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   5537篇
  免费   183篇
管理学   698篇
民族学   26篇
人才学   1篇
人口学   563篇
丛书文集   40篇
教育普及   1篇
理论方法论   663篇
综合类   53篇
社会学   3125篇
统计学   550篇
  2023年   42篇
  2021年   28篇
  2020年   68篇
  2019年   84篇
  2018年   102篇
  2017年   163篇
  2016年   117篇
  2015年   91篇
  2014年   134篇
  2013年   1522篇
  2012年   155篇
  2011年   194篇
  2010年   120篇
  2009年   134篇
  2008年   149篇
  2007年   146篇
  2006年   167篇
  2005年   147篇
  2004年   134篇
  2003年   123篇
  2002年   130篇
  2001年   88篇
  2000年   96篇
  1999年   85篇
  1998年   67篇
  1997年   72篇
  1996年   93篇
  1995年   68篇
  1994年   72篇
  1993年   64篇
  1992年   67篇
  1991年   65篇
  1990年   56篇
  1989年   66篇
  1988年   46篇
  1987年   43篇
  1986年   60篇
  1985年   58篇
  1984年   57篇
  1983年   45篇
  1982年   36篇
  1981年   48篇
  1980年   41篇
  1979年   49篇
  1978年   45篇
  1977年   36篇
  1976年   40篇
  1975年   40篇
  1974年   28篇
  1971年   26篇
排序方式: 共有5720条查询结果,搜索用时 546 毫秒
851.
Abstract

Objective: Students who smoke are more likely to engage in risky behaviors such as binge drinking and unprotected sex (Schnieder and Morris, Environ Behav. 1999; 23:575–591). The goals of the present study were to determine whether smokers assess these behaviors as lower risk than nonsmokers, and if smoking rate influences risk perceptions. Methods: Participants were 303 college students. Cognitive Appraisal of Risky Activities (Fromme et al., Cognit Ther Res. 1997; 21:421–442) and smoking were assessed August–November, 2006. Results: Smokers reported significantly less risk, more benefit, and more involvement in risky behaviors than nonsmokers (p < .01). In hierarchical linear regression, risk perceptions moderated the association between smoking and (a) expected benefit from risky sexual behaviors (β = ?1.121, p < .05); and (b) expected involvement with illicit drugs (β = ?.313, p < .01). Conclusions: College smokers’ assessment of high-risk behaviors influenced their intended involvement. Risk perception change may therefore alter their involvement in high-risk behaviors.  相似文献   
852.
Abstract

Objective: The current study identified gender-specific correlates of hazardous drinker status as defined by the AUDIT. Participants: A total of 462 college student volunteers completed the study in 2006. The sample was predominantly Caucasian (75%) and female (55%). Methods: Participants completed a survey assessing demographics, alcohol use patterns, and health indices. Scores of 8 or more on the AUDIT defined the at-risk subsample. Logistic regression models determined which variables predicted AUDIT risk status for men and women. Results: The at-risk participants reported higher alcohol use and related problems, elevated sleep problems and lower health ratings. High typical blood alcohol concentration (BAC), lifetime drug use, and psychosocial problems predicted risk status for males. Binge frequency and psychosocial problems predicted risk status for females. Conclusions: Different behavioral profiles emerged for men and women identified as hazardous drinkers on the AUDIT. The efficacy of brief alcohol interventions could be enhanced by addressing these behavioral correlates.  相似文献   
853.
Abstract

The authors surveyed 738 college students aged 18 to 27 years to assess overweight, obesity, dietary habits, and physical activity. They used BMI (body mass index) > 25 kg/m2 or BMI > 85th percentile and BMI > 30 kg/m1 or BMI > 95th percentile to estimate overweight and obesity in those aged < 19 years. To define overweight and obesity in those > 20 years, they used BMI > 25 kg/m2 and > 30 kg/m2. They found overweight rates of 21.6% using BMI directly and 16.2% using BMI percentile and obesity rates of 4.9% using BMI directly and 4.2% using BMI percentile. More than 69% of the participants reported < 5 servings of fruits and vegetables per day and more than 67% reported < 20 g of fiber per day; participants reported physical activity on fewer than 3 d/wk. Most college students are not meeting dietary and physical activity guidelines, suggesting the need for prevention interventions and increased understanding of overweight in college students.  相似文献   
854.
Abstract

Observed seat belt use on a private university campus was compared with use by the general population of the state in which the university is located. It was expected, given the higher educational level and socioeconomic status of the university population, that seat belt use would be higher than it is for the general population. The results of the study indicated that seat belt use by members of the university community was actually significantly lower than that reported statewide. The statistically significant difference was even greater for front-seat passengers than for drivers on campus.  相似文献   
855.
Abstract

The authors surveyed 614 African American university students to determine the magnitude of cigarette use, identify risk factors, and develop models to predict smoking. More than half (58.3%) of the participants had smoked at least once, and 9.3% of that group were lifetime smokers. Among the lifetime smokers, 71.3% had smoked during the 30 days preceding the survey. More women (66.8%) than men (56.1%) had tried smoking and were classed as lifetime smokers. Residence, parental, and peer smoking (current and childhood) were associated with trying smoking; age, race/ethnicity, and marital status were additional factors for becoming a lifetime smoker. The risk of being a lifetime smoker was reduced when neither friends nor parents of the student smoked and the student viewed spirituality as important. The results of this study add to the growing understanding of health risk behaviors among African Americans and can be useful in reducing smoking.  相似文献   
856.
Abstract

Biological, behavioral, and psychosocial contributions to the gender gap in coronary heart disease (CHD) are discussed. Although CHD is the Number 1 cause of death for both sexes in the industrialized world, CHD mortality rates between these countries are larger than those between men and women, suggesting that biological factors are not the sole influences on the gender gap in CHD. Traditional coronary risk factors cannot explain the rapid increase in CHD mortality among middle-aged men in many of the newly independent states of eastern Europe. However, eastern European men score higher on stress-related psychosocial coronary risk factors (eg, social isolation, vital exhaustion) than men living in the West. Comparisons between the sexes also reveal gender differences in psychosocial and behavioral coronary risk factors, including excessive alcohol consumption and smoking, favoring women. Overall, it appears that men's coping with stressful events may be less adaptive physiologically, behaviorally, and emotionally, contributing to their increased risk for CHD.  相似文献   
857.
Abstract

Objective: To report on college student opinions about the scope of college sexual misconduct (CSM), suggested university sanctions, and treatment of students found responsible of CSM.

Participants: In all, 23?US undergraduate students (14 females and 9 males) with a mean age of 20 years.

Methods: Students participated either in female, male, or mixed-sex focus groups that facilitated the discussion of factors related to CSM.

Results: Students provided in-depth feedback on the climate on US college campuses and factors related to CSM. They agreed upon CSM risk factors and context characteristics, but raised different male and female issues across sex groups. They further provided resolute suggestions for the solution of CSM, experienced treatment barriers, and limited victim reporting.

Conclusion: Student focus groups provide important information about the scope of CSM and offer valuable suggestions for the solution of the problem that may be crucial for the development of successful sexual assault interventions.  相似文献   
858.
Abstract

Objective: Alcohol has been linked to a variety of risky sexual practices, including inconsistent condom use. Due to the high rates of alcohol consumption among underage college women, greater understanding of the role of alcohol in young women's sexual decision making is warranted. Participants and Methods: Female underage (18- to 20-year-old) social drinkers (N = 94) participated in an experiment in which they projected themselves into a written hypothetical sexual situation with a new partner. One half of the situations portrayed alcohol consumption; one half did not involve alcohol consumption. Their appraisals of the situation's sexual potential, impelling and inhibiting cognitions, and sexual behavior intentions were assessed. Results: Results revealed that alcohol's expectancy effects on young women's unprotected sexual intentions were mediated by their cognitive appraisals of the situation. Conclusions: These findings indicate that alcohol expectancies and their influence on women's sexual decisions should be incorporated into sexual risk reduction efforts.  相似文献   
859.
860.
ABSTRACT

Self-neglect among older adults results in increased morbidity and mortality rates. Depression is strongly linked to self-neglect and when untreated, severely complicates management of health and functional outcomes. The study aims to identify factors correlated with depression to inform approaches to service recruitment and retention that improve long-term outcomes. The sample included urban community-dwelling older adults (n = 96) 65 years of age and older with Adult Protective Services-substantiated self-neglect. All participants completed a range of validated cognitive, functional, and self-report demographic and clinical measures around health and mental health functioning. A secondary data analysis using multivariable logistic regression revealed that a positive screen for alcohol abuse, low self-rated health, and higher self-reported pain were associated with significantly higher odds of self-reported depression. Further research is needed to understand the temporality between these correlates and depression and to inform prevention and intervention practices for self-neglecting older adults.  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