全文获取类型
收费全文 | 857篇 |
免费 | 47篇 |
专业分类
904篇 |
出版年
2020年 | 12篇 |
2019年 | 16篇 |
2018年 | 22篇 |
2017年 | 13篇 |
2016年 | 20篇 |
2015年 | 17篇 |
2014年 | 12篇 |
2013年 | 77篇 |
2012年 | 21篇 |
2011年 | 19篇 |
2010年 | 14篇 |
2009年 | 8篇 |
2008年 | 31篇 |
2007年 | 41篇 |
2006年 | 21篇 |
2005年 | 25篇 |
2004年 | 27篇 |
2003年 | 34篇 |
2002年 | 23篇 |
2001年 | 17篇 |
2000年 | 13篇 |
1999年 | 10篇 |
1998年 | 22篇 |
1997年 | 18篇 |
1996年 | 25篇 |
1995年 | 11篇 |
1994年 | 13篇 |
1993年 | 14篇 |
1992年 | 17篇 |
1991年 | 12篇 |
1989年 | 8篇 |
1987年 | 9篇 |
1985年 | 12篇 |
1984年 | 12篇 |
1983年 | 13篇 |
1982年 | 8篇 |
1981年 | 11篇 |
1980年 | 9篇 |
1978年 | 10篇 |
1977年 | 10篇 |
1976年 | 14篇 |
1975年 | 7篇 |
1974年 | 10篇 |
1972年 | 7篇 |
1966年 | 8篇 |
1957年 | 7篇 |
1956年 | 7篇 |
1955年 | 7篇 |
1954年 | 7篇 |
1953年 | 8篇 |
排序方式: 共有904条查询结果,搜索用时 15 毫秒
211.
212.
In water striders or other animals that communicate with vibratory or oscillatory signals, surface wave signals can be recorded, analyzed in digital form by computer, then played back accurately by oscillating a magnet, glued to the animal, with electromagnetic fluctuations from a coil driven by the computer. Signals can be played with great flexibility through a normally behaving animal, in laboratory or field. 相似文献
213.
Wayne E. Oates 《Pastoral Psychology》1969,20(9):30-44
Conclusions The conclusions set forth in this paper are of a highly tentative and even exploratory nature. I am willing to be demonstrated to be wrong at any point and excited by the realization that some of my hunches have been sufficiently far out to prompt confirmatory or invalidating research of a more precise variety. Yet I am willing to stand by my observations as to the relationship between the ethical perspective of the poor to the following seemingly unrelated events: (1) the implosion of these ethical perspectives into the middle classes, (2) through contemporary political uses of the poor by the upper classes, (3) professional interaction with the poverty community, (4) the unconscious moral identification of the middle classes with the ethics of the poor, (5) the transformation of thekinds of emotional disorder from one level of affluence to another by reason of the criterion of work as an indication of mental health, and (6) the ethical issue involved in economic determination of the use of medical and ministerial time in the care of the emotionally disturbed. 相似文献
214.
215.
Wayne A. Wickelgren 《Attention, perception & psychophysics》1967,2(8):331-337
Zero, 1, 2, or 3 black dots are tachistoscopically presented on a white field. There are two alternative tasks: (a) to decide on the presence of each of the left, middle, and right dots (multiple detection) or (b) to decide whether any of the dots was present (disjunctive detection), The results indicate that in disjunctive detection, Ss do not add together thestrengths of the three dot positions and compare this sum to a criterion. Rather they combine theirdecisions about each dot, responding “yes” to the array, if and only if they decide “yes” to any one dot. Strength distributions appear to be invariant with respect to irrelevant stimuli. Invariance with respect to report order holds approximately. However, dots reported on first are slightly more detectable. This suggests a successive scanning process, whose rate is independent of whether a stimulus is present or absent at the position scanned. 相似文献
216.
217.
218.
On each trial a sample point randomly drawn from one of two normal probability distributions was exhibited to S, who had to guess whether the sample was a “1” or a “2.” He was then given feedback, which was determined by which of the two distributions the sample point derived from. Two continua were employed: dot position on a file card, and groyness of square in. patches. Three levels of d’ were employed. The function giving the probability of a response “1” for different sample values was sharper for the higher d’ conditions, and for the dot position continuum. Cessation of feedback resulted in improved performance for the low d’ condition. Incentive payoff, confidence ratings, and experimenter had virtually no effects on task performance. 相似文献
219.
220.