39(2-3):567-597
A necessary and sufficient condition for dominant strategy implementability when preferences are quasilinear is that, for every individual i and every choice of the types of the other individuals, all k-cycles in i’s allocation graph have nonnegative length for every integer k ≥ 2. Saks and Yu (Proceedings of the 6th ACM conference on electronic commerce (EC’05), pp 286–293, 2005) have shown that when the number of outcomes is finite and i’s valuation type space is convex, nonnegativity of the length of all 2-cycles is sufficient for the nonnegativity of the length of all k-cycles. In this article, it is shown that if each individual’s valuation type space is a full-dimensional convex product space and a mild domain regularity condition is satisfied, then (i) the nonnegativity of all 2-cycles implies that all k-cycles have zero length and (ii) all 2-cycles having zero length is necessary and sufficient for dominant strategy implementability. 相似文献
966.
We used data from a randomized controlled study of Oxford House (OH), a self-run, self-supporting recovery home, to conduct a cost-benefit analysis of the program. Following substance abuse treatment, individuals that were assigned to an OH condition (n = 68) were compared to individuals assigned to a usual care condition (n = 61). Economic cost measures were derived from length of stay at an Oxford House residence, and derived from self-reported measures of inpatient and outpatient treatment utilization. Economic benefit measures were derived from self-reported information on monthly income, days participating in illegal activities, binary responses of alcohol and drug use, and incarceration. Results suggest that OH compared quite favorably to usual care: the net benefit of an OH stay was estimated to be roughly $29,000 per person on average. Bootstrapped standard errors suggested that the net benefit was statistically significant. Costs were incrementally higher under OH, but the benefits in terms of reduced illegal activity, incarceration and substance use substantially outweighed the costs. The positive net benefit for Oxford House is primarily driven by a large difference in illegal activity between OH and usual care participants. Using sensitivity analyses, under more conservative assumptions we still arrived at a net benefit favorable to OH of $17,830 per person. 相似文献
967.
The purpose of this study is to describe the types of programs and mental health services former system youth with mental health histories would be inclined to engage in to manage their mental health difficulties, along with the factors that might hinder them from engaging in these services. A series of closed and open-ended questions on potential programs and services were asked, as part of a larger study. Participants were former system youth; specifically 18?C30?year olds who were diagnosed with a mood disorder and were involved with public mental health and social services (e.g., public welfare, child welfare, juvenile justice) during childhood. Responses to the open-ended questions were categorized and percentages are reported from the yes/no items. Eighty-three percent and 76% reported that they would be enticed to come to a support group and panel discussion on mood disorders, respectively, while only 46% reported that they would attend a family support group. Talking with others who have had similar experiences, material possessions and creative expression were the most common responses regarding what would entice them to get involved. Further, peer disrespect, transportation, and daycare were common barriers to potential participation. As the field continues to build knowledge on system-wide strategies to improve agency-based mental health care for transitioning youth and young adults, new evidence-based approaches may benefit from listening to the specific needs, preferences, and suggestions of these youth themselves. 相似文献
968.
MARTHA A. STARR 《Economic inquiry》2012,50(4):1097-1111
This paper investigates the influence of economic news on consumer sentiment, and examines whether “news shocks”—changes in coverage that would not be expected from incoming data on economic fundamentals—have aggregate effects. Using monthly U.S. data and a structural vector autoregression, I find that (1) sentiment is affected by news shocks; (2) after filtering out effects of news shocks, shocks to sentiment still have positive effects on consumer spending; and (3) news shocks influence both spending and unemployment in significant, though transitory ways. These results are consistent with other evidence of a role of nonfundamental factors in aggregate fluctuations. (JEL E21, E32, D12) 相似文献
969.
We measured the use of patronizing speech among young adults who were instructed to provide directions (via an internet connection) to a newcomer to campus described as 21 or 65?years old. As predicted, the acoustic properties used with older adults were moderated by the speakers?? history with older unrelated adults (no comparable effects were found for speakers?? history with grandparents). Participants with relatively low contact with unrelated older adults were more likely than those with high contact to be judged as sounding ??patronizing?? and to display acoustical properties associated with patronization (high vocal intensity, high pitch) with older newcomers. However, participants showed a shared tendency to speak more slowly to older than young adults. Findings inform our understanding of the circumstances under which ageist speech is amplified or attenuated. 相似文献
970.
Intervention research for couples and families managing chronic health problems is in an early developmental stage. We reviewed randomized clinical trials of family interventions for common neurological diseases, cardiovascular diseases, cancer, and diabetes, which is similar to the content of previous reviews discussed later. One overriding theme of these studies is that patients with chronic illnesses and their families face a variety of challenges to which researchers have responded with an array of treatment modalities. Very few of the interventions reviewed, with the exception of treatment for adolescents with diabetes, tested family psychotherapy models. Most interventions were time-limited therapeutic interventions that trained families to improve their communication and problem-solving skills, individual and family coping skills, and medical management. Researchers more clearly described mechanisms of change in intervention studies with cancer and diabetes than with other diseases, and not surprisingly, they found greater empirical support for their interventions. Family interventions show promise to help patients and family members manage chronic illnesses. To develop an empirical base for family approaches to managing chronic illnesses, interventions must be based on theories that delineate mechanisms of change in family processes and skills in medical management necessary to maintain patients' and family members' health. 相似文献