全文获取类型
收费全文 | 7161篇 |
免费 | 314篇 |
国内免费 | 3篇 |
专业分类
7478篇 |
出版年
2021年 | 60篇 |
2020年 | 103篇 |
2019年 | 110篇 |
2018年 | 132篇 |
2017年 | 132篇 |
2016年 | 145篇 |
2015年 | 115篇 |
2014年 | 143篇 |
2013年 | 780篇 |
2012年 | 219篇 |
2011年 | 267篇 |
2010年 | 167篇 |
2009年 | 186篇 |
2008年 | 214篇 |
2007年 | 244篇 |
2006年 | 201篇 |
2005年 | 200篇 |
2004年 | 206篇 |
2003年 | 203篇 |
2002年 | 225篇 |
2001年 | 113篇 |
2000年 | 100篇 |
1999年 | 101篇 |
1998年 | 124篇 |
1997年 | 127篇 |
1996年 | 110篇 |
1995年 | 100篇 |
1994年 | 96篇 |
1993年 | 118篇 |
1992年 | 112篇 |
1991年 | 81篇 |
1990年 | 86篇 |
1989年 | 88篇 |
1988年 | 79篇 |
1987年 | 92篇 |
1986年 | 72篇 |
1985年 | 75篇 |
1984年 | 99篇 |
1983年 | 93篇 |
1982年 | 105篇 |
1981年 | 96篇 |
1980年 | 98篇 |
1979年 | 95篇 |
1978年 | 111篇 |
1977年 | 108篇 |
1976年 | 96篇 |
1975年 | 109篇 |
1974年 | 93篇 |
1973年 | 70篇 |
1971年 | 60篇 |
排序方式: 共有7478条查询结果,搜索用时 7 毫秒
101.
William R. Uttal 《Attention, perception & psychophysics》1970,7(3):133-136
We present the result of two experiments that demonstrate an ability on the part of Os to detect asynchronies in visual stimuli with in the range of 0-100 msec. Such results are additional examples of an ability on the part of the human O to use information about temporal order to a precision beyond the usual results of visual “simultaneity” experiments. Thus the conventional nations of simultaneity and its corollary, the psychological moment, may be reflections of psychophysical technique rather than the biological function of sensory systems. 相似文献
102.
M. B. Sterman J. J. Lynch M. T. Orne D. Paskewitz J. Costello N. Nicolov O. Diankov M. Popova E. Tsvetanska Robert G. Grenell J. J. Izquierdo V. H. Mark Joseph Germana N. Zill William P. Paré Joseph E. O. Newton George C. Offutt Walter Ehrlich Joseph E. D. Newton Julij Tosef J. Perez-Cruet Chester R. Wilpizeski John F. Lontz Andrew Livingston Joseph W. Cullen Samuel A. Corson Herman R. Weed Elizabeth O. Corson O. D. Murphree Paul N. Morgan Ruth Jarman J. Antal T. A. Ban J. V. Ananth H. E. Lehmann A. Ulric Moore Richard H. Barnes Wilson G. Pond 《Integrative psychological & behavioral science》1970,5(3):185-193
103.
An automated “intelligence” test for rats is described. Supporting data indicate that this maze-problem series is sensitive to hypothyroidism-induced learning deficit and sex differences. Comparisons between this new problem set and the Rabinovitch-Rosvold (1951) closed-field tests are presented with respect to difficulty, internal consistency, and test-retest reliability. 相似文献
104.
Ten Ss served in this experiment, five right-handed and five left-handed. Every S was tested in a perceived-order situation and by the up-and-down method to determine the relative on-latency for a visual test stimulus. i.e, (ON-Lat for lest stimulus involving right hemisphere- ON-Lat for standard stimulus involving left hemisphere) and to determine a similarly defined relative off-latency for the same test stimulus. The algebraic difference between the relative on-latency measure and the relative off-latency measure was then found. Data from a previous study had suggested that this “on-off difference” was characteristically positive for left-handed Ss and negative for right-handed Ss. The present data agree. The left-handed Ss were found to differ significantly from the right-handed Ss in the magnitude of the on-off difference. This outcome appears important as a possible clue to functional interhemispheric differences related to handedness. 相似文献
105.
The relationship between attitudes toward the Vietnam war and willingness to sign a strongly worded and publicized antiwar resolution was studied in a random sample of 131 male college seniors at a selective liberal arts college. Level of opposition to the war did not fully explain why many strongly antiwar subjects did not sign the resolution. With level of opposition to the war held constant, personality measures and other attitudes differentiated between signers and nonsigners It is hypothesized that the disposition to act publicly in support of private attitudes is a separate variable, which may be independent of the content and intensity of attitudes Studies of “activism” should distinguish more sharply between private attitudes and public actions. 相似文献
106.
The efficacy of immediate tangible reinforcement in increasing appropriate visual attending for entire classes of deaf children was examined. The subjects were three classes (seven children each) in a residential school for the deaf. Boxes were installed on each child's desk, with lights that were flashed immediately contingent upon 10 sec of visual attending. Light flashes were backed up by M & M's, cereal bits, or tokens. In two of the classes, extinction sessions were also scheduled. For all classes, the reinforcement procedure increased visual attending by 50% or more, maintaining it at rates above 82%. Withdrawal of tangibles decreased attending back to baseline levels. The results support analysis of attending as operant behavior and demonstrate the applicability of reinforcement procedures in modifying these behaviors for young deaf children in a classroom setting. 相似文献
107.
108.
109.
110.