全文获取类型
收费全文 | 2504篇 |
免费 | 186篇 |
国内免费 | 54篇 |
专业分类
2744篇 |
出版年
2024年 | 21篇 |
2023年 | 88篇 |
2022年 | 54篇 |
2021年 | 60篇 |
2020年 | 149篇 |
2019年 | 177篇 |
2018年 | 155篇 |
2017年 | 140篇 |
2016年 | 111篇 |
2015年 | 83篇 |
2014年 | 140篇 |
2013年 | 318篇 |
2012年 | 48篇 |
2011年 | 63篇 |
2010年 | 44篇 |
2009年 | 51篇 |
2008年 | 106篇 |
2007年 | 118篇 |
2006年 | 107篇 |
2005年 | 111篇 |
2004年 | 90篇 |
2003年 | 78篇 |
2002年 | 58篇 |
2001年 | 54篇 |
2000年 | 51篇 |
1999年 | 32篇 |
1998年 | 28篇 |
1997年 | 23篇 |
1996年 | 26篇 |
1995年 | 31篇 |
1994年 | 13篇 |
1993年 | 23篇 |
1992年 | 15篇 |
1991年 | 24篇 |
1990年 | 10篇 |
1989年 | 3篇 |
1988年 | 6篇 |
1986年 | 2篇 |
1985年 | 2篇 |
1984年 | 3篇 |
1982年 | 1篇 |
1981年 | 4篇 |
1980年 | 3篇 |
1977年 | 9篇 |
1976年 | 5篇 |
1975年 | 6篇 |
排序方式: 共有2744条查询结果,搜索用时 15 毫秒
881.
A survey of knowledge, beliefs and attitudes about AIDS was administered simultaneously in San Francisco, New York and London to a total of 399 persons. The aim was to investigate how such knowledge and attitudes may he influenced by social and cultural contexts, as well as by disease epidemiology. Across all samples of the general public (excluding risk group members) in the three cities, general fear of AIDS and anti-gay attitudes were significantly negatively correlated with knowledge about AIDS. In the London sample, general fear of AIDS and anti-gay attitudes were significantly and positively associated with both sexual and general health behavior change. Only sexual behavior change, however, was significantly correlated with general fear of AIDS and anti-gay variables for the New York sample. Neither of these variables was significantly associated with behavior change of any kind in the San Francisco sample. We accounted for these inter-city differences by proposing a four-stage model of public response to an epidemic over time. Our data support the need for specific programs aimed at the general public that take into account sociocultural and AIDS epidemiologic differences across different sociocultural contexts. 相似文献
882.
Objective: As public discourse surrounding obesity highlights the societal costs of obesity and individual’s own responsibility for their weight, being overweight is often framed as immoral. Such ‘moralizing’ messages about being overweight may be a psychological threat for those with high body mass. Attempting to counter-moralise the public discourse (i.e. actively arguing that there is nothing ‘immoral’ about being overweight) may relieve this threat, inducing people, especially those with higher (perceived) weight, to engage in healthier behaviours.Method: Two experiments were performed among Dutch and US participants. (Counter-)moralisation was manipulated. Body mass and weight-related self-perceptions were measured. The dependent variable was healthy vs. unhealthy snack choice.Results: (Counter-)moralisation and (perceived) overweight jointly predicted snack choice: counter-moralising messages induced healthy snacking, but only among those who regarded themselves to have a high body mass.Conclusions: The effects of moralising vs. counter-moralising obesity depended on one’s (perceived) overweight. This suggests that, for people with relatively high weight, the current moralising public discourse on obesity works in counterproductive ways. Campaigns that ‘counter-moralize’ obesity (i.e. that refute moralising messages) are more productive, although they should be tailored to those who see themselves as being overweight. 相似文献
883.
Wendy Lawrence Chas Skinner Cheryl Haslam Sian Robinson Hazel Inskip David Barker 《Psychology & health》2013,28(9):1003-1020
Women of lower educational attainment are more likely to eat unhealthy diets than women of higher educational attainment. To identify influences on the food choices of women with lower educational attainment, 11 focus groups (eight with women of lower, and three with women of higher educational attainment) were held. Using a semi-structured discussion guide, environmental, social, historical and psychological factors known to be associated with food choice were explored. Audio recordings were transcribed verbatim and thematically analysed. Compared to women of higher educational attainment, women of lower educational attainment had less control over their families’ food choices, less support for attempts to eat healthily, fewer opportunities to observe and learn good food-related practices, more negative affect, more perceived environmental constraints and more ambiguous beliefs about the consequences of eating a nutritious diet. These findings provide a starting point for taking forward the design of an intervention to improve the diets of young women. 相似文献
884.
Johanna Stålnacke Aiko Lundequist Birgitta Böhm Hans Forssberg Ann-Charlotte Smedler 《Child neuropsychology》2013,19(5):648-667
Cognitive outcome after preterm birth is heterogeneous, and group level analyses may disguise individual variability in development. Using a person-oriented approach, this study investigated individual cognitive patterns and developmental trajectories from preschool age to late adolescence. As part of a prospective longitudinal study, 118 adolescents born preterm, with a birth weight < 1,500 g, participated in neuropsychological assessments at age 5½ years and at 18 years. At each age, four cognitive indices, two tapping general ability and two tapping executive functions, were formed to reflect each individual’s cognitive profile. Cluster analyses were performed at each age separately, and individual movements between clusters across time were investigated. At both 5½ and 18 years, six distinct, and similar, cognitive patterns were identified. Executive functions were a weakness for some but not all subgroups, and verbal ability was a strength primarily among those whose overall performance fell within the normal range. Overall, cognitive ability at 5½ years was highly predictive of ability at age 18. Those who performed at low levels at 5½ years did not catch up but rather deteriorated in relative performance. Over half of the individuals who performed above the norm at 5½ years improved their relative performance by age 18. Among those performing around the norm at 5½ years, half improved their relative performance over time, whereas the other half faced increased problems, indicating a need for further developmental monitoring. Perinatal factors were not conclusively related to outcome, stressing the need for cognitive follow-up assessment of the preterm-born child before school entry. 相似文献
885.
Jon Turney 《Science as culture》2013,22(1):89-103
We report here on a series of interaction-intensive, interdisciplinary workshops to foster collaboration among those who teach, study, and engage with the public about scientific developments and social change—the New England Workshop on Science and Social Change. We include one line of thinking that fed into the workshops and present an analysis of how they contribute to participants developing their interest and skills in collaboration. Workshop evaluations suggest that people are moved to develop themselves as collaborators when they view an experience or training as transformative. Four R's—respect, risk, revelation, and re-engagement—point to the important conditions for interactions among researchers to be experienced as transformative. Three considerations lie behind the focus on the process side of the workshops, not the specific workshop topics: (1) how best to fill in for readers what they missed out on by not being there; (2) workshops and meetings are a ubiquitous part of the culture of science and technology studies (STS) so it is valuable to examine this aspect of our own culture with a view to promoting positive changes; and (3) in some scientific fields organized multi-person collaborative processes form a highly valorized aspect of the culture of science, so reflection on experiences of participation and collaboration in STS might inform our analyses of fields that emphasize collaboration and group processes. Indeed, the authors' own involvement in the workshops extends our own STS work on actor networks and ‘heterogeneous engineering’, that is, the mobilization of a variety of resources by diverse agents spanning different realms of social action. 相似文献
886.
ALEXANDER M. SIDORKIN 《World Futures: Journal of General Evolution》2013,69(3):183-193
The evolution of teaching is examined in three stages: apprenticeship, classical schooling, and mass schooling. All three stages use different social technologies to operate. The mass schooling is analyzed from the point of view of economic anthropology developed by Karl Polanyi, as a non-market economic system. Mass schooling uses the forms of motivation found in archaic, tribal economies: students do their homework and attend school out of considerations of reciprocity. Schools must be treated differently with respect to their improvement. School improvement should be based on perfecting existing non-market economic mechanisms, not on plunging schools into market economy. 相似文献
887.
RAYMOND A. HORN 《World Futures: Journal of General Evolution》2013,69(3):169-182
This article answers the question, How can we build capacity for the development of a critical democratic citizenry? This is achieved by generally describing postmodern society, and by introducing the idea of evolutionary consciousness as the next step in meeting the needs of a postmodern society. Secondly, the current nature of education is described, which is followed by a redefinition of education within the context of a critical ideal. The discussion concludes with a presentation of the pragmatics of building capacity for the development of a critical democratic citizenry through a redefinition of education. 相似文献
888.
NANCY C. ROBERTS 《World Futures: Journal of General Evolution》2013,69(8):595-609
The article begins with an overview of the innovation process and the entrepreneurial process, each treated as separate but interrelated phenomena. The innovation process tracks the evolution of a new idea through time, whereas the entrepreneurial process tracks the activities that entrepreneurs develop to promote and defend the idea against its detractors. The model of innovation and entrepreneurship introduced distinguishes between individual and collective entrepreneurship and identifies two types of collective entrepreneurship: team entrepreneurship and functional entrepreneurship. A Minnesota case study demonstrates the power of both team and functional entrepreneurship. It also illustrates how important the linkages are between the entrepreneurs and their larger community. An innovative idea's development and survival depends on an “ecology of organizations” that provide “venture” capital for analysis and experimentation. The vast networks of contacts and associations represent a form of social capital just as important as the community's economic capital. In this case, both aspects of social creativity—the community resources and the network of social relations—were found to be instrumental in passing and implementing the first public school choice program in the country. 相似文献
889.
890.