全文获取类型
收费全文 | 16328篇 |
免费 | 709篇 |
国内免费 | 14篇 |
出版年
2023年 | 89篇 |
2021年 | 146篇 |
2020年 | 256篇 |
2019年 | 313篇 |
2018年 | 427篇 |
2017年 | 430篇 |
2016年 | 483篇 |
2015年 | 322篇 |
2014年 | 427篇 |
2013年 | 1845篇 |
2012年 | 741篇 |
2011年 | 794篇 |
2010年 | 477篇 |
2009年 | 496篇 |
2008年 | 686篇 |
2007年 | 676篇 |
2006年 | 668篇 |
2005年 | 606篇 |
2004年 | 571篇 |
2003年 | 590篇 |
2002年 | 548篇 |
2001年 | 301篇 |
2000年 | 273篇 |
1999年 | 254篇 |
1998年 | 233篇 |
1997年 | 246篇 |
1996年 | 222篇 |
1995年 | 207篇 |
1994年 | 184篇 |
1993年 | 183篇 |
1992年 | 172篇 |
1991年 | 179篇 |
1990年 | 165篇 |
1989年 | 136篇 |
1988年 | 117篇 |
1987年 | 132篇 |
1986年 | 139篇 |
1985年 | 183篇 |
1984年 | 181篇 |
1983年 | 151篇 |
1982年 | 153篇 |
1981年 | 153篇 |
1980年 | 133篇 |
1979年 | 126篇 |
1978年 | 130篇 |
1977年 | 123篇 |
1976年 | 111篇 |
1975年 | 102篇 |
1974年 | 121篇 |
1973年 | 93篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
151.
Christie B. Gardiner Margaret M. Beaumont J. Graham Eason Ken Davidoff Jules B. Richardson John T. E. Messer David Newstead Steve 《Current psychology (New Brunswick, N.J.)》1986,5(2):205-216
Current Psychology - 相似文献
152.
This paper describes a simple infrared photocell circuit that is inexpensive and easy to construct. The light source and detector are housed inexpensively and are focused so the light and detector may be separated over significant distances. The circuit may be used in a variety of conditions, including total darkness and bright fluorescent lighting, without having to readjust or recalibrate the circuitry. Output from the circuit may be used to drive other transistors or electromechanical relays. With minimal additional circuitry and hardware the signal may be interfaced with an Apple computer. 相似文献
153.
Attention, Perception, & Psychophysics - Speech perception abilities are modified by linguistic experience to maximize sensitivity to acoustic contrasts that are important for one’s... 相似文献
154.
Subjects were able to respond to a lens-induced stereoscopic slant more quickly and more accurately when it was imposed on only part of a surface rather than on the whole surface. This shows that the presence of a stereoscopic boundary, where disparity is discontinuous, increases the efficiency of stereoscopic processing. This finding is not consistent with many current models of stereopsis. 相似文献
155.
Six tasks administered on a MINC-11 minicomputer were used in studying the effects of long, continuous work periods and fatigue on physical and cognitive task performance. Submaximal physiological workload measurement was done during one of these tasks for a subject walking on a treadmill. The MINC-11 system is described, as are the six tasks programs. Four of these tasks measured various types of reaction times, another involved complex information processing, and one appraised moods, physical symptoms, fatigue, and the physiological status of subjects. 相似文献
156.
Simulations of space use by animals were run to determine the relationship among home range area estimates, variability, and sample size (number of locations). As sample size increased, home range size increased asymptotically, whereas variability decreased among mean home range area estimates generated by multiple simulations for the same sample size. Our results suggest that field workers should ascertain between 100 and 200 locations in order to estimate reliably home range area. In some cases, this suggested guideline is higher than values found in the few published studies in which the relationship between home range area and number of locations is addressed. Sampling differences for small species occupying relatively small home ranges indicate that fewer locations may be sufficient to allow for a reliable estimate of home range. Intraspecific variability in social status (group member, loner, resident, transient), age, sex, reproductive condition, and food resources also have to be considered, as do season, habitat, and differences in sampling and analytical methods. Comparative data still are needed. 相似文献
157.
Richard A. Schmidt Stan C.A.M. Gielen Pieter J.M. Van Den Heuvel 《Acta psychologica》1984,57(2):145-164
When an imperative visual stimulus is paired with an auditory (accessory) stimulus, RT is generally faster than with the imperative stimulus alone. Three experiments using additive-factors logic tested an energy-summation view of the accessory, where effects are due to increased rate of information build-up in sensory stages, and a preparation-enhancement view which holds that the accessory serves an alerting function. Experiment 1 found no interaction between the accessory presence and (visual) stimulus brightness, suggesting no role of the accessory in stimulus identification. Experiment 2 found no interaction between accessory presence and spatial S-R compatibility, arguing that the accessory operated in stage(s) other than response selection. Experiment 3 produced an interaction between the accessory and movement complexity, arguing for accessory effects in a response-programming stage. The data generally favored preparation-enhancement, and offered no support for an energy-summation view. 相似文献
158.
David Navon 《Acta psychologica》1984,55(3):273-280
Researchers sometimes report an effect of an experimental manipulation on a dependent variable in terms of the difference between levels of a certain nuisance variable required in the different experimental conditions to reach a given criterion of behavior. This method, however, may yield illusory impressions about magnitude of effects. 相似文献
159.
160.
A comparison of the WISC-R and the Woodcock-Johnson Psycho-Educational Educational Battery (W-J) was made for children with regular and learning-disabled (LD) class placement. The W-J and Wechsler Intelligence Scale for Children-Revised (WISC-R) evidence low to moderate correlations and significant mean differences, indicating that the two tests are measuring somewhat different abilities to somewhat differing degrees. W-J—WISC-R correlations for the regular students exceed those of the LD students in the greater majority of the cases. Rank ordering of the WISC-R subtests and the W-J clusters indicate, as might be expected, that the LD students fare the worst in the WISC-R academic subtests (Arithmetic, Information and Vocabulary) and in the W-J academic clusters. More research needs to be conducted with the W-J before it should be adopted for use in the placement of exceptional children. 相似文献