全文获取类型
收费全文 | 41940篇 |
免费 | 1589篇 |
国内免费 | 22篇 |
专业分类
43551篇 |
出版年
2020年 | 434篇 |
2019年 | 423篇 |
2018年 | 707篇 |
2017年 | 686篇 |
2016年 | 712篇 |
2015年 | 461篇 |
2014年 | 634篇 |
2013年 | 3070篇 |
2012年 | 1169篇 |
2011年 | 1278篇 |
2010年 | 730篇 |
2009年 | 781篇 |
2008年 | 1096篇 |
2007年 | 1086篇 |
2006年 | 1008篇 |
2005年 | 892篇 |
2004年 | 862篇 |
2003年 | 819篇 |
2002年 | 822篇 |
2001年 | 1430篇 |
2000年 | 1421篇 |
1999年 | 1073篇 |
1998年 | 475篇 |
1997年 | 410篇 |
1992年 | 879篇 |
1991年 | 783篇 |
1990年 | 865篇 |
1989年 | 771篇 |
1988年 | 731篇 |
1987年 | 713篇 |
1986年 | 750篇 |
1985年 | 819篇 |
1984年 | 625篇 |
1983年 | 556篇 |
1982年 | 432篇 |
1981年 | 385篇 |
1979年 | 671篇 |
1978年 | 508篇 |
1977年 | 435篇 |
1976年 | 410篇 |
1975年 | 613篇 |
1974年 | 691篇 |
1973年 | 674篇 |
1972年 | 570篇 |
1971年 | 512篇 |
1970年 | 443篇 |
1969年 | 526篇 |
1968年 | 619篇 |
1967年 | 544篇 |
1966年 | 566篇 |
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
911.
T. R. G. Green P. H. Venables L. L. Iversen S. D. Iversen Martin Richards John Morton O. L. Zangwili Mark P. Haggard 《Quarterly journal of experimental psychology (2006)》1970,22(1):68-75
Encyclopaedia of Linguistics, Information and Control. Edited by A. R. Meetham with the assistance of R. A. Hudson. Oxford: Pergamon Press. 1969. Pp. xiv + 718. 300s.
The Biological Basis of Personality. By H. J. Eysenck. Springfield: Thomas. 1968. Pp. xv + 399. $18.50.
Scientific Basis of Dvug Dependence. Biological Council Symposium. Edited by H. Steinberg. London: Churchill. 1969. Pp. 429. 100s.
Minnesota Symposia on Child Psychology, Vol. 2. Edited by John P. Hill. Minneapolis: University of Minnesota Press. 1969. Pp. viii + 172.
Memory and Attention: an introduction to human information processes. By Donald A. Norman. Chichester, Sussex: John Wiley. 1969. Pp. ix + 201. 84s. (cloth); 44s. (paper). Verbal Learning and Memory: selected readings. By Leo Postman and Geoffrey Keppel. Harmondsworth: Penguin Books. 1969. Pp. 501. 12s.
Handbuch der Kinderheilkunde. Edited by H. Opitz and F. Schmidt. Rand VIII/I: Neurologie-Psychologic-Psychiatrie. Redigiert von F. Schmidt und H. Asperger. Berlin: Springer Verlag. Pp. 1060. Price DM385, S96.25.
Digital Computing. By R. S. Lehman and D. E. Bailey. London: John Wiley & Sons Ltd. 1969. Pp. xxiv + 303. 79s.
Real-Time Computers. By W. R. Uttal. New York: Harper & Row. 1968. Pp. xiv + 338. 93s. 相似文献
The Biological Basis of Personality. By H. J. Eysenck. Springfield: Thomas. 1968. Pp. xv + 399. $18.50.
Scientific Basis of Dvug Dependence. Biological Council Symposium. Edited by H. Steinberg. London: Churchill. 1969. Pp. 429. 100s.
Minnesota Symposia on Child Psychology, Vol. 2. Edited by John P. Hill. Minneapolis: University of Minnesota Press. 1969. Pp. viii + 172.
Memory and Attention: an introduction to human information processes. By Donald A. Norman. Chichester, Sussex: John Wiley. 1969. Pp. ix + 201. 84s. (cloth); 44s. (paper). Verbal Learning and Memory: selected readings. By Leo Postman and Geoffrey Keppel. Harmondsworth: Penguin Books. 1969. Pp. 501. 12s.
Handbuch der Kinderheilkunde. Edited by H. Opitz and F. Schmidt. Rand VIII/I: Neurologie-Psychologic-Psychiatrie. Redigiert von F. Schmidt und H. Asperger. Berlin: Springer Verlag. Pp. 1060. Price DM385, S96.25.
Digital Computing. By R. S. Lehman and D. E. Bailey. London: John Wiley & Sons Ltd. 1969. Pp. xxiv + 303. 79s.
Real-Time Computers. By W. R. Uttal. New York: Harper & Row. 1968. Pp. xiv + 338. 93s. 相似文献
912.
G. R. J. Hockey 《Quarterly journal of experimental psychology (2006)》1970,22(1):37-42
It was previously found that noise increased both performance on a primary tracking task and the detection of centrally located signals in a secondary multi-source monitoring task. The present experiment examines the effect of changing the distribution of signals across the monitoring display. When equal numbers are seen at all locations there is no differential effect of noise for central and peripheral locations. Such an effect only occurs when central signals are seen to have greater probability. This result points to the selectivity effect in noise being a function of task priorities and not of physical location. 相似文献
913.
914.
Forgione AG 《Journal of the experimental analysis of behavior》1970,13(1):51-56
Lever holding into shock and short-latency responses to shock onset are two response patterns that interfere with avoidance acquisition in free-operant and discriminated avoidance situations. In an attempt to eliminate these patterns, an additional timer disabled the lever for a period slightly longer than shock duration. A free-operant avoidance schedule with a warning stimulus, but without the additional timer, constituted the control condition. The lever-disabling timer was turned on by different events in two experimental conditions: (a) release of the lever at the onset of shock, (b) shock onset. Interfering responses diminished most rapidly, and efficient avoidance behavior appeared earliest, when the lever-disabling timer was turned on by shock onset. 相似文献
915.
The effect of a fading procedure upon the acquisition of control by an overshadowed auditory feature 下载免费PDF全文
Pigeons' key-pecking responses were reinforced in the presence of a compound stimulus that consisted of an auditory feature (a tone) and a visual feature (a light) and non-reinforced in the presence of a compound stimulus that was either a noise and a dark key, or noise and a light. In the condition where reinforcement trials differed from non-reinforcement trials on the basis of both auditory and visual features, the tone exerted very little control over responding on test. In the condition where reinforcement differed from non-reinforcement trials solely on the basis of the auditory features, an abrupt and a gradual introduction of the visual feature of the negative stimulus, a light, were compared for their effect upon control in the compounds. The tone acquired strong control in both cases. Evidence indicated that the tone had acquired control in the gradual condition without the occurrence of responses to the negative stimulus. An incidental finding was that when the negative stimulus consisted of a noise and a light, which was introduced abruptly, responding over the light dimension with tone, on test, was peaked at a point other than that light value used as positive and negative during training. 相似文献
916.
917.
918.
919.
920.