全文获取类型
收费全文 | 1188篇 |
免费 | 63篇 |
国内免费 | 1篇 |
出版年
2024年 | 5篇 |
2023年 | 22篇 |
2022年 | 20篇 |
2021年 | 25篇 |
2020年 | 47篇 |
2019年 | 53篇 |
2018年 | 66篇 |
2017年 | 66篇 |
2016年 | 54篇 |
2015年 | 42篇 |
2014年 | 58篇 |
2013年 | 142篇 |
2012年 | 72篇 |
2011年 | 64篇 |
2010年 | 55篇 |
2009年 | 28篇 |
2008年 | 61篇 |
2007年 | 59篇 |
2006年 | 46篇 |
2005年 | 32篇 |
2004年 | 29篇 |
2003年 | 37篇 |
2002年 | 32篇 |
2001年 | 9篇 |
2000年 | 8篇 |
1999年 | 12篇 |
1998年 | 10篇 |
1997年 | 9篇 |
1995年 | 5篇 |
1994年 | 11篇 |
1993年 | 6篇 |
1992年 | 3篇 |
1991年 | 4篇 |
1989年 | 4篇 |
1986年 | 2篇 |
1985年 | 3篇 |
1984年 | 2篇 |
1983年 | 5篇 |
1982年 | 3篇 |
1981年 | 4篇 |
1978年 | 3篇 |
1977年 | 2篇 |
1975年 | 2篇 |
1974年 | 2篇 |
1969年 | 2篇 |
1967年 | 2篇 |
1966年 | 2篇 |
1965年 | 2篇 |
1948年 | 2篇 |
1933年 | 2篇 |
排序方式: 共有1252条查询结果,搜索用时 15 毫秒
941.
Traffic research shares a fundamental dilemma with other areas of empirical research in which humans are potentially put at risk. Research is justified because it can improve safety in the long run. Nevertheless, people can be harmed in the research situation. Hence, we need to balance short-term risks against long-term safety improvements, much as in other areas of research with human subjects. In this paper we focus on ethical issues that arise when human beings are directly affected in the performance of research by examining how the ethical requirements in biomedical research can inform traffic research. After introducing the basic ethical requirements on biomedical research, each of the major requirements is discussed in relation to traffic research. We identify the main areas where biomedical research and traffic research differ, and where the ethical requirements from the former cannot easily be transferred to the latter. Finally, we argue that there is a need for systematic studies of the ethics of traffic research and point to some of the issues that need to be addressed. 相似文献
942.
Margolin SJ Abrams L 《Neuropsychology, development, and cognition. Section B, Aging, neuropsychology and cognition》2007,14(5):529-544
Young and older adults' ability to retrieve the spellings of high- and low-frequency words was assessed via tests of spelling recognition and production. One of the spelling production tests required participants to write down the correct spellings of auditorily presented words, and accuracy was used to categorize participants in both age groups as good or poor spellers. The results showed that individual spelling ability and word frequency contributed to age differences. Older adults who were poor spellers were less accurate in recognizing and producing correct spelling than young adults who were poor spellers. In contrast, no age differences occurred for good spellers. Furthermore, low-frequency words were especially difficult for young adults and poor spellers, relative to older adults and good spellers. These results indicate that aging alone is not detrimental to the processes underlying recognition or production of spelling but instead compounds existing problems caused by poor spelling. 相似文献
943.
944.
Bessette Katie L. Karstens Aimee J. Crane Natania A. Peters Amy T. Stange Jonathan P. Elverman Kathleen H. Morimoto Sarah Shizuko Weisenbach Sara L. Langenecker Scott A. 《Neuropsychology review》2020,30(4):477-498
Neuropsychology Review - The cognitive processes involved in inhibitory control accuracy (IC) and interference resolution speed (IR) or broadly – inhibition – are discussed in this... 相似文献
945.
Boddington Robert Gómez Dunlop Clara A. Garnham Laura C. Ryding Sara Abbey-Lee Robin N. Kreshchenko Anastasia Løvlie Hanne 《Animal cognition》2020,23(5):901-911
Animal Cognition - Intra-species cognitive variation is commonly observed, but explanations for why individuals within a species differ in cognition are still understudied and not yet clear.... 相似文献
946.
Pilar Bustillo-Casero Sara Cebrian-Bou Carlos Cruz-Montecinos Alberto Pardo 《Journal of motor behavior》2020,52(2):187-195
Abstract The aim was to assess dual- versus single-task training for motor performance and cognitive performance in adolescents. Two experiments were performed. In the first, 30 adolescents were randomized to three groups to determine the effect of dual-task difficulty on postural control: α-scaling and root mean square (RMS). In the second, 20 adolescents were randomized to two groups to determine the effect of dual-task practice to improve working memory. RMS in the post-test was lower than the pre-test in both dual-task groups, while α-scaling was lower in post-test than pre-test only in the high-difficulty dual-task group. A practice effect was observed on the percentage of correct answers only in the dual-task group (p?=?0.035). Thus, dual-task training could enhance motor and cognitive performance more than single-task training. 相似文献
947.
Philosophical Studies - This paper develops and articulates a metaphysics of intersectionality, the idea that multiple axes of social oppression cross-cut each other. Though intersectionality is... 相似文献
948.
Martin Musálek Sara M. Scharoun Benson Alena Lejcarova Pamela J. Bryden 《International journal of psychology》2020,55(6):973-982
Cross-lateralisation and increased motor difficulties have been reported in children with attention-deficit/hyperactivity disorder (ADHD). Nevertheless, the question of how crossed (i.e. mixed preference) or uncrossed (i.e. same side preference) lateralisation impacts motor performance in children with ADHD has yet to be examined. In this study, previously validated observational measures of hand and foot preference were used to identify right-handed children with ADHD who display cross- (n = 29) and uncross-lateralisation (n = 31). An uncross-lateralised typically developing (TD) group (n = 32) was also identified, and included as a control. Motor performance was assessed with seven valid and reliable fine and gross motor tasks performed with both preferred and non-preferred limbs. Group, task and sex-related effects were examined. Findings revealed that male (but not female) cross-lateralised children with ADHD performed significantly worse, respectively, in two of the fine motor tasks (spiral tracing [p < .01], and dot filling [p < .05]). Results suggest that cross-lateralised hand and foot preference may affect complex motor skills in male children with ADHD. Furthermore, characteristics of ADHD may manifest differently in male and female children. Findings highlight the importance of considering both hand and foot preference when targeting motor interventions for children with ADHD. 相似文献
949.
The preferred values and personality traits of young athletes allow to predict their decisions in the sports context. Of 120 primary and junior high school students that were surveyed, including 60 students following an extended sports curriculum and 60 students following a standard curriculum. The athletes practiced soccer, basketball and swimming. The Picture-Based Value Survey for Children based on Schwartz's theory of universal values and the Picture-Based Personality Survey for Children predicated on the Big Five model of personality were used in this study. Regression analysis with an interaction effect of type of school program on relationships between values and personality traits was carried out. Effects were observed between the type of program and preference for Universalism and Conscientiousness and preference for Hedonism and Agreeableness. In athletes, Conscientiousness correlated positively with preference for Universalism. In non-athletes, a positive correlation was found between Agreeableness and preference for Hedonism. 相似文献
950.
Gutierrez Brenda C. Halim May Ling D. Ng Florrie Fei-Yin Kwak Keumjoo Ortiz-Cubias Sara Cheng Grace Yui-Lei Sze Irene Nga-Lam 《Sex roles》2020,82(5-6):306-320
Sex Roles - Many young children often exhibit a strong desire to wear extremely gender-typed clothing (appearance rigidity), reflecting their emerging gender identities. However, research on... 相似文献