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   818篇
  免费   71篇
  国内免费   101篇
  990篇
  2024年   1篇
  2023年   19篇
  2022年   17篇
  2021年   35篇
  2020年   37篇
  2019年   34篇
  2018年   34篇
  2017年   34篇
  2016年   43篇
  2015年   39篇
  2014年   35篇
  2013年   97篇
  2012年   18篇
  2011年   24篇
  2010年   25篇
  2009年   36篇
  2008年   37篇
  2007年   40篇
  2006年   47篇
  2005年   35篇
  2004年   31篇
  2003年   17篇
  2002年   22篇
  2001年   13篇
  2000年   15篇
  1999年   16篇
  1998年   26篇
  1997年   13篇
  1996年   13篇
  1995年   16篇
  1994年   16篇
  1993年   8篇
  1992年   11篇
  1991年   5篇
  1990年   2篇
  1989年   7篇
  1988年   3篇
  1987年   4篇
  1986年   8篇
  1985年   6篇
  1984年   4篇
  1983年   7篇
  1982年   6篇
  1981年   3篇
  1980年   3篇
  1979年   7篇
  1978年   9篇
  1977年   5篇
  1976年   4篇
  1975年   3篇
排序方式: 共有990条查询结果,搜索用时 0 毫秒
81.
It is possible to reveal and to examine the collective and social fields of consciousness experimentally. An account is given of planned experiments based on quantitative calculations, which indicate that the effects of individual and collective fields of consciousness on matter may elicit directly observable physical results. Moreover, it is shown that collective coherent consciousness fields may enhance the physical effects of consciousness at a significant rate. The predicted results have a significance in our picture of our consciousness, in self‐assertion and dynamising of consciousness, the expansion of collective fields of consciousness, and thus the raising of the level of consciousness for humanity.  相似文献   
82.
Current research on the nature of attentional deficits in attention-deficit hyperactivity disorder (ADHD) is reviewed with a focus on studies using event-related potentials (ERPs). A robust effect is the smaller amplitude of the P3 wave to both auditory and visual stimuli for individuals with ADHD than for normal controls. This effect is indicative of deficits in the allocation of attentional resources to task-relevant information. The Nd wave is also smaller for individuals with ADHD, an effect that suggests impairments in the discrimination and preferential processing of task-relevant information, rather than distractibility by irrelevant stimuli. Studies of the effects of methylphenidate on ERPs in ADHD indicate that this stimulant enhances the quality of stimulus evaluation and speeds response time. These specific effects support the view that ADHD involves deficits in energetic processes that are required for processing task-relevant stimuli.  相似文献   
83.
This article describes the relationship between HIV testing and a range of psychosocial, sexual and socio-demographic variables. Trained research staff distributed a self-report questionnaire in the gay bars of Glasgow and Edinburgh, in May 2000. Questionnaires were completed by 803 men (a response rate of 78%). We present the results of both bivariate and multivariate analyses identifying key variables associated with never having had an HIV test. Thus we outline some psychosocial barriers to HIV testing. Multivariate analysis indicated that the most important factor associated with never having tested was fear of a positive result; this was particularly true for those men who reported higher levels of risky sexual conduct. We discuss the relevance of these findings in terms of presenting a psychosocial agenda which demands that stigma and the social exclusion of HIV positive people should be addressed before gay men are encouraged to seek HIV testing.  相似文献   
84.
Expressions for the bulk modulus and its first and second pressure derivatives for group I–VII, II–VI, III–V and IV–IV semiconductor binary compounds are derived using an ab initio pseudopotential approach to the total crystal energy within the framework of local density functional formalism. The computed results are very close to the available experimental data.  相似文献   
85.
In this article the context of Japanese education is examined to highlight those aspects most identified with the issue of testing and test anxiety. The unique organization of the Japanese formal educational system is explored as well as its governance and administration. The centralized nature of Japanese education contributes to the hierarchical nature of the system and the centrality of both local and national examinations. The existence of a parallel, less regulated educational system, generally referred to as juku, is also discussed thereby revealing the complex mix of factors that influence and shape the testing environment.  相似文献   
86.
Dental anxiety is a complicated phenomenon, and its multicomponent nature is often not acknowledged in existing measurement instruments. Using a facet design, a new Dental Anxiety Inventory (DAI) was constructed. Facets chosen were: time (made up of four elements: at home, on your way to the denstist, in the denstist's waiting room, in the dental chair), situation (three elements: introductory aspects, dentist-patient interaction, actual dental treatment), and reaction (three elements: subjective feelings, physical reactions, cognitive reactions). Psychometric qualities of the DAI are good. The internal structure of the DAI was studied by linear and nonlinear techniques, and was partially recovered from the data. The construct and criterion validity of the DAI was supported in several studies.  相似文献   
87.
The hypotheses that test anxiety is associated with a deficit in prior knowledge and/or working memory capacity, that anxiety impairs comprehension efficiency, and that deficits in knowledge and capacity underlie the efficiency impairment, were tested. In Study 1, high-anxiety students were characterized by lower scores in several vocabulary measures, compared with low-anxiety students. In Study 2, high-anxiety individuals showed inferior working memory capacity to low-anxiety individuals under evaluative stress conditions, but not under non-stress conditions. In Study 3 high-anxiety subjects exhibited lower efficiency scores than low-anxiety subjects in expository texts without a summary: The former employed a greater amount of reading time than the latter to acquire an equivalent amount of information. In addition, the disadvantage in efficiency associated with anxiety was removed when differences in vocabulary knowledge were partialled out statistically. Instead, that disadvantage was only reduced, but not eliminated, when differences in transitory working memory capacity were partialled out. Therefore, the prior knowledge deficit hypothesis accounts for the impairment in reading efficiency associated with high anxiety better than the transitory working memory reduction hypothesis.  相似文献   
88.
Given the increased testing of school-aged children in the United States there is a need for a current and valid scale to measure the effects of test anxiety in children. The domain of children's test anxiety was theorized to be comprised of three dimensions: thoughts, autonomic reactions, and off-task behaviors. Four stages are described in the evolution of the Children's Test Anxiety Scale (CTAS): planning, construction, quantitative evaluation, and validation. A 50-item scale was administered to a development sample (N=230) of children in grades 3–6 to obtain item analysis and reliability estimates which resulted in a refined 30-item scale. The reduced scale was administered to a validation sample (N=261) to obtain construct validity evidence. A three-factor structure fit the data reasonably well. Recommendations for future research with the scale are described.  相似文献   
89.
Summary

In this chapter, practicing attorney Brooks Cooper illuminates how the legal tradition of applying different standards to the ad-missibility of expert and lay opinions as evidence in litigation complicates delayed-discovery sexual abuse cases. Admissibility standards have long been a source of controversy, and recent developments in law, such as the pre-trial evidentiary hearings that invoke the “gatekeeper” function of the judge under the standard enunciated in Daubert v. Mer-rell-Dow Pharmaceuticals, have become a favored strategy by the defense in an effort to bar delayed memory testimony by characterizing it as the product of unreliable science. To overcome this litigation hurdle, Mr. Cooper contextualizes the present controversy in the history of scientific evidence admissibility, tracing emerging trends in judicial opinion on scientific evidence from expert witnesses from the 1923 case Frye v. United States through the present, and offers strategies and techniques to maintain admissibility of the evidence before and during all phases of the trial.  相似文献   
90.
ABSTRACT

We evaluated the reliability, validity, and differential item functioning (DIF) of a shorter version of the Defining Issues Test-1 (DIT-1), the behavioural DIT (bDIT), measuring the development of moral reasoning. About 353 college students (81 males, 271 females, 1 not reported; age M = 18.64 years, SD = 1.20 years) who were taking introductory psychology classes at a public University in a suburb area in the Southern United States participated in the present study. First, we examined the reliability of the bDIT using Cronbach’s α and its concurrent validity with the original DIT-1 using disattenuated correlation. Second, we compared the test duration between the two measures. Third, we tested the DIF of each question between males and females. Findings reported that first, the bDIT showed acceptable reliability and good concurrent validity. Second, the test duration could be significantly shortened by employing the bDIT. Third, DIF results indicated that the bDIT items did not favour any gender. Practical implications of the present study based on the reported findings are discussed.  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