全文获取类型
收费全文 | 8015篇 |
免费 | 421篇 |
国内免费 | 79篇 |
专业分类
8515篇 |
出版年
2023年 | 77篇 |
2022年 | 50篇 |
2021年 | 62篇 |
2020年 | 119篇 |
2019年 | 122篇 |
2018年 | 172篇 |
2017年 | 164篇 |
2016年 | 112篇 |
2015年 | 73篇 |
2014年 | 76篇 |
2013年 | 275篇 |
2012年 | 71篇 |
2011年 | 258篇 |
2010年 | 67篇 |
2009年 | 100篇 |
2008年 | 83篇 |
2007年 | 94篇 |
2006年 | 125篇 |
2005年 | 81篇 |
2004年 | 86篇 |
2003年 | 46篇 |
2002年 | 101篇 |
2001年 | 104篇 |
2000年 | 70篇 |
1999年 | 63篇 |
1998年 | 39篇 |
1997年 | 22篇 |
1996年 | 37篇 |
1995年 | 17篇 |
1994年 | 8篇 |
1993年 | 12篇 |
1992年 | 24篇 |
1991年 | 12篇 |
1990年 | 15篇 |
1989年 | 16篇 |
1988年 | 10篇 |
1987年 | 13篇 |
1985年 | 454篇 |
1984年 | 557篇 |
1983年 | 449篇 |
1982年 | 543篇 |
1981年 | 501篇 |
1980年 | 521篇 |
1979年 | 464篇 |
1978年 | 496篇 |
1977年 | 380篇 |
1976年 | 374篇 |
1975年 | 314篇 |
1974年 | 312篇 |
1973年 | 260篇 |
排序方式: 共有8515条查询结果,搜索用时 15 毫秒
971.
Delayed matching to complex, two-picture samples (e.g., cat-dog) may be improved when the samples occasion differential verbal behavior. In Experiment 1, individuals with mental retardation matched picture comparisons to identical single-picture samples or to two-picture samples, one of which was identical to a comparison. Accuracy scores were typically high on single-picture trials under both simultaneous and delayed matching conditions. Scores on two-picture trials were also high during the simultaneous condition but were lower during the delay condition. However, scores improved on delayed two-picture trials when each of the sample pictures was named aloud before comparison responding. Experiment 2 replicated these results with preschoolers with typical development and a youth with mental retardation. Sample naming also improved the preschoolers' matching when the samples were pairs of spoken names and the correct comparison picture matched one of the names. Collectively, the participants could produce the verbal behavior that might have improved performance, but typically did not do so unless the procedure required it. The success of the naming intervention recommends it for improving the observing and remembering of multiple elements of complex instructional stimuli. 相似文献
972.
Holden GW 《Clinical child and family psychology review》2003,6(3):151-160
Three definitional issues regarding children exposed to domestic violence are examined. First, the multiple ways in which a child can be exposed to violence is discussed. A taxonomy of 10 types of exposure is proposed. Nine key characteristics of domestic violence, as they relate to children and children's exposure, are then outlined. The third issue addressed concerns why children who are exposed to domestic violence can be considered victims of child maltreatment. These children, by nature of their experience in the home, are psychologically maltreated and are also at high risk for physical abuse and some risk for sexual abuse. Empirical questions concerning these definitions and taxonomies and their interrelations are discussed. 相似文献
973.
This issue of Clinical Child and Family Psychology Review, Children Exposed to Domestic Violence: Current Status and Research Directions, addresses the current status of our knowledge as well as critical research needs in the area of children exposed to domestic violence. Although much has been learned in recent years about children exposed to violence, significant research gaps remain, the identification of which may help to build a more complete and rigorous science base in this area. This journal issue represents the distillation of a 3-day workshop on children exposed to violence, held in July of 2002, that identified what is known about children exposed to violence and what this information tells us about future research directions. Although many federal agencies have supported some research in this area, there is a need for more targeted attention on the topic, particularly with regard to measurement, sampling, and interventions/services. The papers in this issue were selected with these themes in mind. Although no single issue could cover the entire field, we intend to offer a representative sample of where we are and where we need to go with the hope of stimulating additional thought, collaboration, and research in this important area. 相似文献
974.
In this editorial contribution, two issues relevant to the question, what should be at the top of the research agenda for ethics and technology, are identified and discussed. Firstly: can, and do, engineers make a difference to the degree to which technology leads to morally desirable outcomes? What role does professional autonomy play here, and what are its limits? And secondly, what should be the scope of engineers' responsibility; that is to say, on which issues are they, as engineers, morally obliged to reflect? The research agendas proposed by the authors contributing to this special section, implicitly, give different answers to these questions. We suggest that an explicit discussion of these issues would greatly help in constructing a common research agenda. 相似文献
975.
Ton van den Beld 《Ethical Theory and Moral Practice》2001,4(4):383-399
What I set out to do is to cast some doubt on the thesis that, in Bernard Williams's words, any appeal to God in morality either adds nothing at all, or it adds the wrong sort of thing. A first conclusion is that a morality of real, inescapable and (sometimes) for the agent costly obligations, while being at home in a theistic metaphysic, does not sit easily with metaphysical, atheistic naturalism. The second conclusion is that Christine Korsgaard's impressive ethical project which is neutral towards theism and atheism fails in giving a satisfying account of such obligations. My final claim is that a theistic account in terms of a strong divine command theory might succeed where non- and atheistic accounts seem to founder. 相似文献
976.
In this article we describe a child affected by right parieto-occipital lesion due to head injury. The patient showed left hemianopia, but not unilateral spatial neglect on traditional paper-and-pencil tests and on "ecological" tests. However, his parents reported frequent collisions with obstacles on the left side. A specific test was set up: The patient had to kick down skittles put on both sides of a route traced on the floor. He kicked down 89% of skittles on the right, but only 38% on the left side. These findings are discussed in light of recent theories on unilateral neglect. 相似文献
977.
Smith CU 《Brain and cognition》2001,46(3):364-372
J. C. Eccles (1903-1997) had a highly distinguished career in neurophysiology, being awarded the Nobel Prize for Medicine or Physiology in 1963. This paper sets him within the Cartesian tradition of British neurophysiology initiated by Thomas Henry Huxley in the mid-19th century. It shows how the mind-brain problematique of the Cartesian tradition troubled him throughout his career, leading him finally to a solution in terms of quantum microphysics and microphysiology. This position, which has subsequently become fashionable, is discussed and shown (at least in the form Eccles espoused) to provide no solution to the problem posed by Descartes in the early 17th century. 相似文献
978.
GY, an extensively studied human hemianope, is aware of salient visual events in his cortically blind field but does not call this "vision." To learn whether he has low-level conscious visual sensations or whether instead he has gained conscious knowledge about, or access to, visual information that does not produce a conscious phenomenal sensation, we attempted to image process a stimulus s presented to the impaired field so that when the transformed stimulus T(s) was presented to the normal hemifield it would cause a sensation similar to that caused by s in the impaired field. While degradation of contrast, spatio-temporal filtering, contrast reversal, and addition of smear and random blobs all failed to match the response to a flashed bar s(f), moving textures of low contrast were accepted to match the response to a moving contrast-defined bar, s(m). Orientation and motion direction discrimination of the perceptually matched stimuli [s(m) and T(s(m))] was closely similar. We suggest that the existence of a satisfactory match indicates that GY has phenomenal vision. 相似文献
979.
Despite considerable speculation in the research literature regarding the complementarity of functional lateralization of prosodic and linguistic processes in the normal intact brain, few studies have directly addressed this issue. In the present study, behavioral laterality indices of emotional prosodic and traditional linguistic speech functions were obtained for a sample of healthy young adults, using the dichotic listening method. After screening for adequate emotional prosody and linguistic recognition abilities, participants completed the Fused Rhymed Words Test (FRWT; Wexler & Halwes, 1983) and the Dichotic Emotion Recognition Test (DERT; McNeely & Netley, 1998). Examination of the difference in ear asymmetries for these measures within individuals revealed a complementary pattern in 78% of the sample. However, the correlation between laterality quotients for the FRWT and DERT was near zero, supporting Bryden's model of "statistical" complementarity (e.g., Bryden, 1990). 相似文献
980.
Japanese exhibits two different types of morphological processes. Some morphologically complex predicates are generated within the domain of the lexicon, whereas others are generated outside the domain of the lexicon. An elicited production task involving both types of complex predicates was administered to six Japanese children with specific language impairment (JSLI) and six children with normal language development (JNLD). The JSLI children experienced significant difficulty forming the lexicon-external complex predicates but much less difficulty with the lexicon-internal complex predicates while the performance of the JNLD children exhibited no such asymmetry. These preliminary results suggest that the deficit of SLI affects the ability to construct implicit procedural rules for morphology that are generated outside the lexicon while their lexical operations for morphology that are generated within the domain of the lexicon remain relatively unimpaired. 相似文献