全文获取类型
收费全文 | 13967篇 |
免费 | 233篇 |
专业分类
管理学 | 1888篇 |
民族学 | 63篇 |
人才学 | 1篇 |
人口学 | 1178篇 |
丛书文集 | 83篇 |
教育普及 | 2篇 |
理论方法论 | 1316篇 |
综合类 | 342篇 |
社会学 | 6883篇 |
统计学 | 2444篇 |
出版年
2021年 | 74篇 |
2020年 | 200篇 |
2019年 | 254篇 |
2018年 | 281篇 |
2017年 | 394篇 |
2016年 | 304篇 |
2015年 | 254篇 |
2014年 | 281篇 |
2013年 | 2305篇 |
2012年 | 430篇 |
2011年 | 359篇 |
2010年 | 243篇 |
2009年 | 264篇 |
2008年 | 293篇 |
2007年 | 308篇 |
2006年 | 241篇 |
2005年 | 383篇 |
2004年 | 324篇 |
2003年 | 274篇 |
2002年 | 306篇 |
2001年 | 337篇 |
2000年 | 319篇 |
1999年 | 337篇 |
1998年 | 228篇 |
1997年 | 226篇 |
1996年 | 232篇 |
1995年 | 199篇 |
1994年 | 213篇 |
1993年 | 194篇 |
1992年 | 249篇 |
1991年 | 246篇 |
1990年 | 223篇 |
1989年 | 231篇 |
1988年 | 206篇 |
1987年 | 202篇 |
1986年 | 200篇 |
1985年 | 193篇 |
1984年 | 224篇 |
1983年 | 215篇 |
1982年 | 178篇 |
1981年 | 155篇 |
1980年 | 143篇 |
1979年 | 174篇 |
1978年 | 147篇 |
1977年 | 126篇 |
1976年 | 116篇 |
1975年 | 112篇 |
1974年 | 103篇 |
1973年 | 98篇 |
1971年 | 72篇 |
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
981.
Evidence suggests that African American youths initiate sexual activity at earlier ages than do European American or Latino youths. Using data from a multilevel study in Chicago, we developed and tested a neighborhood-based model of the timing of first adolescent intercourse that emphasizes the impact of neighborhood structural disadvantage and collective efficacy on early sexual activity (at ages 11 to 16). In turn, we explored the extent to which neighborhood factors account for racial differences in the timing of first intercourse. The findings indicate that demographic background, family processes, peer influences, and developmental risk factors account for about 30% of the baseline increased likelihood of early sexual onset for African American youths compared with European American youths. However, a significant residual racial difference remained even after we considered a host of micro-level factors. Neighborhood-level concentrated poverty largely explained this residual racial difference. Collective efficacy also independently contributed to the delay of sexual onset. No significant baseline difference in age of sexual initiation was found between Latino and European American youths. 相似文献
982.
Support provided by family and friends may influence the extent to which older women who are primary caregivers for a spouse with dementia adhere to an exercise routine. The current study reports on qualitative interviews with 30 older female caregivers taking part in an exercise intervention regarding the support they received for their exercise goals. Results indicate that nearly all women received some level of verbal encouragement from family and friends, though far fewer had exercise partners or someone to stay with their husbands while they exercised. To reflect the wide variation observed in the amount of exercise support received and needed by caregivers, a typology of support situations was constructed as follows: Self-reliant, Well-supported, Under-supported, and Superfluous support. Implications for future exercise interventions targeting this population are discussed. 相似文献
983.
How do family arrangements affect subjective well-being? We investigate this issue using data pooled from the IsssA and HILDA, both large, representative national samples of Australia (pooled n=38 447). Our regression analysis of cross-sectional and panel data examines how large are the differences in life satisfaction according to marital status and cohabitation. We find that women and men in formal marriages experience higher levels of life satisfaction than do people in other family arrangements. Moreover, both multiple tests in the cross-section, and tests controlling for prior happiness in the panel analysis, suggest that this is a causal relationship. Aggregating up the levels of life satisfaction generated by different marriage and cohabitation arrangements across a lifetime, suggests that a life-long marriage is the most satisfying. Early divorce followed by an enduring second marriage is little worse (because little time is spent outside the married state). But divorce without remarriage, or long lasting cohabitation without formal marriage, reduce the lifetime sum of subjective well-being by 4–12% for both women and men. 相似文献
984.
Gove WR 《Journal of health and social behavior》2004,45(4):357-375
This paper provides a new way of conceptualizing the career of the mentally ill. Most persons who experience an episode of a serious mental disturbance lead a normal life, while a few persons lead lifetimes that revolve around their mental disorders. The processes leading to either result can only be understood by integrating the traditional labeling and psychiatric perspectives with lay understandings of the concepts of "mental illness" and "nervous breakdowns." A selection of key concepts from these perspectives leads to a better understanding of the different paths persons take as they move through the pre-patient, inpatient, and post-patient phases of the "career of the mentally ill." This perspective makes understandable a number of counterintuitive relationships. For example, it explains why most hospitalized mental patients (1) have a negative stereotype of the "mentally ill," (2) do not perceive themselves as "mentally ill, yet (3) perceive themselves as benefiting from treatment, and (4) do not progress into a career of secondary deviance. 相似文献
985.
Siefert K Heflin CM Corcoran ME Williams DR 《Journal of health and social behavior》2004,45(2):171-186
Food insufficiency is a significant problem in the United States, and poor African American women with children are at especially high risk. An inadequate household food supply can potentially affect the well-being of household members, but it is difficult to distinguish the effects of food insufficiency from risk factors for poor health that are also common among the food insufficient, such as poverty. We examined food insufficiency and physical and mental health among African American and white women (n = 676) who were welfare recipients in 1997. Controlling for common risk factors, women who reported food insufficiency in both 1997 and 1998 were more likely to report fair or poor health at the later date. Food insufficiency in 1998 was significantly associated with meeting the diagnostic screening criteria for recent major depression. Food insufficiency at both times and in 1998 only was related to women's sense of mastery. These findings add to growing evidence that household food insufficiency is associated with poor physical and mental health. 相似文献
986.
Anecdotal reports have suggested that the use and abuse of methamphetamine is increasing in the United States. To date, however, few scholarly works have explored the prevalence and correlates of methamphetamine use in the United States. To address this limitation, a secondary analysis was undertaken with data collected through the Arrestee Drug Abuse Monitoring (ADAM) Program. An examination of methamphetamine-positive rates among ADAM arrestees interviewed between 1991 and 2001 identified that its use is concentrated within the Western part of the United States. Supplementary analyses of Sacramento arrestees indicated that 71% were diagnosed as needing some form of alcohol or other drug treatment. Compared to those arrestees who were detected methamphetamine-negative, methamphetamine-positive arrestees in Sacramento were three times as likely to be white and to have been diagnosed in need of drug treatment. Implications for drug control policy are discussed. 相似文献
987.
This study explored the association between attendance at the "Bud World Party," a family entertainment venue created by Anheuser-Busch for the 2002 Winter Olympics, and alcohol-related beliefs and current drinking behaviors for a group of 7th and 8th graders who attend a middle school in close proximity to the downtown Salt Lake City plaza where the exhibit and related events were located. Data were collected via a questionnaire administered to 283 students 30 days after the closing ceremonies.. Logistic regression was used to predict recent alcohol consumption. Significant predictors were race (non-white) (OR = 3.9), religiosity (OR = .72), having a parent who drinks (OR = 4.8), the number of best friends who drink (OR = 2.5), and the interaction for "Bud World Party" attendance and gender (OR = 33.2). Post-hoc analysis of the interaction effect indicated that the relationship between "Bud World Party" attendance and recent alcohol consumption is moderated by gender. Girls who visited "Bud World Party" were more likely than the boys to have consumed alcohol in the past 30 days. In addition, the girls who visited "Bud World Party" were more likely to believe that drinking would increase their chances of popularity at school than the students who did not. 相似文献
988.
This research is based on in-depth ethnographic interviews and focus groups with 88 African American family caregivers from various regions of the United States during a stressful time in their family development--caregiving at the end-of-life--and the grieving during the aftermath. The study employed a stratified purposeful sampling strategy. Subjects were African Americans from the Northern, Southern, and Midwestern United States. Formal care is complicated by the distrust that many African Americans hold toward the health care system, which has resulted from years of exclusion, racism and discrimination. The findings highlight the importance of hearing from African American families to gain an understanding of what services, including family therapy and other psychotherapy, they will need during this process. 相似文献
989.
Geffken GR Storch EA Gelfand KM Adkins JW Goodman WK 《Journal of psychosocial nursing and mental health services》2004,42(12):44-51
Obsessive-compulsive disorder (OCD) is a chronic, impairing condition with an estimated lifetime prevalence in adults of 2.5%. Controlled treatment trials have demonstrated that cognitive-behavioral therapy (CBT) is an effective intervention for OCD. However, many individuals diagnosed with OCD do not receive appropriate, empirically validated interventions, perhaps due to limited knowledge of CBT among mental health practitioners. This article provides a review of CBT for OCD. Issues related to treatment delivery and assessment are presented and highlighted by an individual example. 相似文献
990.
Frankenberger KA Frankenberger WR Peden BF Hunt HL Raschick CM Steller EG Peterson JA 《Journal of American college health : J of ACH》2004,53(1):35-40
The authors examined the impact of pharmaceutical companies' advertisements on college students' perceptions of depression and concomitant treatment with antidepressants among 13 male and 31 female undergraduates from a midwestern university. The students were randomly assigned to groups that read either pharmaceutical company advertisements or scientific information about depression and its treatment. The analysis revealed that 40% of the women in the advertisement condition as opposed to 1 woman (6%) in the scientific condition rated themselves as having mild, moderate, or severe depression on the Beck Depression Inventory, second edition. Women in the advertisement condition were significantly more likely to believe that depression required treatment with antidepressant medication and were more willing than women in the scientific condition to suggest antidepressant treatment to others. 相似文献