全文获取类型
收费全文 | 31537篇 |
免费 | 1129篇 |
国内免费 | 12篇 |
出版年
2019年 | 356篇 |
2018年 | 484篇 |
2017年 | 560篇 |
2016年 | 599篇 |
2015年 | 411篇 |
2014年 | 541篇 |
2013年 | 2736篇 |
2012年 | 934篇 |
2011年 | 969篇 |
2010年 | 653篇 |
2009年 | 621篇 |
2008年 | 872篇 |
2007年 | 836篇 |
2006年 | 780篇 |
2005年 | 702篇 |
2004年 | 705篇 |
2003年 | 652篇 |
2002年 | 758篇 |
2001年 | 831篇 |
2000年 | 850篇 |
1999年 | 695篇 |
1998年 | 405篇 |
1997年 | 346篇 |
1996年 | 324篇 |
1993年 | 319篇 |
1992年 | 567篇 |
1991年 | 515篇 |
1990年 | 540篇 |
1989年 | 507篇 |
1988年 | 476篇 |
1987年 | 476篇 |
1986年 | 490篇 |
1985年 | 515篇 |
1984年 | 456篇 |
1983年 | 428篇 |
1982年 | 362篇 |
1981年 | 369篇 |
1979年 | 519篇 |
1978年 | 401篇 |
1977年 | 373篇 |
1976年 | 330篇 |
1975年 | 454篇 |
1974年 | 491篇 |
1973年 | 430篇 |
1972年 | 403篇 |
1971年 | 343篇 |
1969年 | 381篇 |
1968年 | 409篇 |
1967年 | 372篇 |
1966年 | 385篇 |
排序方式: 共有10000条查询结果,搜索用时 203 毫秒
921.
Being unreasonable: Perelman and the problem of fallacies 总被引:1,自引:0,他引:1
James Crosswhite 《Argumentation》1993,7(4):385-402
Most work on fallacies continues to conceptualize fallacious reasoning as involving a breach of a formal or quasi-formal rule. Chaim Perelman's theory of argumentation provides a way to conceptualize fallacies in a completely different way. His approach depends on an understanding of standards of rationality as essentially connected with conceptions of universality. Such an approach allows one to get beyond some of the basic problems of fallacy theory, and turns informal logic toward substantive philosophical questions. I show this by reinterpreting three so-called fallacies - theargumentum ad baculum, equivocation and composition/division - in the light of Perelman's account. 相似文献
922.
The purpose of this paper is twofold. First, it provides an historical overview of studies of risk, risk perception, and decision making under risk within the genetic counseling domain. Second, it proposes an alternative conceptualization and operationalization for the study of risk perception. The conceptualization involves probability, adversity, incompleteness, and ambiguity. Prior studies of risk perception focus on the recurrence risk and operationalize risk perception by asking for interpretations of the magnitude of the probability of the outcome. Their focus is on the probability of a particular outcome. We formulate the problem in terms of a gamble and suggest that risk perception be operationalized in terms of the riskiness of the gamble. Our focus is on the riskiness of a decision option which entails two or more outcomes. 相似文献
923.
924.
925.
926.
The crane's foot: The rise of the pedigree in human genetics 总被引:1,自引:1,他引:0
Robert G. Resta 《Journal of genetic counseling》1993,2(4):235-260
The standard pedigree used by geneticists is intimately connected to the history of genetics. Pedigrees drawn today are based on standards established in the early decades of the twentieth century. Those standards were established by geneticists who pursued an active interest in eugenics. The slightly different standards followed in America vs. England to some extent followed the stronger support of Mendelism by the Americans, as well as the individual preferences of the leading human geneticists in those countries. 相似文献
927.
Matthew G. Hile Donna M. Campbell Bagher B. Ghobary Marcie N. Desrochers 《Behavior research methods》1993,25(2):195-198
The development of expert and decision support systems requires the collection, organization, codification, and storage of a body of specialized knowledge. The development, using reconstructive methods, of two such knowledge bases, the first containing the current scientific literature and the second containing an expert’s knowledge, is described for an automated decision support system, the Mental Retardation-Expert. This system provides practitioners with assistance in the treatment of aggressive, self-injurious, and destructive behaviors displayed by individuals with mental retardation or developmental disabilities. The average interobserver reliability of the expert knowledge base ranged from 92.5% to 95.0% when calculated across four clinicians’ assessments of 31 abstracted cases. 相似文献
928.
James M. Kieley 《Behavior research methods》1993,25(2):287-294
Wide-area computer networks provide a wealth of information services that have the potential to alter the approach toward scholarship taken by both students and researchers. Although it can be argued that the translation of information from hard copy to a publicly accessible electronic form has developed slowly, the total volume of text-based information that has been digitized is already staggering. Two major challenges facing psychologists wishing to develop their skills in network use are to identify and locate pertinent information that is accessible, and to find an easy way to retrieve it. This paper is an attempt to provide an overview of network resources and services that may be of particular interest to psychologists and psychology students. Its focus is on how to learn more about the available information services, as well as how to make access as user friendly as possible. 相似文献
929.
Commercial database programs such as dBase and Paradox, although developed originally for business applications, are versatile and powerful tools that can be used for an academic purpose such as evaluating student performance. They can be used to write and store test questions, assemble and print classroom or on-line laboratory tests, and calculate grades, test statistics, and so forth. Databases are flexible, unlike textbook “ancillary” test bank programs that are inextricably bound to the strictly linear format and brief shelf life of specific textbook editions. A prototypical relational database program is described, with which an instructor can produce tests based on generic terms adapted from Boneau’s (1990) study of psychological literacy, as well as on behavioral learning objectives adapted from Bloom’s (1956) taxonomy of educational objectives. As a relational database, the program integrates terms, objectives, questions, tests, and test scores, and avoids unnecessary data duplication and waste of computer storage space. 相似文献
930.
Checkerboards contain fundamental two-dimensional Fourier components oriented 45° from the edges of individual checks. Previous studies have shown that contingent color aftereffects following adaptation to chromatic checkerboard stimuli were associated with the fundamental components rather than the edges, In the present experiments, we measured contingent color aftereffects, using the method of constant stimuli, after subjects adapted to unfiltered checkerboards and checkerboards with the fundamental Fourier components removed. The adaptation stimuli were magenta (or green) squares and green (or magenta) diamonds; the test stimuli were vertical or oblique sine-wave gratings with different saturations, After adaptation to unfiltered checkerboards, aftereffects contingent on the fundamental components were obtained. In contrast, after adaptation to filtered stimuli, aftereffects of smaller magnitude were found to be aligned with the edges. The data support the previous findings of spatial-frequency-contingent color after-effects with checkerboard adaptation stimuli and indicate that the aftereffects can be associated with edges if the fundamental components of adaptation stimuli are removed by spatial filtering. We reexamined the possibility of color aftereffects induced by imagery of checkerboards. Contrary to the previous reports, no significant aftereffects were obtained. 相似文献