全文获取类型
收费全文 | 6231篇 |
免费 | 187篇 |
国内免费 | 4篇 |
出版年
2019年 | 61篇 |
2018年 | 117篇 |
2017年 | 90篇 |
2016年 | 89篇 |
2015年 | 67篇 |
2014年 | 79篇 |
2013年 | 464篇 |
2012年 | 173篇 |
2011年 | 166篇 |
2010年 | 85篇 |
2009年 | 100篇 |
2008年 | 145篇 |
2007年 | 167篇 |
2006年 | 142篇 |
2005年 | 135篇 |
2004年 | 131篇 |
2003年 | 118篇 |
2002年 | 133篇 |
2001年 | 221篇 |
2000年 | 210篇 |
1999年 | 154篇 |
1998年 | 61篇 |
1997年 | 59篇 |
1996年 | 61篇 |
1993年 | 58篇 |
1992年 | 121篇 |
1991年 | 123篇 |
1990年 | 120篇 |
1989年 | 102篇 |
1988年 | 92篇 |
1987年 | 101篇 |
1986年 | 113篇 |
1985年 | 111篇 |
1984年 | 104篇 |
1983年 | 84篇 |
1979年 | 99篇 |
1978年 | 75篇 |
1977年 | 65篇 |
1976年 | 58篇 |
1975年 | 72篇 |
1974年 | 100篇 |
1973年 | 109篇 |
1972年 | 75篇 |
1971年 | 79篇 |
1970年 | 81篇 |
1969年 | 78篇 |
1968年 | 109篇 |
1967年 | 90篇 |
1966年 | 96篇 |
1958年 | 62篇 |
排序方式: 共有6422条查询结果,搜索用时 15 毫秒
121.
122.
123.
A. L. Wilkes P. Lloyd I. Simpson 《Quarterly journal of experimental psychology (2006)》1972,24(1):48-54
An investigation is reported into pausing and grouping during the serial learning of letter strings, when presented randomly by length and when presented in ascending order. Mean pause times for the reading and recall of longer lists were significantly greater than for lists of shorter span due to extended pausing at specific list positions. In general, reading rhythms were duplicated during recall. Subjects were highly consistent in maintaining their level of pause duration across lists and responded to additions in list length by increasing their number of groups, not by increasing group size. Triadic sequences were the most popular form of spontaneous organization. Pausing measures are discussed as indices of organizational strategies. 相似文献
124.
Donald I. Tepas Lawrence A. Boxerman A. Michael Anch 《Attention, perception & psychophysics》1972,11(3):217-221
Average evoked brain responses were computed from four simultaneous recordings during binaural tone stimulation at 10 intensity levels. Amplitudes and latencies were measured for the prominent components, and linear regression coefficients were computed. The results indicate that the sensitivity of the evoked response to stimulus intensity is dependent upon the selection of the appropriate measure. Linear amplitude functions were demonstrated. Additional research relating these responses to psychophysical measures is suggested. 相似文献
125.
126.
In two separate experiments, 40 Ss were presented with recorded sentences during each of which a click occurred. Ss had to depress a key as soon as they heard the click. RTs were f aster when the click was located at the major syntactic break of the sentence compared with RTs to clicks not at a break. This confirmed the hypothesis that processing load is a function of the surface structure of sentences, although the role of minor breaks was not clear. A second finding was that RTs were slower when the click was in the first rather than in the second half of the sentence. This can also be explained in terms of differential processing loads. 相似文献
127.
128.
Conditioned eyelid responses in phobic patients 总被引:1,自引:0,他引:1
129.
130.
The effects of amount of training per reversal on successive reversals of a color discrimination 下载免费PDF全文
I. L. Beale 《Journal of the experimental analysis of behavior》1970,14(3):345-352
Three groups of pigeons were trained on a red-green discrimination in which the stimuli were alternately presented in a multiple schedule of reinforcement. The discrimination was reversed 24 times. Groups were given 1, 2, or 4 hr of training on each discrimination. Increasing the length of training had two principal effects on reversal performance: it increased the rate of extinction of responding to one of the stimuli and increased the rate of reacquisition of responding to the other. The latter effect involved both an increase in reacquisition of responding to a positive stimulus within reversals and an increase in recovery of responding to the previous negative stimulus between reversals. Improvements in performance of each group over the series of reversals were qualitatively similar to the two effects of length of training on each discrimination, and were analogous to effects obtained in other studies involving overtraining and successive reversals of simultaneous discriminations. 相似文献