首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   7534篇
  免费   273篇
  国内免费   4篇
  7811篇
  2021年   59篇
  2020年   93篇
  2019年   132篇
  2018年   165篇
  2017年   185篇
  2016年   189篇
  2015年   140篇
  2014年   187篇
  2013年   879篇
  2012年   309篇
  2011年   326篇
  2010年   188篇
  2009年   200篇
  2008年   279篇
  2007年   284篇
  2006年   263篇
  2005年   225篇
  2004年   227篇
  2003年   227篇
  2002年   209篇
  2001年   116篇
  2000年   101篇
  1999年   123篇
  1998年   91篇
  1997年   86篇
  1996年   76篇
  1995年   74篇
  1994年   82篇
  1993年   96篇
  1992年   72篇
  1991年   83篇
  1990年   81篇
  1989年   55篇
  1988年   74篇
  1987年   73篇
  1986年   75篇
  1985年   82篇
  1984年   101篇
  1983年   83篇
  1982年   90篇
  1981年   88篇
  1980年   76篇
  1979年   77篇
  1978年   77篇
  1977年   84篇
  1976年   87篇
  1975年   89篇
  1974年   90篇
  1973年   81篇
  1972年   52篇
排序方式: 共有7811条查询结果,搜索用时 0 毫秒
981.
Abstract

Sport scientists have started to amass a small body of knowledge on loss in sport. Viewing sport retirement from a loss framework is particularly appropriate when examining transitions out of disability sport because athletes with disabilities are at risk for facing unique losses when they lease sport (Martin, 1996; Wheeler, Malone, & Steadward, 1996). The purpose of this article is to discuss loss experiences in disability sport from psychological, social, and physiological perspectives.  相似文献   
982.
Abstract

Thirty-two patients with panic disorder, with or without agoraphobic limitations, were treated with alprazolam (mean dose 3.5 mg/d) plus brief behavioral guidance in an open study during eight weeks. The sample had a notorious severity in the frequency of panics and phobic avoidance but was only mildly depressed. Before starting treatment the presence of demoralized mood and extensive avoidance were significant indicators of clinical severity, whereas the presence of dizziness as a relevant somatic complaint was not related to higher severity. After eight weeks of treatment a clinical improvement equal to or exceeding 80% of change was obtained in all cases (29) who completed treatment. Ninety-two percent of the patients were panic free at the end of treatment. There were significant reductions in all the scales with comparable declines in the subgroups formed according to the presence or absence of agoraphobic avoidance and demoralization. The data suggested that moderate doses of alprazolam could be a quick and effective treatment for panic-agoraphobic patients in the short term. The behavioral guidance probably helped in reducing agoraphobic avoidance and in obtaining global good effectiveness although this awaits controlled tests. Finally, the similarity in the response to treatment regardless of the presence of extensive avoidance or demoralized mood argues in favor of not considering the different variants of panic-agoraphobic syndrome differently, at least in samples with similar severity to the present one.  相似文献   
983.
This article reviews judicial attitudes with regard to the constitutionality of aid for children in religiously affiliated non-public schools. The first part highlights the extent to which the Supreme Court appears to have turned the corner in its willingness to examine the effective use of resources in regular education rather than just the acceptability of aid. The second section reviews how Congressional and regulatory activities have contributed to lower court decisions that continue to focus on the narrow issues of how much money can be spent and the appropriate locations for the delivery of services to children who attend religiously affiliated non-public schools rather than the quality of education that they may be eligible to receive. Given the distinctions between the ways in which children in religiously affiliated non-public schools are treated based on whether they have disabilities, this article examines recent legal trends in considering whether there will be a new era in providing children who attend religiously affiliated non-public schools with the state aid that they deserve.  相似文献   
984.
Olfactory experiences represent a domain that is particularly rich in crossmodal associations. Whereas associations between odors and tastes, or other properties of their typical sources such as color or temperature, can be straightforwardly explained by associative learning, other matchings are much harder to explain in these terms, yet surprisingly are shared across individuals: The majority of people, for instance, associate certain odors and auditory features, such as pitch (Belkin, Martin, Kemp, & Gilbert, Psychological Science 8:340–342, 1997; Crisinel & Spence, Chemical Senses 37:151–158, 2012b) or geometrical shapes (Hanson-Vaux, Crisinel, & Spence, Chemical Senses 38:161–166, 2013; Seo, Arshamian, et al., Neuroscience Letters 478:175–178, 2010). If certain odors might indeed have been encountered while listening to certain pieces of music or seeing certain geometrical shapes, these encounters are very unlikely to have been statistically more relevant than others; for this reason, associative learning from regular exposure is ruled out, and thus alternative explanations in terms of metaphorical mappings are usually defended. Here we argue that these associations are not primarily conceptual or linguistic, but are grounded in structural perceptual or neurological determinants. These cases of crossmodal correspondences established between contingent environmental features can be explained as amodal, indirect, and transitive mappings across modalities. Surprising associations between odors and contingent sensory features can be investigated as genuine cases of crossmodal correspondences, akin to other widespread cases of functional correspondences that hold, for instance, between auditory and visual features, and can help reveal the structural determinants weighing on the acquisition of these crossmodal associations.  相似文献   
985.
A method to facilitate exploratory or discovery-oriented psychotherapy process research is presented. The personal and professional contexts out of which the need for this new approach to psychotherapy process research arose are described. Several changes in scientific values and beliefs that have occurred as a consequence of the development and use of this methodology are noted.  相似文献   
986.
The primary treatment for individuals who have encountered violence and/or abuse is trauma-focused cognitive and behavioral modalities. However, these therapeutic approaches are not always effective for youth who have encountered this type of trauma. Trauma is often communicated through the body via physical ailments, particularly when words are insufficient to capture an individual’s experience or when adequate processing of the trauma is not possible due to profound stress. Dance offers an alternative form of therapy that can address “where” the trauma is held, relieve tension, and restore a sense of ownership with one’s body and mind. In this article, we discuss the development of Sole Expression, a trauma-informed hip-hop dance program for youth who have experienced abuse and/or exposure to violence. We provide an overview of establishing the team, securing funding, trauma training, program curriculum, and the related research. We conclude with recommendations for best practices that benefit both practitioners and the young people served.  相似文献   
987.
The functional role of correlations between neuronal spike trains remains strongly debated. This debate partly stems from the lack of a standardized analysis technique capable of accurately quantifying the role of correlations in stimulus encoding. We believe that information theoretic measures may represent an objective method for analysing the functional role of neuronal correlations. Here we show that information analysis of pairs of spike trains allows the information content present in the firing rate to be disambiguated from any extra information that may be present in the temporal relationships of the two spike trains. We validate and illustrate the method by applying it to simulated data with variable degrees of known synchrony, and by applying it to recordings from pairs of sites in the primary visual cortex of anaesthetized cats. We discuss the importance of information theoretic analysis in elucidating the neuronal mechanisms underlying object identification.  相似文献   
988.
This study investigated cognitive interactions between visuo-motor processing and numerical cognition. In a pointing task healthy participants moved their hand to a left or right target, depending on the parity of small or large digits (1, 2, 8, or 9) shown at central fixation. Movement execution was faster when left-responses were made to small digits and right-responses to large digits. These results extend the SNARC effect (spatial-numerical association of response codes) to manual pointing and support the notion of a spatially oriented mental number line.  相似文献   
989.
Context traditionally has been regarded in vision research as a determinant for the interpretation of sensory information on the basis of previously acquired knowledge. Here we propose a novel, complementary perspective by showing that context also specifically affects visual category learning. In two experiments involving sets of Compound Gabor patterns we explored how context, as given by the stimulus set to be learned, affects the internal representation of pattern categories. In Experiment 1, we changed the (local) context of the individual signal classes by changing the configuration of the learning set. In Experiment 2, we varied the (global) context of a fixed class configuration by changing the degree of signal accentuation. Generalization performance was assessed in terms of the ability to recognize contrast-inverted versions of the learning patterns. Both contextual variations yielded distinct effects on learning and generalization thus indicating a change in internal category representation. Computer simulations suggest that the latter is related to changes in the set of attributes underlying the production rules of the categories. The implications of these findings for phenomena of contrast (in)variance in visual perception are discussed.  相似文献   
990.
Previous studies have shown that spatial attention can be “captured” by irrelevant events, but only if the eliciting stimulus matches top-down attentional control settings. Here we explore whether similar principles hold for nonspatial attentional selection. Subjects searched for a coloured target letter embedded in an RSVP stream of letters inside a box centred on fixation. On critical trials, a distractor, consisting of a brief change in the colour of the box, occurred at various temporal lags prior to the target. In Experiment 1, the distractor produced a decrement in target detection, but only when it matched the target colour. Experiments 2 and 3 provide evidence that this effect does not reflect masking or the dispersion of spatial attention. The results establish that (1) nonspatial selection is subject to “capture”, (2) such capture is contingent on top-down attentional control settings, and (3) control settings for nonspatial capture can vary in specificity.  相似文献   
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号