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   515篇
  免费   6篇
  521篇
  2024年   8篇
  2023年   6篇
  2022年   3篇
  2021年   4篇
  2020年   18篇
  2019年   19篇
  2018年   17篇
  2017年   21篇
  2016年   33篇
  2015年   9篇
  2014年   16篇
  2013年   54篇
  2012年   23篇
  2011年   30篇
  2010年   29篇
  2009年   18篇
  2008年   31篇
  2007年   23篇
  2006年   20篇
  2005年   14篇
  2004年   16篇
  2003年   9篇
  2002年   9篇
  2001年   11篇
  2000年   4篇
  1999年   8篇
  1998年   2篇
  1995年   3篇
  1994年   2篇
  1992年   2篇
  1991年   3篇
  1990年   2篇
  1989年   2篇
  1988年   3篇
  1987年   5篇
  1986年   2篇
  1985年   3篇
  1983年   4篇
  1982年   6篇
  1978年   3篇
  1977年   2篇
  1976年   4篇
  1975年   3篇
  1973年   3篇
  1972年   1篇
  1971年   3篇
  1970年   2篇
  1969年   1篇
  1968年   1篇
  1967年   1篇
排序方式: 共有521条查询结果,搜索用时 0 毫秒
371.
372.
373.
    

Fifty years after the first humans stepped on the Moon, space faring nations have entered a new era of space exploration. NASA’s reference mission to Mars is expected to comprise 1100 days. Deep space exploratory class missions could even span decades. They will be the most challenging and dangerous expeditions in the history of human spaceflight and will expose crew members to unprecedented health and performance risks. The development of adverse cognitive or behavioral conditions and psychiatric disorders during those missions is considered a critical and unmitigated risk factor. Here, we argue that spatial cognition, i.e., the ability to encode representations about self-to-object relations and integrate this information into a spatial map of the environment, and their neural bases will be highly vulnerable during those expeditions. Empirical evidence from animal studies shows that social isolation, immobilization, and altered gravity can have profound effects on brain plasticity associated with spatial navigation. We provide examples from historic spaceflight missions, spaceflight analogs, and extreme environments suggesting that spatial cognition and its neural circuitry could be impaired during long-duration spaceflight, and identify recommendations and future steps to mitigate these risks.

  相似文献   
374.
    
There is significant disagreement among feminists and liberals about the compatibility between the two doctrines. Political liberalism has come under particular criticism from feminists, who argue that its restricted form of equality is insufficient. In contrast, Lori Watson and Christie Hartley argue that political liberalism can and must be feminist. This article raises three areas of disagreement with Watson and Hartley’s incisive account of feminist political liberalism. First, it argues that an appeal to a comprehensive doctrine can be compatible with respecting others, if that appeal is to the value of equality. Second, it takes issue with Watson and Hartley's defence of religious exemptions to equality law. Third, it argues that political liberalism can be compatible with feminism but that it is not itself adequately feminist. It concludes that political liberalism is not enough for feminists.  相似文献   
375.
    
A quickly expanding literature has examined the link between physical disgust and morality. This article critically integrates the existing evidence and draws the following conclusions: First, there is considerable evidence that experimentally induced disgust and cleanliness influence moral judgment, but moderating variables and attributional processes need to be considered. Second, moral considerations have substantial effects on behavioural concomitants of disgust, such as facial expressions, economic games and food consumption. Third, while disgust involves a conservation concern, it can manifest itself in both liberal and conservative political attitudes. Overall, disgust can be considered to form part of a behavioural loss aversion system aimed at protecting valuable resources, including the integrity of one’s body. Recommendations are offered to investigate the role of disgust more rigorously in order to fully capture its role in moral life.  相似文献   
376.
377.
Past research has verified that observers assume that objects are reliably oriented with respect to a gravitationally centered coordinate system. Observers also appear to attend more to specific parts of objects, like faces, that typically are closer to the top. In the present work, we explored whether or not observers have a generic bias to view tops as being more salient than bottoms. In three experiments, observers indicated whether random shapes appeared to be more similar to comparison shapes that shared identical tops rather than bottoms. Observers exhibited a reliable tendency to match figures with similarly shaped tops. Matching choice was also a function of global shape attributes such as axis of elongation or size. The findings are consistent with the notion that, in nature, tops tend to be the most visible part and to provide the best information with respect to important aspects of objects such as animal intentionality and artifact functionality.  相似文献   
378.
The interacting effects of sentence context and grammatical gender on lexical access were investigated in Italian using a timed picture-naming paradigm. Results snowed large interacting effects of both sentence context and the gender of the article, with facilitation relative to two different control conditions. Repeat testing yielded an overall decrease in RT, but did not change the pattern of results. Results are interpreted in support of interactive activation models in which different sources of information are combined on-line to predict, anticipate or preactivate lexical targets.  相似文献   
379.
CASPER is a psychometrics software package suitable for instructional and research applications with IBM-PC-compatible computers. CASPER lets the user simulate or directly enter psychometric data. Numerous statistical analyses, file handling procedures, and graphics are included Analyses include factor analysis, multiple regression, correlation/partial correlation, moments analysis, reliability analysis, and item analysis.  相似文献   
380.
Subjects were presented with a list of digits to alternate ears for serial recall. The list was followed by a suffix, a redundant acoustic event which did not have to be recalled. The suffix was presented either to one of the ears or binaurally. In all cases the suffix gave rise to a selective impairment of recall of the final items in the list. The results are interpreted as showing first that stimuli of the kind used are processed by simultaneously selecting both ears rather than by switching attention, and second that the site of the suffix effect is after the selection mechanism.  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