全文获取类型
收费全文 | 53088篇 |
免费 | 2182篇 |
国内免费 | 27篇 |
出版年
2020年 | 597篇 |
2019年 | 691篇 |
2018年 | 942篇 |
2017年 | 936篇 |
2016年 | 1037篇 |
2015年 | 752篇 |
2014年 | 896篇 |
2013年 | 4193篇 |
2012年 | 1701篇 |
2011年 | 1713篇 |
2010年 | 1066篇 |
2009年 | 1068篇 |
2008年 | 1521篇 |
2007年 | 1512篇 |
2006年 | 1391篇 |
2005年 | 1307篇 |
2004年 | 1207篇 |
2003年 | 1168篇 |
2002年 | 1167篇 |
2001年 | 1528篇 |
2000年 | 1476篇 |
1999年 | 1122篇 |
1998年 | 609篇 |
1997年 | 562篇 |
1996年 | 530篇 |
1992年 | 1007篇 |
1991年 | 971篇 |
1990年 | 959篇 |
1989年 | 851篇 |
1988年 | 810篇 |
1987年 | 810篇 |
1986年 | 851篇 |
1985年 | 951篇 |
1984年 | 750篇 |
1983年 | 681篇 |
1981年 | 515篇 |
1979年 | 801篇 |
1978年 | 543篇 |
1977年 | 528篇 |
1976年 | 522篇 |
1975年 | 698篇 |
1974年 | 789篇 |
1973年 | 812篇 |
1972年 | 685篇 |
1971年 | 637篇 |
1970年 | 608篇 |
1969年 | 608篇 |
1968年 | 791篇 |
1967年 | 704篇 |
1966年 | 630篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
61.
62.
T. J. Roper R. A. Boakes 《The Quarterly Journal of Experimental Psychology Section B: Comparative and Physiological Psychology》1981,33(2):137-140
TOATES, F. Animal Behaviour: A Systems Approach. Chichester: John Wiley and Sons. 1980. Pp. 299. Hardback £17. Paper back £6.40 ISBN 0 471 27724.
DICKINSON, A. Contemporary Animal Learning Theory. Cambridge: University Press. 1980. Pp. 177. Hardback £12.50. Paperback £3.95. ISBN 0 521 23469 7. 相似文献
DICKINSON, A. Contemporary Animal Learning Theory. Cambridge: University Press. 1980. Pp. 177. Hardback £12.50. Paperback £3.95. ISBN 0 521 23469 7. 相似文献
63.
RENNEKER R 《The Psychoanalytic quarterly》1952,21(4):528-536
64.
65.
Although a great deal of research has been conducted on the relationship between social support and physical health, the contribution of personality characteristics to this relationship has rarely been assessed. Structural equation modeling was employed to derive and test a model of the direct and indirect relationships between personality characteristics, social network size, the perceived availability of support, socially supportive behaviors, and perceived physical health with a sample of Pennsylvania adults. Significant paths indicate that individuals who perceive themselves as affiliative and as help seekers and help givers report larger social networks, receive more socially supportive behaviors, and perceive that more support is available to them. The perception that support is available shared a direct relationship with perceived physical health. The utility of including multiple measures of social support and personality characteristics related to receiving support in investigations of the relationship between social support and physical health is discussed. 相似文献
66.
David Temperley 《Cognitive Science》2019,43(2)
Main clause phenomena (MCPs) are syntactic constructions that occur predominantly or exclusively in main clauses. I propose a processing explanation for MCPs. Sentence processing is easiest at the beginning of the sentence (requiring less search); this follows naturally from widely held assumptions about sentence processing. Because of this, a wider variety of constructions can be allowed at the beginning of the sentence without overwhelming the sentence‐processing mechanism. Unlike pragmatic and grammatical accounts of MCPs, the processing account predicts avoidance of MCPs in non‐initial main clauses (non‐initial coordinate clauses and premodified clauses). A corpus study supports these predictions, but it is somewhat inconclusive. A further corpus study examines another type of syntactic construction, premodifying adjunct phrases (“openers”); the prediction here is that less common types of opener will be especially avoided in non‐initial contexts. The prediction is confirmed, supporting the processing view of rare constructions. 相似文献
67.
David S. Geldmacher 《Brain and cognition》1996,32(3):405-415
Cancellation tests are commonly used in the clinical assessment of visuospatial function, but there has been little study of task characteristics influencing performance. This study was designed to assess factors which affect cancellation performance. Sixteen healthy subjects sequentially performed four random-array letter cancellation tasks. The forms contained 50 and 100 stimuli and target:distractor (T/D) ratios of 1:4 and 1:9 with target letter “A” and randomly selected letter distractors. The primary performance measure was calculated as the number of correctly cancelled targets divided by the time to complete the task, corrected for accuracy. This measure revealed a strong effect of T/D ratio (p< .0001), with performance adversely affected by higher proportion of distractors. There was no effect of stimulus number. This suggests that T/D ratio should be considered in cancellation test design and interpretation. 相似文献
68.
69.
70.