全文获取类型
收费全文 | 157157篇 |
免费 | 7323篇 |
国内免费 | 155篇 |
出版年
2021年 | 1474篇 |
2020年 | 2751篇 |
2019年 | 3409篇 |
2018年 | 3311篇 |
2017年 | 3765篇 |
2016年 | 4467篇 |
2015年 | 3891篇 |
2014年 | 4768篇 |
2013年 | 23328篇 |
2012年 | 4008篇 |
2011年 | 2934篇 |
2010年 | 3622篇 |
2009年 | 4623篇 |
2008年 | 3272篇 |
2007年 | 2770篇 |
2006年 | 3538篇 |
2005年 | 3555篇 |
2004年 | 3085篇 |
2003年 | 2728篇 |
2002年 | 2509篇 |
2001年 | 2566篇 |
2000年 | 2449篇 |
1999年 | 2686篇 |
1998年 | 2752篇 |
1997年 | 2604篇 |
1996年 | 2529篇 |
1995年 | 2361篇 |
1994年 | 2332篇 |
1993年 | 2284篇 |
1992年 | 2219篇 |
1991年 | 2077篇 |
1990年 | 1932篇 |
1989年 | 1880篇 |
1988年 | 1841篇 |
1987年 | 1898篇 |
1986年 | 1876篇 |
1985年 | 2094篇 |
1984年 | 2304篇 |
1983年 | 2125篇 |
1982年 | 2292篇 |
1981年 | 2268篇 |
1980年 | 2114篇 |
1979年 | 1922篇 |
1978年 | 2031篇 |
1977年 | 2036篇 |
1976年 | 1816篇 |
1975年 | 1771篇 |
1974年 | 1789篇 |
1973年 | 1634篇 |
1972年 | 1266篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
981.
Parent-tutoring procedures: Experimental analysis and validation of generalization in oral reading across passages,settings, and time 总被引:1,自引:0,他引:1
Steven F. Duvall Ph.D. Joseph C. Delquadri Ph.D. Marlene Elliott Ph.D. R. Vance Hall Ph.D. 《Journal of Behavioral Education》1992,2(3):281-303
A study that involved parents as reading tutors was carried out at home during the summer with four elementary children, three with learning disabilities. One purpose was to determine the effects of tutoring in the basal reader on reading rates at home. Another purpose was to determine potential generalization effects as a result of parent tutoring on different academic tasks at home and, later at school, on different and similar tasks. A combination multiple-baseline and reversal design tested for replication and generalization effects. Increases in correct rates were noted for the targeted variables across conditions. The results indicated that parents tutoring with school basal texts during the summer produced marked increases in reading rates that generalized at home to different academic tasks and at school to different and similar tasks. This suggests that parents, when using specific tutoring procedures, can increase their children's academic skills. 相似文献
982.
The field of applied behavior analysis has devoted considerable effort to the problem of educating America's youth. In addition to developing a wide range of procedures to improve children's academic and classroom survival skills, behavioral researchers have discussed a wide range of technological characteristics that are likely to facilitate the adoption of their procedures by educational decision-makers and practitioners. A movement to restructure American schools has become highly popularized within educational, political, and public media forums over the past several years. One general characteristic of this movement is its failure to recommend the more frequent implementation of applied behavior analysis techniques to educate America's youth. A close inspection of three global models for school reform, however, reveals notable compatibilities with the focus and goals of applied behavior analysis. Applied behavior analysts can collaborate with and contribute to the school restructuring movement by pursuing the more formal and systematic analyses of characteristics essential to the adoption process. 相似文献
983.
984.
Arthur L. Caplan 《Theoretical medicine and bioethics》1992,13(1):67-77
There has been a great deal of discussion, in this journal and others, about obstacles hindering the evolution of the philosophy of medicine. Such discussions presuppose that there is widespread agreement about what it is that constitutes the philosophy of medicine.Despite the fact that there is, and has been for decades, a great deal of literature, teaching and professional activity carried out explicitly in the name of the philosophy of medicine, this is not enough to establish that consensus exists as to the definition of the field. And even if consensus can be obtained as to what constitutes the philosophy of medicine, this does not mean that it exists as a field. 相似文献
985.
David J. Doukas 《Theoretical medicine and bioethics》1992,13(1):5-14
The emergence of the ethics consultation as a means to resolve moral crises in clinical medicine has revealed the need for a worksheet that would facilitate intake and analysis. The author developed the Bioethics Consultation Form as an attempt to remedy this need. The form is arranged in an outline format and is a useful asset to ethics committee discussions and record keeping. The first section covers basic intake data concerning the patient's medical and personal information, advance directives, and values, as well as the values of the physician and family. After the intake section is completed with the above data, the ethics consultant then turns to the analysis section. This second section allows for (1) the discussion of conflicting values, (2) the identification of priorities, and (3) the elucidation of ethical norms relevant to the case.The Bioethics Consultation Form was adopted by the Patient Care Advisory committee of the Franklin Square Hospital Center in Baltimore, Maryland in 1986. The methodology in the use of the form will be discussed. Further, the potential spectrum of consultative cases that can be analyzed using the form will be highlighted. 相似文献
986.
Kenneth F. Schaffner 《Theoretical medicine and bioethics》1992,13(2):191-216
This two-part article examines the competition between the clonal selection theory and the instructive theory of the immune response from 1957–1967. In Part I the concept of a temporally extended theory is introduced, which requires attention to the hitherto largely ignored issue of theory individuation. Factors which influence the acceptability of such an extended theory at different temporal points are also embedded in a Bayesian framework, which is shown to provide a rational account of belief change in science. In Part II these factors, as elaborated in the Bayesian framework, are applied to the case of the success of the clonal selection theory and the failure of the instructive theory. 相似文献
987.
Virginia A. Sharpe 《Theoretical medicine and bioethics》1992,13(4):295-318
Carol Gilligan has identified two orientations to moral understanding; the dominant ‘justice orientation’ and the under-valued ‘care orientation’. Based on her discernment of a ‘voice of care’, Gilligan challenges the adequacy of a deontological liberal framework for moral development and moral theory. This paper examines how the orientations of justice and care are played out in medical ethical theory. Specifically, I question whether the medical moral domain is adequately described by the norms of impartiality, universality, and equality that characterize the liberal ideal. My analysis of justice-oriented medical ethics, focuses on the libertarian theory of H.T. Engelhardt and the contractarian theory of R.M. Veatch. I suggest that in the work of E.D. Pellegrino and D.C. Thomasma we find not only a more authentic representation of medical morality but also a project that is compatible with the care orientation's emphasis on human need and responsiveness to particular others. 相似文献
988.
M. Wayne Cooper 《Theoretical medicine and bioethics》1992,13(4):349-361
Because physicians use scientific inference for the generalizations of individual observations and the application of general knowledge to particular situations, the Bayesian probability solution to the problem of induction has been proposed and frequently utilized. Several problems with the Bayesian approach are introduced and discussed. These include: subjectivity, the favoring of a weak hypothesis, the problem of the false hypothesis, the old evidence/new theory problem and the observation that physicians are not currently Bayesians. To the complaint that the prior probability is subjective, Bayesians reply that there will be ultimate convergence, but the rebuttal to this is that there will not be uniform convergence. Secondly, since the Bayesian scheme favors a weak hypothesis, theories turn out to be a gratuitous risk. The problem with the false hypothesis comes out in the denominator of the theorem, revealing that a factor which is not a theory at all is being considered in the reasoning. On the old evidence/new theory problem old evidence cannot confirm a new theory so that the posterior probability will equal the prior probability. Finally, empiric studies have shown that current physicians are not Bayesians. But on consideration of Bayesian inference as a system of inference, it can be reasoned that physicians should be Bayesians. However, the problem of physicians' and patients' own subjectivity continue to plague this system of medical decision making. 相似文献
989.
K. Alison Clarke-Stewart 《Infant and child development》1992,1(1):5-14
Twenty years ago, William Kessen, Greta Fein and I developed and tested a model of parent education, a model which involved variation in curricular content, didactic approaches, and child outcomes–experimentally contrasted. Our experience yielded some valuable lessons about the extent to which researchers can influence parents' behaviour, and parents their children's development. In the present article I suggest that these lessons might be useful for researchers now as they were for us then. I present some observations about the research that developmental psychologists have done in the intervening two decades and suggest that we could learn much by using such a model of parent education to answer questions about the effets of parents' behaviour on children's development. Carefully done, parent education studies can yield valuable information about many of the questions raised in recent correlational research. Parent training research can suggest hypotheses that can be tested with data collected non-interventively and analysed in causal model analyses–and vice versa. What is more, because one reason for studying parent effects is so that we can offer guidance to parents about rearing their children, this design has a particular advantage; it is both the medium and the message. 相似文献
990.
The twisted helix: An essay on genetic counselors,eugenics, and social responsibility 总被引:2,自引:0,他引:2
Resta RG 《Journal of genetic counseling》1992,1(3):227-243
The American eugenics movement had a significant impact on American social history, and analysis of the movement illustrates the relationship among science, scientists, and society. The history of the American eugenics movement as well as more recent examples of eugenic thought and biological determinism are reviewed. The need for genetic counselors to confront eugenic issues in their own profession and in society is discussed. 相似文献