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   961篇
  免费   25篇
  国内免费   2篇
  2022年   8篇
  2019年   10篇
  2018年   10篇
  2017年   11篇
  2016年   13篇
  2015年   21篇
  2014年   10篇
  2013年   126篇
  2012年   24篇
  2011年   33篇
  2010年   18篇
  2009年   21篇
  2008年   16篇
  2007年   26篇
  2006年   31篇
  2005年   34篇
  2004年   23篇
  2003年   40篇
  2002年   28篇
  2001年   16篇
  2000年   21篇
  1999年   19篇
  1998年   15篇
  1997年   14篇
  1996年   11篇
  1995年   8篇
  1994年   8篇
  1993年   8篇
  1991年   11篇
  1987年   8篇
  1985年   14篇
  1984年   13篇
  1983年   10篇
  1982年   12篇
  1981年   18篇
  1980年   15篇
  1979年   17篇
  1978年   14篇
  1977年   8篇
  1976年   7篇
  1975年   15篇
  1974年   20篇
  1973年   11篇
  1972年   9篇
  1971年   7篇
  1970年   9篇
  1969年   7篇
  1968年   9篇
  1967年   9篇
  1966年   10篇
排序方式: 共有988条查询结果,搜索用时 15 毫秒
881.
The purpose of the current study was to determine if smoking on high-school property was associated with increased risk for other substance use among U.S. adolescents. Secondary analyses were carried out with data from the 2011 Youth Risk Behavior Survey (YRBS, N = 15,503). Only adolescents who reported smoking at least one cigarette in the last 30 days were selected for analyses (n = 2531, 44% female). Alcohol, marijuana, and cocaine use was assessed among participants. Binary logistic regression analysis was carried out to examine the relationship between smoking on school property (yes versus no) with each of the substance use variables. Adolescent smokers who reported smoking on school property were significantly more likely to report substance use across all substances examined compared to smokers who did not smoke on campus. For example, campus smokers were 3.91 times more likely to use marijuana in their lifetime and 3.85 times more likely to have used crack or cocaine in their lifetime compared to smokers who did not smoke on campus. Health care providers who provide services to adolescents should screen for smoking on school property to help identify adolescents at increased risk for substance use.  相似文献   
882.
883.
Individuals who experience electrical injury suffer significant, sometimes long‐term deficits in neuropsychological functioning. The TASER, an electrical device used by thousands of police departments, generates a high‐voltage (up to 50 000 V), low‐amperage (2.1 mA) current of electricity that is designed to disable a resistive criminal suspect. Questions have emerged regarding the potential for TASER exposure to cause impairment in cognitive functioning. In the current study, healthy human volunteers were randomly assigned to four groups, two of which received a TASER exposure. Participants completed a battery of cognitive tests before and after receiving their assigned treatment. Participants who received a TASER exposure experienced statistically meaningful declines in measures of verbal learning and memory, although deficits lasted less than 1 hour. After TASER exposure, participants also self‐reported significant difficulties with concentration, anxiety, and feeling overwhelmed. Other dimensions of cognitive functioning were not affected. Our findings show that the effects of TASER exposure on brain functioning are not well understood. Copyright © 2015 John Wiley & Sons, Ltd.  相似文献   
884.
The stability of eyewitness confidence judgments over time in regard to their reported memory and accuracy of these judgments is of interest in forensic contexts because witnesses are often interviewed many times. The present study investigated the stability of the confidence judgments of memory reports of a witnessed event and of the accuracy of these judgments over three occasions, each separated by 1 week. Three age groups were studied: younger children (8–9 years), older children (10–11 years), and adults (19–31 years). A total of 93 participants viewed a short film clip and were asked to answer directed two-alternative forced-choice questions about the film clip and to confidence judge each answer. Different questions about details in the film clip were used on each of the three test occasions. Confidence as such did not exhibit stability over time on an individual basis. However, the difference between confidence and proportion correct did exhibit stability across time, in terms of both over/underconfidence and calibration. With respect to age, the adults and older children exhibited more stability than the younger children for calibration. Furthermore, some support for instability was found with respect to the difference between the average confidence level for correct and incorrect answers (slope). Unexpectedly, however, the younger children’s slope was found to be more stable than the adults. Compared to the previous research, the present study’s use of more advanced statistical methods provides a more nuanced understanding of the stability of confidence judgments in the eyewitness reports of children and adults.  相似文献   
885.
We present a semi-parametric approach to estimating item response functions (IRF) useful when the true IRF does not strictly follow commonly used functions. Our approach replaces the linear predictor of the generalized partial credit model with a monotonic polynomial. The model includes the regular generalized partial credit model at the lowest order polynomial. Our approach extends Liang’s (A semi-parametric approach to estimate IRFs, Unpublished doctoral dissertation, 2007) method for dichotomous item responses to the case of polytomous data. Furthermore, item parameter estimation is implemented with maximum marginal likelihood using the Bock–Aitkin EM algorithm, thereby facilitating multiple group analyses useful in operational settings. Our approach is demonstrated on both educational and psychological data. We present simulation results comparing our approach to more standard IRF estimation approaches and other non-parametric and semi-parametric alternatives.  相似文献   
886.
Carl G. Wagner 《Erkenntnis》2011,74(2):277-288
It has often been recommended that the differing probability distributions of a group of experts should be reconciled in such a way as to preserve each instance of independence common to all of their distributions. When probability pooling is subject to a universal domain condition, along with state-wise aggregation, there are severe limitations on implementing this recommendation. In particular, when the individuals are epistemic peers whose probability assessments are to be accorded equal weight, universal preservation of independence is, with a few exceptions, impossible. Under more reasonable restrictions on pooling, however, there is a natural method of preserving the independence of any fixed finite family of countable partitions, and hence of any fixed finite family of discrete random variables.  相似文献   
887.
Rethinking Emancipation,Rethinking Education   总被引:1,自引:0,他引:1  
In this paper I discuss the possibility of the idea of emancipation within an educational philosophy that does not accept schooling as its first premise. The first part of the paper will take Sweden as an example of an educational state defined through educational policies such as life long learning, accountability and evidence-based research, and argue that these words are only meaningful within the myth of schooling and not in a language of education/emancipation. The second part of the paper discusses different but related conceptions of emancipation by exploring its ambiguous nature. In the third part of the paper I specify the role and place of emancipation within a philosophy of education that seeks to articulate its social value.  相似文献   
888.
889.
Conceptual similarities between recent models of insomnia and emotional disorders suggest there may be common factors that underlie or maintain these difficulties. Maladaptive cognitive and behavioral processes similar to those described in connection with emotional disorders have been cited as key mechanisms in the maintenance of primary insomnia. Unfortunately, research on this potential overlap is lacking. The present study examined the relationship among anxiety sensitivity (AS), dysfunctional beliefs, fatigue, safety behaviors, and insomnia severity in 59 outpatients with anxiety and mood disorders. Key insomnia processes (dysfunctional beliefs, fatigue, safety behaviors) were all related to insomnia severity in the comorbid sample, although AS was not. However, as hypothesized, AS did moderate the relationship of both dysfunctional beliefs and fatigue with insomnia severity. The relationships between key insomnia processes and insomnia severity was strongest among individuals high in AS. Results support the hypothesis that common mechanisms are involved for insomnia and emotional disorders. AS might function as a mechanism for the maintenance of sleep disturbance in the context of anxiety and mood disorders, suggesting a promising avenue for future research.  相似文献   
890.
In this paper I argue against one variety of contextualism about aesthetic predicates such as “beautiful.” Contextualist analyses of these and other predicates have been subject to several challenges surrounding disagreement. Focusing on one kind of contextualism—individualized indexical contextualism—I unpack these various challenges and consider the responses available to the contextualist. The three responses I consider are as follows: giving an alternative analysis of the concept of disagreement; claiming that speakers suffer from semantic blindness; and claiming that attributions of beauty carry presuppositions of commonality. I will argue that none of the available strategies gives a response which both (a) satisfactorily explains all of the disagreement-data and (b) is plausible independent of significant evidence in favor of contextualism. I conclude that individualized indexical contextualism about the aesthetic is untenable, although this does not rule out alternative contextualist approaches to the aesthetic.  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