全文获取类型
收费全文 | 540篇 |
免费 | 41篇 |
国内免费 | 34篇 |
专业分类
615篇 |
出版年
2024年 | 3篇 |
2023年 | 11篇 |
2022年 | 55篇 |
2021年 | 44篇 |
2020年 | 59篇 |
2019年 | 12篇 |
2018年 | 55篇 |
2017年 | 40篇 |
2016年 | 47篇 |
2015年 | 27篇 |
2014年 | 36篇 |
2013年 | 36篇 |
2012年 | 4篇 |
2011年 | 15篇 |
2010年 | 4篇 |
2009年 | 11篇 |
2008年 | 17篇 |
2007年 | 11篇 |
2006年 | 17篇 |
2005年 | 11篇 |
2004年 | 22篇 |
2003年 | 4篇 |
2002年 | 3篇 |
2001年 | 9篇 |
2000年 | 2篇 |
1999年 | 4篇 |
1998年 | 2篇 |
1997年 | 3篇 |
1996年 | 1篇 |
1995年 | 3篇 |
1993年 | 1篇 |
1992年 | 5篇 |
1991年 | 4篇 |
1990年 | 3篇 |
1989年 | 2篇 |
1988年 | 7篇 |
1987年 | 2篇 |
1986年 | 3篇 |
1985年 | 3篇 |
1984年 | 3篇 |
1983年 | 3篇 |
1982年 | 1篇 |
1981年 | 5篇 |
1980年 | 3篇 |
1978年 | 1篇 |
1976年 | 1篇 |
排序方式: 共有615条查询结果,搜索用时 15 毫秒
121.
Dana M. Rhule-Louie Sarah Bowen John S. Baer Peggy L. Peterson 《Journal of child and family studies》2008,17(3):306-319
This study examines how substance use is associated with the health and safety of homeless youth using cross-sectional, self-report
data from 285 homeless adolescents. Path models were used to examine concurrent relationships between youth’s substance use
and multiple aspects of their health and safety, including measures of psychological distress, housing risk and instability,
and medical problems. Substance use was examined with both global (i.e., a composite of days of use across various drugs and
alcohol) and specific (i.e., rates of use of specific drugs, injection drug use) measures. After controlling for demographic
and historical variables, number of days of use was significantly related to psychological distress, whereas injection drug
use was significantly related to housing risk. Examination of specific drugs revealed relationships between psychological
distress and the use of alcohol, cocaine, and amphetamines, and a specific relationship between housing risk and the use of
heroin. None of the measures of substance use was significantly related to youth’s medical problems. Implications for interventions
with homeless adolescents are discussed. 相似文献
122.
I. Lewis B. Watson K.M. White 《Transportation Research Part F: Traffic Psychology and Behaviour》2008,11(6):403-417
Drawing upon the multiple roles of affect posited by Elaboration Likelihood Model, the current paper examines the effectiveness of message-relevant affect. Specifically, humourous and fear-evoking anti-drink driving messages are examined in terms of perceptions of relative influence on self and others (i.e., the third-person effect) and their performance on a range of persuasion outcomes. The influence of involvement, response efficacy, and gender on persuasion outcomes is also examined. Participants (N = 201) viewed two advertisements and completed two questionnaires: the first, assessed pre-exposure attitudes and behaviour and immediate-post exposure attitudes and intentions; the second, 2–4 weeks later, assessed attitudes and behaviour. The results revealed, as predicted, interactions of the key variables and evidence of the greater persuasiveness of negative appeals immediately after exposure whilst greater improvement of positive appeals over time. The findings highlight the importance of continuing the exploration of positive appeals as a persuasive alternative to negative appeals. 相似文献
123.
Toshihisa Sato Motoyuki Akamatsu 《Transportation Research Part F: Traffic Psychology and Behaviour》2008,11(4):242-258
This paper focuses on modeling and predicting the influence of a vehicle’s velocity and the relative position between a driver’s vehicle and a vehicle to the front or rear on the onset of driver preparations for making a right turn at an intersection. Repeated experiments were carried out on a public road to measure driver preparations, including releasing the accelerator pedal, moving the right foot to cover the brake pedal, and activating the turn signal, as well as to record vehicle velocity and the relative distances to the leading and following vehicles. Structural equation modeling was applied to estimate these relationships quantitatively. Two separate latent variables accounting for the interaction between the driver’s vehicle and leading or following vehicles, and the onset point where driving behavior changes from straight mode to preparation mode before a right turn, were introduced in the specification of the structural equation model. The model estimates and testing indicate that the proposed structural equation model represents well the relationship hypothesized by observational analysis: that the vehicle velocity and the traffic conditions surrounding the driver’s vehicle strongly influence the driver’s deceleration and more weakly influenced turn signal activation. The proposed structural equation model contributes to the prediction of the onset locations of covering the brake pedal and activating the turn signal based on the vehicle velocity and the relative distances to the front and rear vehicles when the accelerator pedal is released. The prediction accuracy is high compared with predictions in which the vehicle velocity and the headway or rear distances are not taken into account or predictions using a single regression model with one independent variable, namely driving speed. Finally, a possible new addition to in-vehicle navigation systems that detects unusual driver behavior by predicting the driver’s preparatory maneuvers is discussed. 相似文献
124.
Veysel Ylmaz H. Eray elik 《Transportation Research Part F: Traffic Psychology and Behaviour》2008,11(4):233-241
There exist a good many scientific studies into risk-taking and risky behavior displayed by reckless drivers; however, there are only a few studies into attitudes towards the traffic displayed by candidate drivers. The present study aims to investigate the dimensionality of candidate attitudes’ drivers. Data were collected from questionnaire completed by 258 candidate drivers, and were divided into two sets. The first data was used to explore the underlying factor structure and five latent factors were derived; Factor A Attitude towards drinking and driving; Factor P positive attitude toward traffic; Factor S speeding; Factor T traffic flow vs. rule obedience; and Factor R risky candidate driver’s attitude. The second data set was used to confirm this factorial structure using confirmatory factor analysis. The fit indices showed that the model fitted the data well. 相似文献
125.
Gianluca Gini Tiziana Pozzoli Francesco Borghi Lara Franzoni 《Journal of School Psychology》2008,46(6):617-638
Two studies employing a mixed experimental design were conducted to determine if perceptions of bullying, attitudes towards victims, and students' sense of safety at school were influenced by bystanders' reactions to different types of bullying. In Study 1, 217 middle-school children were randomly assigned to read a hypothetical scenario describing a direct bullying episode. In Study 2, 376 primary-school children and 390 middle-school children were presented with scenarios describing a direct bullying episode and an indirect bullying episode. In all scenarios, the bystanders' reactions to the bullying and the gender of the victim were manipulated. Participants endorsed the prosocial behavior in favor of the victims and did not endorse pro-bullying behavior. Furthermore, they perceived passive reactions to the bullying as negative behavior. Participants showed positive attitudes towards victims, which were significantly higher at younger grade levels and among girls. Bystanders' behavior influenced both participants' perceptions of the victims and their perceived sense of safety at school. Implications for anti-bullying programs based upon the group ecology are discussed. 相似文献
126.
KELLY BECKER 《Metaphilosophy》2006,37(5):691-704
Abstract: Duncan Pritchard has recently highlighted the problem of veritic epistemic luck and claimed that a safety‐based account of knowledge succeeds in eliminating veritic luck where virtue‐based accounts and process reliabilism fail. He then claims that if one accepts a safety‐based account, there is no longer a motivation for retaining a commitment to reliabilism. In this article, I delineate several distinct safety principles, and I argue that those that eliminate veritic luck do so only if at least implicitly committed to reliabilism. 相似文献
127.
Peter Murphy 《Erkenntnis》2006,65(3):365-383
This paper looks at an argument strategy for assessing the epistemic closure principle. This is the principle that says knowledge
is closed under known entailment; or (roughly) if S knows p and S knows that p entails q, then S knows that q. The strategy
in question looks to the individual conditions on knowledge to see if they are closed. According to one conjecture, if all
the individual conditions are closed, then so too is knowledge. I give a deductive argument for this conjecture. According
to a second conjecture, if one (or more) condition is not closed, then neither is knowledge. I give an inductive argument
for this conjecture. In sum, I defend the strategy by defending the claim that knowledge is closed if, and only if, all the
conditions on knowledge are closed. After making my case, I look at what this means for the debate over whether knowledge
is closed. 相似文献
128.
随着转基因食品不断地进入市场,学者和公众对转基因食品是否危害人类健康展开了激烈的争论。介绍转基因食品安全性评价的科学指标,运用伦理学的基本原则对两种观点进行了分析,并提出对转基因食品采取“有罪推定”的战略。 相似文献
129.
David C. Schwebel 《Journal of clinical psychology in medical settings》2006,13(2):135-143
Over 200,000 American children visit the emergency room annually after a playground injury. Among the most promising means to reduce playground injuries is through increased quantity and quality of playground supervision by adults. To implement empirically supported playground supervision interventions, it is essential to understand how supervision prevents injuries. Recent research suggests supervision likely prevents injuries through several different mechanisms; this paper discusses six: (a) Supervisors repetitively teach children playground rules; (b) supervisors recognize and stop children's dangerous behavior; (c) supervisors prevent children from behaving impulsively; (d) the presence of a supervisor causes children to behave differently; (e) supervisors change children's attribution of risk; and (f) supervisors have influence as modelers and persuaders of safe behavior. Theoretical implications for future work and applied implications for the development of playground safety interventions are discussed. 相似文献
130.
影响大学生人际关系主观因素的初步研究 总被引:13,自引:0,他引:13
用自编的大学生人际关系主观因素问卷对800名1-4年级本科生进行调查。结果表明,影响大学生人际关系的主观因素涉及人际安全、人际疑虑、人际张力和人际报复;大学生的人际安全因子得分为3.86,人际张力、人际疑虑和人际报复因子得分和总均分在1.8-2.6之间;人际张力、人际疑虑、人际报复因子存在显著的年级差异(p<0.01);男生在人际报复因子上的得分明显高于女生;理科生的人际张力、人际报复和主观因素总均分显著高于文科生,人际安全因子得分显著低于文科生。表明大学生的人际安全感较强,人际交往和相处中的负性体验较弱,但存在年级、性别、专业等方面的差异。 相似文献