全文获取类型
收费全文 | 21813篇 |
免费 | 81篇 |
专业分类
21894篇 |
出版年
2023年 | 13篇 |
2021年 | 25篇 |
2020年 | 37篇 |
2019年 | 28篇 |
2018年 | 3515篇 |
2017年 | 2843篇 |
2016年 | 2285篇 |
2015年 | 220篇 |
2014年 | 114篇 |
2013年 | 239篇 |
2012年 | 643篇 |
2011年 | 2439篇 |
2010年 | 2556篇 |
2009年 | 1509篇 |
2008年 | 1732篇 |
2007年 | 2223篇 |
2006年 | 66篇 |
2005年 | 263篇 |
2004年 | 205篇 |
2003年 | 137篇 |
2002年 | 96篇 |
2001年 | 55篇 |
2000年 | 80篇 |
1999年 | 51篇 |
1998年 | 34篇 |
1997年 | 27篇 |
1996年 | 19篇 |
1995年 | 16篇 |
1994年 | 18篇 |
1993年 | 17篇 |
1992年 | 20篇 |
1991年 | 23篇 |
1990年 | 23篇 |
1989年 | 15篇 |
1988年 | 14篇 |
1987年 | 21篇 |
1986年 | 14篇 |
1985年 | 14篇 |
1983年 | 11篇 |
1982年 | 12篇 |
1980年 | 13篇 |
1979年 | 20篇 |
1976年 | 12篇 |
1974年 | 16篇 |
1973年 | 16篇 |
1971年 | 14篇 |
1969年 | 13篇 |
1968年 | 12篇 |
1967年 | 12篇 |
1966年 | 12篇 |
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
31.
Vision and active touch lead to similar patterns of constant error for the perception of interpolated position in twodimensional and one-dimensional regions, though the errors for touch are larger than those for vision. The error patterns for the orientation of a radius of a semicircle are more complex, but can be interpreted as due to the interaction of two sets of anchors rather than the single pair available for the linear interpolation. The greater size of the touch errors is interpreted as due to a relative overestimation of larger distances by active touch or of smallerdistances by vision. 相似文献
32.
33.
M. M. Taylor 《Attention, perception & psychophysics》1966,1(2):113-119
When an observer is confronted with a stimulus pattern that in some aspect does not change over time, perception of that aspect of the pattern does change. This paper documents several different types of change, all of which progress linearly with the square root of the observing time. Examples are drawn from studies of figurai after-effects, motion after-effects, vigilance, motion neutralization, visibility of the stabilized retinal image, effects of contours on visibility and fluctuations in the perceptual organization of ambiguous figures. 相似文献
34.
M. M. Taylor 《Quarterly journal of experimental psychology (2006)》1966,18(2):175-177
Data recently presented by Wilson (1965) seem to demonstrate the separate effects of adaptation and of after-effect repulsion during and following continued observation of a curved line. Inasmuch as the experiment was performed without apparent reference to the psychophysical theory of figural after-effects (Taylor, 1962), it is interesting to note that the results on adaptation agree qualitatively with one of the major presuppositions of the theory, and the results on repulsion agree quantitatively with its predictions. 相似文献
35.
36.
37.
Carol Taylor 《Theoretical medicine and bioethics》1990,11(2):111-124
In this paper a case is used to demonstrate how ethical analysis enables health care professionals, patients and family members to make treatment decisions which ensure that medical technologies are used in the overall best interests of the patient. The claim is made and defended that ethical analysis can secure four beneficial outcomes when medical technologies are employed: (1) not allowing any medical technologies to be employed until the appropriate decision makers are identified and consulted; (2) insisting that medical technologies be employed not merely to promote the medical interests of the patient but rather on the basis of their ability to contribute to the overall well-being of the patient; (3) challenging caregivers to reflect on the dynamic interplay between their conscious and unconscious values and consequent determinations of what is in the patient's best interests; and (4) providing a justification for selected interventions which makes possible rational dialogue between caregivers espousing different viewpoints about treatment options. 相似文献
38.
Thirty-eight male college students, classified as either Type A or Type B based on their Jenkins Activity Survey (JAS-T) scores, competed in a reaction time task that allowed them to administer shocks to an increasingly provocative fictitious opponent. Salivary testosterone and cortisol were measured both prior to and after the task. Aggression was defined as the level of shock the subject was willing to set for the opponent. The results of this study indicate that a relationship exists between endogenous testosterone levels in men and direct physical aggression. Some evidence for the moderating effects of hormones on the level of aggression expressed by Type As was observed. No direct relationship between Type A and aggression was found. 相似文献
39.
40.
This study analysed the way 20 managers in the information technology industry in Australia viewed their lives, and identified two dimensions of central importance cutting across the work, family and leisure spheres encompassed by them. One dimension was positively loaded towards activities which were challenging, creative and under the individual's control. These activities were enjoyable, and included examples such as consulting with clients, creating new business, and communicating and dealing with others, whether at work or at home. The opposite pole of this dimension involved activities such as completing paperwork, general administration, doing the shopping, and disciplining the children. Such activities were seen as necessary, routine or stressful, and were generally disliked. The other dimension dealt with activities which, at one pole, were emotionally involving or involved moral standards, and included examples such as attending meetings, doing things as a family, and settling disputes, either at work or at home. At the other pole were activities which were usually done alone and involved no sense of social or moral obligation. Leisure activities typically fell into this category. The results indicated that these managers generally pursued a lifestyle which was seen to be non-stressful, and one valued for the challenge, enjoyment, freedom of choice and personal control which it offered. 相似文献