全文获取类型
收费全文 | 491篇 |
免费 | 21篇 |
出版年
2023年 | 6篇 |
2022年 | 5篇 |
2021年 | 3篇 |
2020年 | 8篇 |
2019年 | 12篇 |
2018年 | 25篇 |
2017年 | 17篇 |
2016年 | 17篇 |
2015年 | 13篇 |
2014年 | 11篇 |
2013年 | 60篇 |
2012年 | 15篇 |
2011年 | 21篇 |
2010年 | 14篇 |
2009年 | 10篇 |
2008年 | 15篇 |
2007年 | 16篇 |
2006年 | 23篇 |
2005年 | 16篇 |
2004年 | 18篇 |
2003年 | 21篇 |
2002年 | 13篇 |
2001年 | 10篇 |
2000年 | 14篇 |
1999年 | 9篇 |
1998年 | 7篇 |
1997年 | 6篇 |
1996年 | 4篇 |
1994年 | 3篇 |
1993年 | 5篇 |
1992年 | 4篇 |
1991年 | 3篇 |
1989年 | 6篇 |
1988年 | 3篇 |
1987年 | 6篇 |
1986年 | 3篇 |
1985年 | 5篇 |
1984年 | 8篇 |
1982年 | 8篇 |
1981年 | 3篇 |
1980年 | 2篇 |
1979年 | 7篇 |
1977年 | 2篇 |
1976年 | 2篇 |
1975年 | 2篇 |
1974年 | 9篇 |
1973年 | 4篇 |
1971年 | 3篇 |
1970年 | 2篇 |
1968年 | 2篇 |
排序方式: 共有512条查询结果,搜索用时 15 毫秒
71.
This study is based on analysis of copyright policies and 26 interviews with science and engineering faculty at three research
universities on the topic of copyright beliefs, values, and practices, with emphasis on copyright of instructional materials,
courseware, tools, and texts. Given that research universities now emphasize increasing external revenue flows through marketing
of intellectual property, we expected copyright to follow the path of patents and lead to institutional emphasis of policies
and practices that enhanced universities’ intellectual property portfolios, accompanied by an increase in copyrighting by
professors. Although this pattern occurred with regard to institutions, professors offered a more varied pattern, with some
fully participating in commercialization of copyright and embracing entrepreneurial values, while others resisted or subverted
commercial activity in favor of traditional science and engineering values. 相似文献
72.
Sheila Garos Annette S. Kluck James K. Beggan Jeffrey Martindale Amanda Easton Wheeler Tammy Lowery Zacchilli 《Sex roles》2008,58(5-6):311-329
Temptation bias is the tendency to see oneself as better than others at resisting temptation. To understand the influence
of self-enhancement and gender stereotypes on temptation bias, 215 undergraduates from a university located in the southwest
region of the United States compared their ability to resist ten sexually tempting scenarios to that of others in general,
and to their romantic partner (Study 1). An additional 151 undergraduates from the same university rated their own or their partner’s ability to resist seven sexually
tempting scenarios compared to other men and women (Study 2). Results revealed that temptation bias was present but reduced when romantic partners were the comparison targets; and when
comparing themselves to others, women displayed temptation bias regardless of the gender of the referent while men displayed
temptation bias only when comparing themselves to men. 相似文献
73.
Recruitment of anterior and posterior structures in lexical-semantic processing: an fMRI study comparing implicit and explicit tasks 总被引:1,自引:0,他引:1
Previous studies examining explicit semantic processing have consistently shown activation of the left inferior frontal gyrus (IFG). In contrast, implicit semantic processing tasks have shown activation in posterior areas including the superior temporal gyrus (STG) and the middle temporal gyrus (MTG) with less consistent activation in the IFG. These results raise the question whether the functional role of the IFG is related to those processes needed to make a semantic decision or to processes involved in the extraction and analysis of meaning. This study examined neural activation patterns during a semantic judgment task requiring overt semantic analysis, and then compared these activation patterns to previously obtained results using the same semantically related and unrelated word pairs in a lexical decision task which required only implicit semantic processing (Rissman, J., Eliassen, J. C., & Blumstein, S. E. (2003). An event-related fMRI investigation of implicit semantic priming. Journal of Cognitive Neuroscience, 15, 1160-1175). The behavioral results demonstrated that the tasks were equivalent in difficulty. fMRI results indicated that the IFG and STG bilaterally showed greater activation for semantically unrelated than related word pairs across the two tasks. Comparison of the two task types across conditions revealed greater activation for the semantic judgment task only in the STG bilaterally and not in the IFG. These results suggest that the pre-frontal cortex is recruited similarly in the service of both the lexical decision and semantic judgment tasks. The increased activation in the STG in the semantic judgment task reflects the greater depth of semantic processing required in this task and indicates that the STG is not simply a passive store of lexical-semantic information but is involved in the active retrieval of this information. 相似文献
74.
An important function of the self is to identify external objects that are potentially personally relevant. We suggest that such objects may be identified through mere ownership. Extant research suggests that encoding information in a self-relevant context enhances memory (the so-called 'self-reference effect'), thus an experiment was designed to test the impact of ownership on memory performance. Participants either moved or observed the movement of picture cards into two baskets; one of which belonged to self and one which belonged to another participant. A subsequent recognition test revealed that there was a significant memory advantage for objects that were owned by self. Acting on items (i.e., moving them) had no impact on memory. Results are discussed with reference to the importance of self-object associations in cognition. 相似文献
75.
Previous research indicates that, while making money is important to college students, it is negatively correlated with subjective well-being. This study asked 157 undergraduate business and psychology students about the importance of making money, their motives for doing so, and several dimensions of subjective well-being: satisfaction with life, self-actualization, and mood/affect. Making money remains very important to college students. Being motivated to make money was not globally related to subjective well-being, but wanting to make money to help others, to feel secure, and to feel proud of oneself were predictive of happiness or subjective well-being. Motives such as comparing oneself favorably to others, spending impulsively, and overcoming self-doubt were not correlated with subjective well-being. Business students appeared more motivated to make money than other students and also to have more negative affect. 相似文献
76.
Otto S 《The Journal of clinical ethics》2007,18(3):247-251
This was a troublesome case, without complete consensus about the right thing to do. It seemed there were arguments on both sides: those who thought that the goal of comfort care without treatment was most consistent with his wishes, versus those who thought the additional testing and treatment might have produced a net benefit in spite of the burdens. Ultimately, the patient was placed in a facility with a do-not-resuscitate (DNR) order in effect and a plan for comfort care. He may live a few months or more. We all hope that whatever time he has is spent free of pain and symptoms, and that he is able to live a life of quality consistent with his wishes. The main story line is consistent with actual events; however, there have been changes in terms of gender, disease, and relationships that have been included to protect the anonymity of the patient. 相似文献
77.
Lucas Alexander Haley Commons-Miller Michael Lamport Commons 《Journal of Adult Development》2007,14(3-4):122-125
Using ideas from evolution, and what is known about higher stages of development, we examine a hypothetical scenario, in which new humanoid species, called Superions, are produced. What would then happen with current humans? Recent genetic engineering advances have led to creating life forms with particular characteristics. Scientists are already genetically engineering human beings. Some changes are to improve health. Engineering of traits such as intelligence, higher stage reasoning or less neuroticism is also very likely. This is seen as the ultimate terrorist act because it is genocide, not against a culture, but against an entire species. The article will also discuss how Homo Sapiens could defend themselves against this. Relating two species (systems), the Homo Sapiens and Superions constitutes metasystematic operations. Developing a system of discourse that would not destroy the Homo-sapiens requires paradigmatic operations (Sonnert and Commons, Individ Soc 4:31–35, 1994). 相似文献
78.
Paulo A. S. Veloso Renata P. de Freitas Petrucio Viana Mario Benevides Sheila R. M. Veloso 《Journal of Philosophical Logic》2007,36(5):489-509
We compare fork arrow logic, an extension of arrow logic, and its natural first-order counterpart (the correspondence language)
and show that both have the same expressive power. Arrow logic is a modal logic for reasoning about arrow structures, its
expressive power is limited to a bounded fragment of first-order logic. Fork arrow logic is obtained by adding to arrow logic
the fork modality (related to parallelism and synchronization). As a result, fork arrow logic attains the expressive power
of its first-order correspondence language, so both can express the same input–output behavior of processes. 相似文献
79.
Emily B. Myers Sheila E. Blumstein Edward Walsh James Eliassen 《Psychological science》2009,20(7):895-903
ABSTRACT— The problem of mapping differing sensory stimuli onto a common category is fundamental to human cognition. Listeners perceive stable phonetic categories despite many sources of acoustic variability. What are the neural mechanisms that underlie this perceptual stability? In this functional magnetic resonance imaging study, a short-interval habituation paradigm was used to investigate neural sensitivity to acoustic changes within and between phonetic categories. A region in the left inferior frontal sulcus showed a pattern of activation consistent with phonetic invariance: insensitivity to acoustic changes within a phonetic category and sensitivity to changes between phonetic categories. Left superior temporal regions, in contrast, showed graded sensitivity to both within- and between-category changes. These results suggest that perceptual insensitivity to changes within a phonetic category may arise from decision-related mechanisms in the left prefrontal cortex and add to a growing body of literature suggesting that the inferior prefrontal cortex plays a domain-general role in computing category representations. 相似文献
80.
Anna-Lind Petursdottir Kristen McMaster Jennifer J. McComas Tracy Bradfield Viveca Braganza Julie Koch-McDonald Roxana Rodriguez Haley Scharf 《Journal of School Psychology》2009,47(4):215-243
The purpose of this study was to investigate how brief experimental analyses (BEAs) could be used to identify effective interventions for Kindergartners (2 girls and 2 boys, 5 years and 7-10 months old) with low performance and/or growth slope in letter sound fluency (LSF). Interventions were tested within a multielement design with brief mini-reversals until an intervention yielding at least 20% improvement on a specific subskill measure or a curriculum-based measure of LSF was identified. BEA-identified interventions were implemented one-on-one for 5 to 9 weeks. A multiple-baseline design across participants showed large intervention effects (average adjusted d = 2.4) on general outcome measures, supporting treatment validity of BEAs. Findings extend the BEA literature to younger participants, early reading interventions, and early reading measures. 相似文献