全文获取类型
收费全文 | 28675篇 |
免费 | 290篇 |
国内免费 | 5篇 |
专业分类
28970篇 |
出版年
2020年 | 95篇 |
2019年 | 107篇 |
2018年 | 3585篇 |
2017年 | 2933篇 |
2016年 | 2401篇 |
2015年 | 323篇 |
2014年 | 215篇 |
2013年 | 940篇 |
2012年 | 844篇 |
2011年 | 2647篇 |
2010年 | 2673篇 |
2009年 | 1688篇 |
2008年 | 1976篇 |
2007年 | 2453篇 |
2006年 | 327篇 |
2005年 | 488篇 |
2004年 | 432篇 |
2003年 | 429篇 |
2002年 | 354篇 |
2001年 | 155篇 |
2000年 | 169篇 |
1999年 | 159篇 |
1998年 | 129篇 |
1997年 | 141篇 |
1996年 | 129篇 |
1995年 | 135篇 |
1994年 | 108篇 |
1993年 | 124篇 |
1992年 | 109篇 |
1991年 | 100篇 |
1990年 | 94篇 |
1989年 | 90篇 |
1988年 | 96篇 |
1987年 | 104篇 |
1986年 | 92篇 |
1985年 | 100篇 |
1984年 | 133篇 |
1983年 | 133篇 |
1982年 | 118篇 |
1981年 | 119篇 |
1980年 | 118篇 |
1979年 | 117篇 |
1978年 | 122篇 |
1977年 | 118篇 |
1976年 | 132篇 |
1975年 | 106篇 |
1974年 | 115篇 |
1973年 | 100篇 |
1972年 | 69篇 |
1968年 | 53篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
91.
Richard D. Wright 《Behavior research methods》1986,18(5):463-465
A method of hardware reaction timing with millisecond accuracy, using one of the Amiga’s CIA 8520 chips, is described. The registers of this chip can be set to enable cascaded timing that functions independently of the CPU and, thereby, avoids the problems of software timing in a multitasking environment. In addition, the interfacing of a pair of reaction-time keys to one of the Amiga’s game controller connectors and a program for polling this port for keypresses are described. 相似文献
92.
Frank D. Lewis William F. Blackerby Janet Rainwater Ross Mark L. Guth Ronald F. Cronkey Melvin J. White Tina Cook 《Behavioral Interventions》1986,1(4):265-274
This study evaluated the relative efficacy of long (1 minute) and short (15 seconds) durations of negative practice for reducing self-stimulatory leg pounding of a traumatically brain-injured adult. In individual social skill training classes, long negative practice and short negative practice were administered concurrently in an alternating treatments design. Generalization of treatment effects outside of training sessions was assessed during the client's lunch period. The results revealed that both durations of negative practice were equally effective in reducing leg pounding during training sessions. However, the effects of training did not generalize to settings in which the practice contingency was not enforced. Pounding was more frequent and negative practice somewhat less effective during periods of high social stimulation. 相似文献
93.
Richard A. Griggs 《Current psychology (New Brunswick, N.J.)》1984,3(4):3-10
The present study examined the hypothesis that violation and role-playing instructions are necessary conditions for facilitation on Wason’s selection task and that facilitation due to memory cueing via thematic content is secondary. The results of a factorial experiment employing these factors did not support the hypothesis. Memory cueing was indicated as the primary factor, but violation instructions did increase the amount of facilitation observed. This interactive effect and the nature of facilitation by memory cueing are briefly discussed. 相似文献
94.
95.
96.
Shelly Cyprus Richard T. Hezel Debbie Rossi Martin R. Adams 《Journal of Fluency Disorders》1984,9(3):191-197
In an investigation of the effects of simulated stuttering on listener recall, a presentation was varied on two factors: degree of stuttering (mild or severe) and information value of stuttered words (low or high). A control presentation featuring non-stuttered speech also was prepared. Five groups of 16 subjects were randomly assigned to, and participated in, one of the five listening conditions. Then they completed a 20-item recall test. A one-way analysis of variance revealed sognificant differences among the five conditions. Two-way analysis of variance disclosed no main effects. However, a significant interaction showed that recall was lowest in the severe stuttering-high information condition. The results are discussed in terms of attention to critical information. 相似文献
97.
The present study explored individual differences in performance of a geometric analogies task. Whereas past studies employed true/false or two-alternative items, the present research included four-alternative items and studied eye movements and confidence judgements for each item performance as well as latency and error. Item difficulty proved to be a function of an interaction between the number of response alternatives and the number of elements in items, especially for subjects lower in fluid-analytic reasoning ability. Results were interpreted using two hypothesized performance strategies: constructive matching and response elimination. The less efficient of these, response elimination, seemed to be used more by lower ability subjects on more difficult items. While two previous theories resemble one or the other of these strategies, neither alone seems to capture the complexity of adaptive problem solving. It appears that a comprehensive theory should incorporate strategy shifting as a function of item difficulty and subject ability.Componential models, based in part on past research, revealed that a justification component was activated and deactivated depending upon the nature of the analogy being solved. In addition, two new components, spatial inference and spatial application, were identified as important on some items, suggesting that different geometric analogy items invoke different cognitive processing components. Thus, a comprehensive theory should also describe component activation and deactivation. 相似文献
98.
The purpose of this study was to clarify contradictory findings concerning the social status of aggressive youngsters. This was undertaken by dividing kindergarten boys into either Aggressive [A] or Aggressive/Withdrawn [A/W] groups, as proposed by Ledingham [1981]. Both groups were found to be high on peer-nominated rejection, but the A group was also high on peer-nominated popularity while the A/W group was low. Similarly, both groups were observed to be high in negative peer interactions, but the A group was also high in positive interactions. It was noted that valuable information regarding the social status and social behavior of aggressive youngsters would be lost if such subgrouping is not undertaken. The relationship between Ledingham's categorizations and others reported in the literature was discussed.This research was supported in part by NIH grant No. 32992 to the first author. 相似文献
99.
Carol E. Ford William E. Pelham Alan O. Ross 《Journal of abnormal child psychology》1984,12(1):127-141
The performance of poor and normal sixth-grade readers was compared on an auditory short-term memory task in two studies. In the first study, the effects of distraction, list length, and speed of stimulus presentation were investigated to test the hypothesis that the performance of the poor readers is affected by deficits in selective attention. Group differences in performance, however, were obtained for both distraction and no-distraction conditions. The second experiment examined the hypothesis that group differences may reflect differences in the use of rehearsal. In the second experiment, half the reading-disabled children and half the controls were provided with rehearsal training prior to completing the same short-term memory task a second time. Rehearsal training resulted in improved performance relative to children who were not trained; however, there was no rehearsal training x reading group interaction. The poor readers continued to show deficits in performance relative to the performance of control children. The results of these two studies suggest that deficits observed for poor readers on short-term memory tasks may reflect processing difficulties in some area that precedes rehearsal and affects performance under both distraction and no-distraction conditions.The authors wish to express their thanks to the Sachem School District and Betty Gould, Nicholas Opinanate, and Guy Barber for their unlimited cooperation, and to John Neale for very helpful discussions of a number of issues in this paper. 相似文献
100.