全文获取类型
收费全文 | 9311篇 |
免费 | 273篇 |
国内免费 | 1篇 |
出版年
2021年 | 47篇 |
2020年 | 107篇 |
2019年 | 88篇 |
2018年 | 155篇 |
2017年 | 163篇 |
2016年 | 224篇 |
2015年 | 250篇 |
2014年 | 277篇 |
2013年 | 1152篇 |
2012年 | 394篇 |
2011年 | 382篇 |
2010年 | 324篇 |
2009年 | 365篇 |
2008年 | 414篇 |
2007年 | 351篇 |
2006年 | 370篇 |
2005年 | 254篇 |
2004年 | 287篇 |
2003年 | 223篇 |
2002年 | 208篇 |
2001年 | 118篇 |
2000年 | 128篇 |
1999年 | 114篇 |
1998年 | 100篇 |
1997年 | 95篇 |
1996年 | 103篇 |
1995年 | 106篇 |
1994年 | 115篇 |
1993年 | 104篇 |
1992年 | 105篇 |
1991年 | 106篇 |
1990年 | 104篇 |
1989年 | 105篇 |
1988年 | 117篇 |
1987年 | 107篇 |
1986年 | 75篇 |
1985年 | 101篇 |
1984年 | 91篇 |
1983年 | 80篇 |
1982年 | 107篇 |
1981年 | 85篇 |
1980年 | 105篇 |
1979年 | 108篇 |
1978年 | 100篇 |
1977年 | 115篇 |
1976年 | 136篇 |
1975年 | 113篇 |
1974年 | 100篇 |
1973年 | 67篇 |
1971年 | 42篇 |
排序方式: 共有9585条查询结果,搜索用时 15 毫秒
51.
This study sought to investigate the effects of mild head injury on a particular type of cognitive ability, verbal analogical
reasoning. The performance of 19 individuals with head injuries was compared to a group of 30 control subjects matched for
age, education, and gender on 100 verbal analogies. Solution times and error rates were modeled. Unstandardized regression
weights for individual subjects were correlated with subjects’ performance on a number of standardized ability tests. Results
showed that compared to the control subjects, the head injured subjects: (a) were significantly slower to solve the analogies,
and were particularly slow to perform certain processes: encoding/inference and comparison; (b) tended to show greater variability
in performance; and (c) had data that had a poorer componential model fit. The data suggest that analogical reasoning is affected
by a head injury, and that certain information processes may be responsible for performance deficits. 相似文献
52.
53.
54.
Stephen W. Kohlmeyer 《Behavior research methods》1992,24(1):67-71
Picture Perception Lab (PPL) is a program for picture perception experiments. PPL capitalizes on the sophisticated drawing software available for the Macintosh computer by allowing the user to create stimulus images by using almost any drawing package. Through a series of user-friendly dialog boxes, PPL enables even nonprogrammers to develop, quickly and easily, tachistoscopelike vision experiments. The program allows a wide variety of experimental designs. Image exposure durations and subjects’ reaction times are precisely monitored with millisecond timing functions. Each image is drawn on the screen in a single 60-Hz refresh. 相似文献
55.
Stephen Handel 《Attention, perception & psychophysics》1992,52(5):497-507
Listeners judged whether two five-tone nonmetric rhythms were the same or different. Each rhythm was presented one, two, or four times to study the process of perceptual differentiation. The results indicated that the listeners perceived these rhythms in-terms.of the grouping of the tones, and not in terms of the timing between the groups. Two rhythms that had the same perceptual grouping were judged as being identical, even if the timing between the groups was different. The perception of the groupings of tones developed gradually. If each rhythm was presented only once, then the listeners had only a global percept, focused on groups (runs) of three elements, and often judged two different rhythms as being identical. If the rhythms were presented two or four times, then the grouping of the tones became more differentiated and the listeners were less likely to judge different patterns as being identical. Thus, perception of auditory rhythmic structure appears to follow the same developmental process as the perception of visual spatial structure. 相似文献
56.
57.
In four experiments employing between-list designs, generation was found to have negative effects on free recall of word pairs and on cued recall of the second word. In addition, generation had negative effects on measures of word-pair integration and on clustering in recall. In contrast, positive effects of generation were found on free recall of second words alone, and on a recognition test for memory of the second word. It was concluded that in between-list designs, generation led to greater individual-item processing of the generated term than reading, but this processing occurred at the expense of processing the relation between the words in a pair and processing the relations between different pairs in a list. 相似文献
58.
The relation between awareness of body topology and auditory comprehension of body part names was studied in 22 aphasic subjects. Two nonverbal tasks—human figure drawing and placement of individual body parts in relation to a drawn face—were compared with two auditory tests of body part comprehension. The two nonverbal and the two verbal tasks were closely correlated with each other, but there was no relation involving either of the verbal tests with either of the nonverbal tests. Selection errors in the auditory comprehension tasks were predominantly semantically based and equally distributed between functionally analogous parts and parts related by location on the body.Dr. Benedet's effort in this study was supported by a grant from the Hispano-North American Joint Committee for Cultural and Educational Cooperation. 相似文献
59.
Dr. Juan C. Saavedra-Aguilar M.D. Lic. Juan S. Gómez-Jeria Lic.Q. 《Journal of Near-Death Studies》1989,7(4):265-272
This work has received financial support from FONDECYT (Project 1111-88). The authors also acknowledge the helpful comments of Dr. Bruce Cassels. 相似文献
60.