全文获取类型
收费全文 | 1142篇 |
免费 | 73篇 |
国内免费 | 2篇 |
出版年
2022年 | 12篇 |
2021年 | 14篇 |
2020年 | 22篇 |
2019年 | 37篇 |
2018年 | 36篇 |
2017年 | 42篇 |
2016年 | 50篇 |
2015年 | 25篇 |
2014年 | 40篇 |
2013年 | 108篇 |
2012年 | 44篇 |
2011年 | 48篇 |
2010年 | 31篇 |
2009年 | 37篇 |
2008年 | 49篇 |
2007年 | 36篇 |
2006年 | 36篇 |
2005年 | 31篇 |
2004年 | 36篇 |
2003年 | 33篇 |
2002年 | 27篇 |
2001年 | 25篇 |
2000年 | 21篇 |
1999年 | 15篇 |
1998年 | 22篇 |
1997年 | 15篇 |
1996年 | 15篇 |
1995年 | 8篇 |
1994年 | 7篇 |
1993年 | 13篇 |
1992年 | 18篇 |
1991年 | 15篇 |
1990年 | 11篇 |
1989年 | 8篇 |
1988年 | 15篇 |
1987年 | 9篇 |
1986年 | 15篇 |
1985年 | 14篇 |
1984年 | 15篇 |
1983年 | 8篇 |
1982年 | 11篇 |
1979年 | 9篇 |
1977年 | 8篇 |
1975年 | 8篇 |
1974年 | 10篇 |
1973年 | 9篇 |
1972年 | 6篇 |
1969年 | 11篇 |
1968年 | 6篇 |
1967年 | 7篇 |
排序方式: 共有1217条查询结果,搜索用时 15 毫秒
1.
2.
3.
Fixed-ratio pausing: Joint effects of past reinforcer magnitude and stimuli correlated with upcoming magnitude 总被引:8,自引:8,他引:0
下载免费PDF全文
![点击此处可从《Journal of the experimental analysis of behavior》网站下载免费的PDF全文](/ch/ext_images/free.gif)
Pigeons responded on fixed-ratio schedules ending in small or large reinforcers (grain presentations of different duration) interspersed within each session. In mixed-schedule conditions, the response key was lit with a single color throughout the session, and pausing was directly related to the past reinforcer (longer pauses after large reinforcers than after small ones). In multiple-schedule conditions, different colors accompanied the ratios ending in small and large reinforcers, and pausing was affected by the upcoming reinforcer as well as the past one. Pauses were shorter before large reinforcers than before small ones, but they continued to be longer after large reinforcers than after small ones. The influence of the past reinforcer was modulated by the magnitude of the upcoming reinforcer; in the presence of the stimulus before the small reinforcer, the effect of the past reinforcer was enhanced relative to its effect in the stimulus before the large reinforcer. These results show that pausing between ratios is jointly determined by two competing factors: past conditions of reinforcement and stimuli correlated with upcoming conditions. 相似文献
4.
We introduce two new belief revision axioms: partial monotonicity and consequence correctness. We show that partial monotonicity is consistent with but independent of the full set of axioms for a Gärdenfors belief revision sytem. In contrast to the Gärdenfors inconsistency results for certain monotonicity principles, we use partial monotonicity to inform a consistent formalization of the Ramsey test within a belief revision system extended by a conditional operator. We take this to be a technical dissolution of the well-known Gärdenfors dilemma.In addition, we present the consequential correctness axiom as a new measure of minimal revision in terms of the deductive core of a proposition whose support we wish to excise. We survey several syntactic and semantic belief revision systems and evaluate them according to both the Gärdenfors axioms and our new axioms. Furthermore, our algebraic characterization of semantic revision systems provides a useful technical device for analysis and comparison, which we illustrate with several new proofs.Finally, we have a new inconsistency result, which is dual to the Gärdenfors inconsistency results. Any elementary belief revision system that is consequentially correct must violate the Gärdenfors axiom of strong boundedness (K*8), which we characterize as yet another monotonicity condition.This work was supported by the McDonnell Douglas Independent Research and Development program. 相似文献
5.
6.
Digressions in argumentative discussion are a kind of failure of relevance. Examination of what actual cases look like reveals several properties of argumentative relevance: (1) The informational relevance of propositions to the truth value of a conclusion should be distinguished from the pragmatic relevance of argumentative acts to the task of resolving a disagreement. (2) Pragmatic irrelevance is a collaborative phenomenon. It does not just short-circuit reasoning; it encourages a failure to take up the demands of an argumentative task. (3) Pragmatic irrelevance can occur not simply by the absence of a connection between what is said and some standpoint in dispute, but also by the presence of a connection between what is said and a competing use of the information. (4) Pragmatic relevance must be accomplished through communicative action. 相似文献
7.
8.
In response to the article by Lamiell and Trierweiler (this issue), we examine the stated epistemological origins of idiothetic proposals for theory and research in personality We argue that the justification for those proposals as advanced by Lamiell and his colleagues is wholely insufficient in view of prior research on the consistency of behavior This assertion together with our identification of problems in scaling personality and personality consistencies lead us to conclude that the pursuit of the idiothetic method is both unwarranted and ineffectual 相似文献
9.
10.
Recent studies have demonstrated that positive verbal feedback enhances males' intrinsic motivation for a task, while decreasing that of females. This result has been attributed to differential socialization forces which make the controlling aspects of rewards more salient for females as opposed to males, for whom the informational aspects are prepotent. A weakness in this conclusion stems from the use of a masculine sex-linked task in prior experiments, producing a result which may be due to gender congruence/incongruence rather than to socialization differences. Two laboratory experiments were performed to examine the effects of verbal praise on intrinsic motivation, controlling for sex-typing of the experimental activity. Experiment I found that verbal praise increased females' and males' intrinsic motivation on both a feminine and masculine task, and intrinsic motivation was higher for sex-appropriate than sex-inappropriate tasks. The sexes did not show a differential pattern of response to praise. In Experiment 2, verbal praise also enhanced sex-role traditional females' intrinsic motivation on the same activity used in prior research. These results suggest that socialization content has changed sufficiently to make concerns about competence and self-determination equally salient for females and males. 相似文献