全文获取类型
收费全文 | 6400篇 |
免费 | 274篇 |
国内免费 | 12篇 |
出版年
2023年 | 57篇 |
2022年 | 44篇 |
2021年 | 59篇 |
2020年 | 124篇 |
2019年 | 153篇 |
2018年 | 207篇 |
2017年 | 194篇 |
2016年 | 211篇 |
2015年 | 128篇 |
2014年 | 164篇 |
2013年 | 766篇 |
2012年 | 263篇 |
2011年 | 277篇 |
2010年 | 201篇 |
2009年 | 181篇 |
2008年 | 232篇 |
2007年 | 261篇 |
2006年 | 224篇 |
2005年 | 224篇 |
2004年 | 213篇 |
2003年 | 188篇 |
2002年 | 197篇 |
2001年 | 112篇 |
2000年 | 84篇 |
1999年 | 92篇 |
1998年 | 96篇 |
1997年 | 73篇 |
1996年 | 93篇 |
1995年 | 85篇 |
1994年 | 97篇 |
1993年 | 80篇 |
1992年 | 90篇 |
1991年 | 65篇 |
1990年 | 62篇 |
1989年 | 68篇 |
1988年 | 65篇 |
1987年 | 61篇 |
1986年 | 59篇 |
1985年 | 76篇 |
1984年 | 60篇 |
1983年 | 68篇 |
1982年 | 59篇 |
1981年 | 52篇 |
1980年 | 54篇 |
1979年 | 46篇 |
1978年 | 60篇 |
1977年 | 51篇 |
1975年 | 33篇 |
1974年 | 45篇 |
1973年 | 33篇 |
排序方式: 共有6686条查询结果,搜索用时 15 毫秒
91.
Lee Shang Lin Tommy Ahmed Saheeb Horbal Logan Pietruszewski Thomas Hu Qingli Markus Etan J. 《Animal cognition》2023,26(2):703-708
Animal Cognition - Exploring new and unfamiliar environments is critical for survival, providing information on food, shelter, mates, and sources of danger. The open field paradigm is commonly used... 相似文献
92.
93.
Intermodal perceptual equivaience was investigated, using visual and tactual oddity discrimination and cross-modal matching-to-sample tasks. Four groups of Ss were presented with 100 problems made up of randomly derived forms from five levels of sidedness. The same quadratic relationship was observed for all tasks as a function of complexity, with optimal performance at eight sides. Comman information utilization, as indicated by intercorrelations of performance variables and by correlational analyses with differences in form measures, was not as pronounced within side classes. Evidence concerning the nature of pattern-feature usage in discrimination was obtained from graphical analyses. 相似文献
94.
The plastic barrel suit provides complete protection of chronically implanted fistulas and electrical connectors. The lost time, expense, and the frustrations of having these devices damaged was avoided. 相似文献
95.
Mary Williams 《The Journal of analytical psychology》1969,14(1):85-86
S idney L evin and R alph J. K ahana (Eds). Psychodynamic studies on ageing
H ans D ieckmann : Probleme der Lebensmitte—Krise, Umkehr, Neubeginn 相似文献
H ans D ieckmann : Probleme der Lebensmitte—Krise, Umkehr, Neubeginn 相似文献
96.
97.
3 groups of university freshmen took the SAT-V before and after a course in Accelerated Reading. The mean post-test scores for 2 groups increased slightly less than 10 points, while the mean post-test score for the third group decreased significantly. It is concluded that for the type of students used in this study, a course emphasizing speed and accuracy of reading is not of value in increasing scores on the verbal part of the Scholastic Aptitude Test. 相似文献
98.
Wayne Lee 《Psychometrika》1966,31(3):397-412
A method of design symbolization (DS) is given for a class of designs in which all factors are related by complete crossing or by nesting. Characterization of acceptable DS's, and logical relational properties are given. It is shown how the design model can be obtained from the DS.The preparation of this article was supported by NIH Grant GM-11128, and by grants to the Institute of Human Learning by NSF and NIH. 相似文献
99.
Allen Parducci Louise M. Marshall Mary Degner 《Attention, perception & psychophysics》1966,1(2):83-86
An adaptation-level model for memory was tested by interpolating different weights between the standard and comparison weights. The results suggest that the model should be modified to account for the general tendency to use alternative categories of judgment with equal frequency. In terms of the modified model, memory for the standard shifts toward the value of the interfering stimulus, the magnitude of shift being proportional to the difference between the interfering stimulus and the value the memory would otherwise have had. 相似文献
100.