全文获取类型
收费全文 | 13575篇 |
免费 | 226篇 |
专业分类
管理学 | 1760篇 |
民族学 | 52篇 |
人才学 | 3篇 |
人口学 | 1166篇 |
丛书文集 | 83篇 |
教育普及 | 2篇 |
理论方法论 | 1265篇 |
综合类 | 349篇 |
社会学 | 6807篇 |
统计学 | 2314篇 |
出版年
2021年 | 74篇 |
2020年 | 206篇 |
2019年 | 234篇 |
2018年 | 260篇 |
2017年 | 390篇 |
2016年 | 307篇 |
2015年 | 241篇 |
2014年 | 271篇 |
2013年 | 2194篇 |
2012年 | 423篇 |
2011年 | 347篇 |
2010年 | 233篇 |
2009年 | 262篇 |
2008年 | 293篇 |
2007年 | 306篇 |
2006年 | 252篇 |
2005年 | 372篇 |
2004年 | 328篇 |
2003年 | 280篇 |
2002年 | 287篇 |
2001年 | 331篇 |
2000年 | 316篇 |
1999年 | 330篇 |
1998年 | 229篇 |
1997年 | 211篇 |
1996年 | 226篇 |
1995年 | 196篇 |
1994年 | 215篇 |
1993年 | 185篇 |
1992年 | 246篇 |
1991年 | 239篇 |
1990年 | 220篇 |
1989年 | 223篇 |
1988年 | 202篇 |
1987年 | 194篇 |
1986年 | 193篇 |
1985年 | 187篇 |
1984年 | 211篇 |
1983年 | 206篇 |
1982年 | 172篇 |
1981年 | 149篇 |
1980年 | 147篇 |
1979年 | 176篇 |
1978年 | 140篇 |
1977年 | 121篇 |
1976年 | 108篇 |
1975年 | 107篇 |
1974年 | 96篇 |
1973年 | 98篇 |
1972年 | 69篇 |
排序方式: 共有10000条查询结果,搜索用时 17 毫秒
991.
Thirty-five caregivers of related children who were in the custody of the child welfare system were interviewed individually or in focus groups as the state child welfare system implemented new federal and state policies encouraging these caregivers to adopt or assume guardianship of the children in their care. Interviews were transcribed and analyzed using qualitative methods. Issues of concern included emergency entrance into caregiving; the simultaneous satisfaction and burden of caregiving; obstacles to caregiving, adoption, or guardianship; complex changes in family dynamics following placement of children; sources of support; and caution regarding adoption or guardianship. The caregivers also offered recommendations for the child welfare system. Policy, practice, and research implications are discussed. 相似文献
992.
Neighborhood disadvantage, stress, and drug use among adults 总被引:1,自引:0,他引:1
Boardman JD Finch BK Ellison CG Williams DR Jackson JS 《Journal of health and social behavior》2001,42(2):151-165
This paper explores the relationships among neighborhood disadvantage, stress, and the likelihood of drug use in a sample of adults (N = 1,101). Using the 1995 Detroit Area Study in conjunction with tract-level data from the 1990 census, we find a positive relationship between neighborhood disadvantage and drug use, and this relationship remains statistically significant net of controls for individual-level socioeconomic status. Neighborhood disadvantage is moderately associated with drug related behaviors, indirectly through increased social stressors and higher levels of psychological distress among residents of disadvantaged neighborhoods. A residual effect of neighborhood disadvantage remains, net of a large number of socially relevant controls. Finally, results from interactive models suggest that the relationship between neighborhood disadvantage and drug use is most pronounced among individuals with lower incomes. 相似文献
993.
The impact of childhood abuse and neglect on adult mental health: a prospective study 总被引:10,自引:0,他引:10
This paper examines the impact of three types of victimization in childhood--sexual abuse, physical abuse, and neglect--on lifetime measures of mental health among adults. In contrast to research that relies on retrospective recall of childhood victimization, this work uses a prospective sample gathered from records of documented court cases of childhood abuse and neglect in a midwestern city around 1970. These subjects were interviewed about twenty years later. In addition, this research compares outcomes of the 641 members of the abuse and neglect group with a matched control group of 510 persons who did not have documented cases of abuse or neglect. The results indicate that men who were abused and neglected as children have more dysthymia and antisocial personality disorder as adults than matched controls, but they did not have more alcohol problems. Abused and neglected women report more symptoms of dysthymia, antisocial personality disorder, and alcohol problems than controls. After controlling for stressful life events, however, childhood victimization had little direct impact on any lifetime mental health outcome. This research indicates the importance of adopting an approach that places childhood victimization in the context of other life stressors and of prospective changes over the life course. 相似文献
994.
995.
This was a preliminary study to evaluate the effectiveness of a tobacco prevention program on knowledge, attitude, intention, and behavior of tobacco use among fourth-grade students in four north central Florida counties. The results suggest that the program was effective in improving students' knowledge, attitudes, and intention toward not using tobacco products. Data analysis showed that students in the education group had a greater improvement in knowledge than the comparison group. Students in the education group also improved their attitude and intention scores while the comparison group did not show any improvement. The results also indicated positive responses from the students. In addition, teachers also gave a very positive response to the program. 相似文献
996.
997.
Phelps RP 《Evaluation review》2001,25(4):391-439
This article describes the education quality control systems (for mathematics) used by those countries that performed best on the Third International Mathematics and Science Study (TIMSS). Enforced quality control measures are defined as "decision points"--where adherence to the curriculum and instruction system can be reinforced. Most decision points involve stakes for the student, teacher, or school. They involve potential consequences for failure to adhere to the system and to follow the program at a reasonable pace. Generally, countries with more decision points perform better on the TIMSS. When the number of decision points and TIMSS test scores are adjusted for country wealth, the relationship between the degree of (enforced) quality control and student achievement appears to be positive and exponential. CONCLUSION: The more (enforced) quality control measures employed in an education system, the greater is students' academic achievement. 相似文献
998.
Provision of home- and community-based long-term care is a growing concern at the national, state, and local levels. As more persons grow old, the need for these services is expected to rise. This analysis examines the distribution and utilization of three home- and community-based long-term care programs in North Carolina for each of the state's 100 counties. Maps were generated to examine how counties differed in respect to service utilization among the elderly. Great variability was found in number of elderly utilizing the services across the state as well as the percent of Medicaid- and/or age-eligible persons who utilized the programs. Multivariate modeling for associations to service utilization was only possible for one of the long-term care programs. Results indicated that living alone, being non-white, and having a mobility and self-care limitation were all positively related to utilization. Percent of persons 85 years or older and the ratio of institutionalized long-term care beds were negatively associated with utilization. It was concluded that states must engage in concerted efforts to ensure equity in access to home- and community-based long-term care. 相似文献
999.
This prospective study examines the epidemiology of physical attack and rape among a sample of 171 not-in-treatment, crack-cocaine using women. Since initiating crack use, 62% of the women reported suffering a physical attack. The annual rate of victimization by physical attack was 45%. Overall, more than half of the victims sought medical care subsequent to an attack. The prevalence of rape since crack use was initiated was 32%, and the annual rate was 11%. Among those women having been raped since they initiated crack use, 83% reported they were high on crack when the crime occurred as were an estimated 57% of the perpetrators. Logistic regression analyses showed that duration of crack use, arrest for prostitution, and some college education were predictors of having experienced a physical attack. Duration of crack use and a history of prostitution were predictors of suffering a rape. Drug abuse treatment programs must be sensitive to high levels of violence victimization experienced by crack-cocaine using women. Screening women for victimization, and treating the problems that emanate from it, may help make drug abuse treatment more effective. 相似文献
1000.