全文获取类型
收费全文 | 102755篇 |
免费 | 4235篇 |
国内免费 | 37篇 |
专业分类
107027篇 |
出版年
2020年 | 1107篇 |
2019年 | 1366篇 |
2018年 | 1892篇 |
2017年 | 1955篇 |
2016年 | 2056篇 |
2015年 | 1479篇 |
2014年 | 1755篇 |
2013年 | 8341篇 |
2012年 | 3287篇 |
2011年 | 3410篇 |
2010年 | 2101篇 |
2009年 | 2118篇 |
2008年 | 2973篇 |
2007年 | 2980篇 |
2006年 | 2731篇 |
2005年 | 2372篇 |
2004年 | 2282篇 |
2003年 | 2173篇 |
2002年 | 2212篇 |
2001年 | 3289篇 |
2000年 | 3150篇 |
1999年 | 2381篇 |
1998年 | 1175篇 |
1997年 | 1043篇 |
1996年 | 1080篇 |
1995年 | 986篇 |
1993年 | 967篇 |
1992年 | 1999篇 |
1991年 | 1868篇 |
1990年 | 1882篇 |
1989年 | 1731篇 |
1988年 | 1689篇 |
1987年 | 1605篇 |
1986年 | 1648篇 |
1985年 | 1704篇 |
1984年 | 1443篇 |
1983年 | 1286篇 |
1982年 | 942篇 |
1979年 | 1515篇 |
1978年 | 1109篇 |
1975年 | 1220篇 |
1974年 | 1355篇 |
1973年 | 1465篇 |
1972年 | 1217篇 |
1971年 | 1144篇 |
1970年 | 1018篇 |
1969年 | 1036篇 |
1968年 | 1303篇 |
1967年 | 1173篇 |
1966年 | 1059篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
51.
52.
Vladimir M. Sloutsky Yevgeniya Goldvarg 《The Quarterly Journal of Experimental Psychology Section A: Human Experimental Psychology》2004,57(4):636-665
Logical connectives, such as “AND”, “OR”, “IF . . . THEN”, and “IF AND ONLY IF” are ubiquitous in both language and cognition; however, reasoning with logical connectives is error-prone. We argue that some of these errors may stem from people's tendency to minimize the number of possibilities compatible with logical connectives and to construct a “minimalist” one-possibility representation. As a result, connectives denoting a single possibility (e.g., conjunctions) are likely to be represented correctly, whereas connectives denoting multiple possibilities (e.g., disjunctions or conditionals) are likely to be erroneously represented as conjunctions. These predictions were tested and confirmed in three experiments using different paradigms. In Experiment 1, participants were presented with a multiple-choice task and asked to select all and only those possibilities that would indicate that compound verbal propositions were true versus false. In Experiment 2, a somewhat similar task was used, except that participants were asked later to perform a cued recall of verbal propositions. Finally, Experiment 3 used an old/new recognition paradigm to examine participants' ability to accurately recognize different logical connectives. The results of the three experiments are discussed in relation to theories of representation of possibilities and theories of reasoning. 相似文献
53.
Reducing STD/HIV Stigmatizing Attitudes Through Community Popular Opinion Leaders in Chinese Markets
Reducing STDs and HIV/AIDS incidence requires campaigns designed to change knowledge, attitudes, and practices of risky sexual behavior. In China, a significant obstacle to such changes is the stigma associated with these diseases. Thus 1 campaign intervention strategy is to train credible community leaders to discuss these issues in everyday social venues. This study tested the effectiveness of such an approach on reducing HIV/AIDS stigma, across 2 years, from a sample of over 4,500 market vendors, in 3 conditions. Results showed an increasing growth in market communication about intervention messages, and concomitant declines in stigmatizing attitudes, across time, with the greatest changes in community popular opinion leaders, significant changes in intervention nonopinion leaders, and little change in the control markets. 相似文献
54.
55.
The ability to make egocentric distance estimates of a single point source of light, seen in darkness and without the cues of changing size and luminance, was investigated in sixteen observers. The attenuation required to maintain constant luminance, when the target was viewed from different distances, was shown to follow the inverse square law providing the angle subtended by the light was less than 20 s arc. Distance changes were also simulated by means of a split mirror which produced vergence cues, or by test lenses to provide accommodation cues. Over the range 0.5 to 9.2 m distance estimates were surprisingly accurate, although there was some overestimation of near and underestimation of far distances. Most observers made good judgements when only convergence cues were varied, whereas no observers made consistently good judgements when only accommodation cues were varied. The difficulties are discussed in terms of the accommodation-convergence link. When distance was simulated by changing convergence and accommodation cues, estimates were not as good as when real distance was changed. Since good estimates were made with brief target exposures, these judgements were not based on subsequent convergence or accommodation changes. It is suggested that the metric or reference against which the apparently absolute judgements were made was the efferent demand signal associated with a 'resting' position of convergence in darkness. 相似文献
56.
57.
58.
59.
60.
Mark J. Landau Daniel Sullivan Laura A. King 《Social and Personality Psychology Compass》2010,4(10):906-917
Drawing on terror management theory (TMT), we discuss the psychological motivations that shape personality at two levels: the characteristically human personality common to us all and the individual differences that distinguish some people from others. TMT posits that the motivation to protect the self against deep-rooted fears about mortality drives people to maintain meaningful, reliable conceptions of reality and positive evaluations of themselves, two broad tendencies that form the foundation of every person’s personality. We review studies showing that mortality reminders increase efforts to bolster cultural sources of meaning and self-esteem in similar ways across individuals and cultures. TMT also posits that individual differences in personality partly reflect the different sources of meaning and self-esteem that people invest in to assuage mortality fears. We review evidence that individual differences predict the degree and direction of people’s defensive responses to mortality reminders. Directions for future research are discussed. 相似文献