全文获取类型
收费全文 | 738篇 |
免费 | 181篇 |
国内免费 | 89篇 |
专业分类
1008篇 |
出版年
2024年 | 4篇 |
2023年 | 24篇 |
2022年 | 14篇 |
2021年 | 18篇 |
2020年 | 49篇 |
2019年 | 43篇 |
2018年 | 34篇 |
2017年 | 41篇 |
2016年 | 38篇 |
2015年 | 32篇 |
2014年 | 47篇 |
2013年 | 63篇 |
2012年 | 49篇 |
2011年 | 45篇 |
2010年 | 25篇 |
2009年 | 38篇 |
2008年 | 46篇 |
2007年 | 40篇 |
2006年 | 36篇 |
2005年 | 38篇 |
2004年 | 31篇 |
2003年 | 23篇 |
2002年 | 22篇 |
2001年 | 19篇 |
2000年 | 21篇 |
1999年 | 21篇 |
1998年 | 15篇 |
1997年 | 21篇 |
1996年 | 10篇 |
1995年 | 12篇 |
1994年 | 10篇 |
1993年 | 4篇 |
1992年 | 6篇 |
1991年 | 6篇 |
1990年 | 4篇 |
1989年 | 3篇 |
1988年 | 10篇 |
1987年 | 5篇 |
1986年 | 4篇 |
1985年 | 5篇 |
1984年 | 3篇 |
1983年 | 6篇 |
1981年 | 3篇 |
1980年 | 1篇 |
1979年 | 5篇 |
1978年 | 4篇 |
1977年 | 2篇 |
1976年 | 7篇 |
1975年 | 1篇 |
排序方式: 共有1008条查询结果,搜索用时 7 毫秒
11.
WIlliam V. Gehrlein 《Psychometrika》1990,55(4):695-706
May's model of pairwise preference determination is used to assess the expected likelihood that a subject's pairwise preference comparisons on three alternatives will be transitive. A closed form representation for this expected likelihood is obtained for each situation considered. When the subject is assumed to act precisely according to rankings on attributes with May's model, the computed expected likelihoods the relatively large. When the subject becomes a probabilistic chooser, as defined in a specific manner, expected likelihoods of transitivity decrease significantly from corresponding values with May's model. For a probabilistic Chooser, there is a significant likelihood that the subject might yield transitive pairwise preferences substantially different than the results suggested by May's model.This research was supported by a grant from the General University Research Program and through a fellowship from the Center for Advanced Study, both of the University of Delaware. Very helpful input from John H. Antil, Meryl P. Gardner, and James M. Munch is also acknowledged. 相似文献
12.
Relation algebras from cylindric and polyadic algebras 总被引:1,自引:0,他引:1
13.
14.
Iser G. Deleon Brian A. Iwata Han-Leong GOH April S. Worsdell 《Journal of applied behavior analysis》1997,30(3):439-449
Tustin (1994) recently observed that an individual's preference for one of two concurrently available reinforcers under low schedule requirements (concurrent fixed-ratio [FR] 1) switched to the other reinforcer when the schedule requirements were high (concurrent FR 10). We extended this line of research by examining preference for similar and dissimilar reinforcers (i.e., those affecting the same sensory modality and those affecting different sensory modalities). Two individuals with developmental disabilities were exposed to an arrangement in which pressing two different panels produced two different reinforcers according to progressively increasing, concurrent-ratio schedules. When two dissimilar stimuli were concurrently available (food and a leisure item), no clear preference for one item over the other was observed, regardless of the FR schedules in effect (FR 1, 2, 5, 10, and 20). By contrast, when two similar stimuli were concurrently available (two food items), a clear preference for one item emerged as the schedule requirements were increased from FR 1 to FR 5 or FR 10. These results are discussed in terms of implications for conducting preference assessments and for selecting reinforcers to be used under training conditions in which response requirements are relatively high or effortful. 相似文献
15.
THE EFFECTS OF CHOICE AND TASK PREFERENCE ON THE WORK PERFORMANCE OF ADULTS WITH SEVERE DISABILITIES
Linda M. Bambara Christina Ager Freya Koger 《Journal of applied behavior analysis》1994,27(3):555-556
We evaluated the effects of choice versus the assignment of tasks of varying preferences on the work engagement of adults with severe disabilities. The combined results of two experiments suggest that the relative preference for a task may be an important variable in the effectiveness of choice for some individuals. 相似文献
16.
汉字内隐记忆的实验研究(Ⅱ):任务分离和反应倾向 总被引:9,自引:0,他引:9
在实验I的基础上,操纵学习时的呈现时间(250ms,500ms,750ms)和注意变量(目标和非目标字),运用任务分离方法及间接证明逻辑,比较了再认测验和整字偏好测验在不同条件下的辨别力(A′)和反应倾向(B″)。结果:(1)双向功能分离的出现表明再认测验和偏好测验存在本质差异。根据“过程纯净”假设,可以推证内隐记忆存在于偏好测验中。此时,匹配比较法的标准未满足。(2)偏好测验中,500ms呈现目标字时,有显著正向启动效应:750ms呈现非目标字时,有显著负向启动效应。(3)内隐记忆和外显记忆发生时,都具有稳定的心理状态。但是前者的报告标准较松宽,而后者的较严格。 相似文献
17.
Claude Gratton 《Argumentation》1994,8(3):295-308
This paper discusses some of the ways in which circular definitions and circular explanations entail or fail to entail infinite regresses. And since not all infinite regresses are vicious, a few criteria of viciousness are examined in order to determine when the entailment of a regress refutes a circular definition or a circular explanation.I would like to thank Professors Robert Tully, Howard Sobel, and Derek Allen for their constructive comments. 相似文献
18.
Cathleen C. Piazza Wayne W. Fisher Gregory P. Hanley Kellie Hilker K. Mark Derby 《Journal of applied behavior analysis》1996,29(2):137-152
In the current investigation, a modification was made to the preference assessment described by Pace, Ivancic, Edwards, Iwata, and Page (1985) to predict the effects of stimuli when used in a differential-reinforcement-of-other-behavior (DRO) schedule for 2 clients with severe self-injurious behavior (SIB) and profound mental retardation. Based on the results of the preference assessment, three types of stimuli were identified: (a) high-preference stimuli associated with high rates of SIB (HP/HS), (b) high-preference stimuli associated with relatively lower rates of SIB (HP/LS), and (c) low-preference stimuli associated with low rates of SIB (LP/LS). Consistent with the results of the preference assessment, the DRO schedule with HP/HS stimuli resulted in increased SIB, and the DRO schedule with LP/LS stimuli resulted in no changes in SIB. HP/LS stimuli were demonstrated reinforcers but did not result in a change in SIB when used in a DRO schedule. Thus, the stimulus preference assessment may be useful clinically in some situations for predicting both the beneficial and the negative side effects of stimuli in DRO procedures. 相似文献
19.
Concurrent fixed-interval variable-ratio schedules and the matching relation 总被引:5,自引:5,他引:0 下载免费PDF全文
Rider DP 《Journal of the experimental analysis of behavior》1981,36(3):317-328
Five rats responded under concurrent fixed-interval variable-ratio schedules of food reinforcement. Fixed-interval values ranged from 50-seconds to 300-seconds and variable-ratio values ranged from 30 to 360; a five-second changeover delay was in effect throughout the experiment. The relations between reinforcement ratios obtained from the two schedules and the ratios of responses and time spent on the schedules were described by Baum's (1974) generalized matching equation. All subjects undermatched both response and time ratios to reinforcement ratios, and all subjects displayed systematic bias in favor of the variable-ratio schedules. Response ratios undermatched reinforcement ratios less than did time ratios, but response ratios produced greater bias than did time ratios for every subject and for the group as a whole. Local rates of responding were generally higher on the variable-ratio than on the fixed-interval schedules. When responding was maintained by both schedules, a period of no responding on either schedule immediately after fixed-interval reinforcement typically was followed by high-rate responding on the variable-ratio schedule. At short fixed-interval values, when a changeover to the fixed-interval schedule was made, responding usually continued until fixed-interval reinforcement was obtained; at longer values, a changeover back to the variable-ratio schedule usually occurred when fixed-interval reinforcement was not forthcoming within a few seconds, and responding then alternated between the two schedules every few seconds until fixed-interval reinforcement finally was obtained. 相似文献
20.
A. A. J. Marley 《Psychometrika》1981,46(4):421-428
Various recent works have developed feature or aspect models of similarity and preference. These models are more concerned with the fine detail of the judgment process than were prior models, but nevertheless they have not in general developed an underlying stochastic process compatible with the assumed structure. In this paper, we show that a particular class of multivariate stochastic processes, namely those associated with the Marshall-Olkin multivariate exponential distribution, generates several of these models. In particular, such stochastic processes (appropriately interpreted) yield Tversky's elimination by aspects model, Edgell and Geisler's (normal) additive random aspects model, and Shepard and Arabie's additive cluster model.This work was supported by Natural Science and Engineering Research Council of Canada Grant A8124 to A.A.J. Marley. 相似文献