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   3385篇
  免费   277篇
  国内免费   173篇
  3835篇
  2024年   23篇
  2023年   104篇
  2022年   70篇
  2021年   100篇
  2020年   242篇
  2019年   247篇
  2018年   223篇
  2017年   266篇
  2016年   254篇
  2015年   170篇
  2014年   192篇
  2013年   821篇
  2012年   56篇
  2011年   63篇
  2010年   67篇
  2009年   81篇
  2008年   106篇
  2007年   106篇
  2006年   111篇
  2005年   80篇
  2004年   57篇
  2003年   73篇
  2002年   71篇
  2001年   48篇
  2000年   44篇
  1999年   22篇
  1998年   16篇
  1997年   21篇
  1996年   9篇
  1995年   26篇
  1994年   18篇
  1993年   3篇
  1992年   7篇
  1991年   1篇
  1990年   1篇
  1989年   3篇
  1988年   1篇
  1987年   4篇
  1985年   4篇
  1984年   1篇
  1983年   2篇
  1982年   1篇
  1980年   5篇
  1979年   3篇
  1978年   1篇
  1977年   3篇
  1976年   6篇
  1975年   2篇
排序方式: 共有3835条查询结果,搜索用时 9 毫秒
971.
Agents seeking an opportunity for profit often have to compete with others who pursue the same opportunity. When having to choose between a number of opportunities differing in their value and if individuals differ in their chances of outperforming others, the choice can be cognitively and emotionally demanding. We explore choice between opportunities using stylized Lions–Foxes games. In such a game, each of three players, with different odds of beating others, has to choose one of two contests that offer different rewards. After game theoretically analyzing the games, which we have experimentally employed, we report four experiments that vary in choice elicitation (repeated play or strategy method), in players' matching (random strangers or partners) and in rewards. Regarding contest choices, we found the choice of the higher value (and seemingly more prestigious) contest to be positively related to winning odds, contrary to what four out of the five (mixed, partially mixed, or pure) equilibria predict. Participants started out rather optimistic, with a large majority choosing the higher value option, but with experience, they approached the only viable of two pure strategy equilibria. Still, mixing continued via reacting to past play and outcome, apparently balancing dissatisfaction from choosing either contest.  相似文献   
972.
We examined if boredom is associated with risk-taking. Although this association has frequently been postulated, it has rarely been tested, and the evidence has thus far been rather indirect and speculative. We conducted three studies to test this association more systematically. In Study 1, people high in boredom proneness reported greater risk-taking across financial, ethical, recreational, and health or safety domains. In Study 2, over a series of risky decisions, risk-taking increased in tandem with state boredom. Consistently, in Study 3, people who felt more bored were more likely to choose risky gambles. Furthermore, while dispositional self-control predicted lower risk-taking, state boredom nullified this association, suggesting that elevated risk-taking might be attributed the erosion of self-control under boredom. Our findings establish via direct empirical tests that boredom is associated with making riskier decisions.  相似文献   
973.
为考察不良生活经历对大学生冷酷无情特质的影响机制,采用问卷法调查了湖南省4所学校1872名大学生。结果发现:(1)心理弹性在不良生活经历与大学生冷酷无情特质之间具有部分中介效应,不良生活经历既对冷酷无情特质产生直接影响,也能通过心理弹性对冷酷无情特质产生间接影响;(2)社会支持利用度对心理弹性的中介作用具有调节效应,它调节了中介过程的前半路径和后半路径。因此,不良生活经历对大学生冷酷无情特质的影响具有调节的中介效应。  相似文献   
974.
Background/ObjectiveAssessments of health can be biased by response shift effects. One method for detecting such effects is the use of anchoring vignettes. The aim of this study was to analyze the relationship between participants’ self-assessed health state and their assessments of these vignettes.MethodA total of 342 cardiovascular patients assessed their own state of health on a 0-100 visual analogue scale. The patients additionally assessed two vignettes featuring fictional persons suffering from specific complaints. A sample of the general population (N = 1,236) served as controls.ResultsThe participants rated the health state of the vignette character featuring physical problems as being significantly better than the general population did (effect size: d = 0.53). The group difference in the assessment of the vignette featuring primarily mental health problems was lower (d = -0.17). Participants’ assessments of the vignettes were positively correlated with their assessments of their own health state (r = .26 and r = .10) and with several quality of life variables.ConclusionsAnchoring vignettes are a useful tool for detecting response shift effects.  相似文献   
975.
976.
The aim of this study was to investigate relations between sense of community, life satisfaction, self-esteem, perceived social support and satisfaction with community services in three territorial communities of different sizes. Further, the relations between sense of community and socio-demographic variables (gender, age, marital status, education, children, working in one's own community, owning one's home and group participation) were also studied. The Italian version of the Sense of Community Scale, Rosenberg's Self-esteem Scale, the Satisfaction with Life Scale, the Multidimensional Scale of Perceived Social Support, a scale on Satisfaction with Community Services and a questionnaire were administered to 336 subjects; selection was made in the three communities from 20–60 year-old individuals. Results confirm that sense of community and life satisfaction are higher in the town than in the larger communities; also, sense of community relates to life satisfaction only in the town and the small city. © 1998 John Wiley & Sons, Ltd.  相似文献   
977.
Relationships between perceived life satisfaction and sexual risk-taking behaviors were examined in a statewide sample of public high school students (n = 4,758) using the self-report CDC Youth Risk Behavior Survey (YRBS). Adjusted polychotomous logistic regression analyses and multivariate models (via SUDAAN) constructed separately, revealed a significant race by gender interaction for each race-gender group. Age of first intercourse (13), two or more lifetime sexual intercourse partners, alcohol/drug use before last intercourse, no use of contraception at last intercourse, being forced to have sex, forcing someone to have sex, and having beaten up a date in the last 12 months and having been beaten up by a date (in last 12 months) were associated (p = .05) with reduced life satisfaction. Measures of life satisfaction as a component of comprehensive assessments of adolescent sexual risk-taking behaviors in fieldwork, research, and program-evaluation efforts should be considered.  相似文献   
978.
While many have suggested that to withdraw medical interventions is ethically equivalent to withholding them, the moral complexity of actually withdrawing life supportive interventions from a patient cannot be ignored. Utilizing interplay between expository and narrative styles, and drawing upon our experiences with patients, families, nurses, and physicians when life supports have been withdrawn, we explore the changeable character of boundaries in end-of-life situations. We consider ways in which boundaries imply differences – for example, between cognition and performance – and how the encounter with boundaries can generate altered meanings important for understanding decisions and actions in these contexts. We conclude that the reliance on mere roles to support the moral weight of withdrawing medical interventions is inadequate. Roles that lead us to such moments are exceeded by the responsibility encountered in such moments. And here, we suggest, is the momentous character of withdrawal: it presents the grave astonishment, the trembling awe, in the not-being-there of the other in death.  相似文献   
979.
Adler  Marina A. 《Sex roles》2002,47(1-2):83-98
In order to explore the effects of German unification on the life course of East German women of three age cohorts, 36 biographical interviews were conducted. The purpose of the research was to examine whether unification meant a complete break with the German Democratic Republic's (GDR) standard biography in terms of a voluntary acceptance of West German patterns, or a modification of old patterns based on necessity. Results demonstrate that the historical moment of 1989/90 (the Wende or turning point) has changed the life plans of the three cohorts of women in East Germany in different ways, depending on its timing in their life course. The life patterns of the youngest cohort differ most significantly from the standard biography of the GDR woman in that family formation is postponed and employment prioritized over family. Rather than being a complete break with tradition and a voluntary adoption of Western norms, this means a modification of the life course, because the desire to combine work and family continues to dominate.  相似文献   
980.
Although much gerontological literature is focused on subjective well-being, quality of life, and life satisfaction, we know little about this concept in old age among sub-cultural groups. This paper presents empirical data on subjective well-being among Chinese seniors (age 55 and over) living in seven cities in Canada. It asks whether and to what extent traditional Chinese culture, a culture in which seniors have been historically valued as wise and contributing members to be respected, is related to their evaluation of whether or not life has improved in old age. Among a random sample of 2272 Chinese seniors, some but not all aspects of traditional Chinese culture were related to their valuation of old age. In particular, involvement in that traditional culture, return visits to the homeland, immigration due to family reunion, and ancestor worship were significant predictors but differentially depending on whether the overall scale or specific domains within that overall scale was the dependent variable. The fact that differential aspects of traditional culture contribute to a positive experience of aging suggests we must be careful in generalizing to traditional culture. Importantly, ethnocentric beliefs regarding Chinese culture were not related to any domain of quality of life.  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