全文获取类型
收费全文 | 643篇 |
免费 | 10篇 |
专业分类
653篇 |
出版年
2020年 | 5篇 |
2019年 | 9篇 |
2018年 | 10篇 |
2017年 | 10篇 |
2016年 | 15篇 |
2015年 | 5篇 |
2014年 | 7篇 |
2013年 | 78篇 |
2012年 | 15篇 |
2011年 | 17篇 |
2010年 | 15篇 |
2009年 | 18篇 |
2008年 | 19篇 |
2007年 | 13篇 |
2006年 | 30篇 |
2005年 | 20篇 |
2004年 | 24篇 |
2003年 | 23篇 |
2002年 | 18篇 |
2001年 | 13篇 |
2000年 | 18篇 |
1999年 | 9篇 |
1998年 | 8篇 |
1997年 | 7篇 |
1996年 | 9篇 |
1995年 | 11篇 |
1994年 | 9篇 |
1993年 | 10篇 |
1992年 | 9篇 |
1991年 | 8篇 |
1990年 | 13篇 |
1989年 | 10篇 |
1988年 | 11篇 |
1987年 | 13篇 |
1986年 | 6篇 |
1985年 | 5篇 |
1984年 | 9篇 |
1983年 | 7篇 |
1982年 | 4篇 |
1981年 | 6篇 |
1980年 | 9篇 |
1979年 | 6篇 |
1978年 | 10篇 |
1977年 | 8篇 |
1976年 | 9篇 |
1975年 | 5篇 |
1974年 | 8篇 |
1972年 | 4篇 |
1971年 | 9篇 |
1968年 | 5篇 |
排序方式: 共有653条查询结果,搜索用时 7 毫秒
191.
This study aimed at investigating the relationship between hours of homework, stress, and mood disturbance in senior high school students, 141 boys and 228 girls, recruited from high schools across Victoria, Australia. Participants' ages ranged from 16 to 18 years (M = 16.6, SD = .6). A 1-wk. homework diary, a Self-reported Stress scale, and the Profile of Mood States were administered to students. Analysis showed that the number of hours spent completing homework ranged from 10 to 65 hours per week (M = 37.0, SD = 12.2). Independent samples t-test analyses showed significant sex differences, with female students scoring higher on hours of homework, stress, and mood disturbance compared to male students. Pearson product-moment correlations were significant and positive for hours of homework with stress and for hours of homework with mood disturbance. 相似文献
192.
193.
Kennedy D 《The American journal of bioethics : AJOB》2005,5(2):19; discussion W3-19; discussion W4
194.
Social interaction interventions for youth with severe disabilities should emphasize interdependence
An emphasis on independence may be limiting the outcomes achieved by social interaction research. Given the lack of correlation between intellectual or adaptive functioning level and meaningful social outcomes for people with severe disabilities, a focus on increasing skills as a mechanism for increasing social outcomes seems misplaced (or, at least, inefficient). It is argued here that a more productive route for researchers to follow will be to emphasize interdependence. Implications of such a focus will change where interventions are implemented, curricular foci, and the types of instructional strategies used to improve the social life of youth with severe disabilities. MRDD Research Reviews 7:122-127, 2001. 相似文献
195.
Hugh C. Hendrie 《Current directions in psychological science》2001,10(3):98-101
Advances in molecular genetics have revolutionized epidemiological research. It is now possible to combine the techniques of population genetics with research on risk factors to construct genetic-environmental interactive models that explain geographic-ethnic variations in disease rates. Cross-cultural studies involving populations from developing and developed countries offer a unique opportunity for constructing these models by providing a wide diversity of environmental exposures. Results from a comparative Indianapolis-Ibadan study suggest that Alzheimer’s disease incidence rates are lower in Yoruba than in African Americans and that these lower rates may be due to a combination of genetic and environmental, primarily dietary, influences. 相似文献
196.
The Internet as a popular media is not even one decade old. From its early days of wide access, concern with the dangers posed
to children and teens has been a staple of news media and moral entrepreneurs. Concern with sexual predators, “cyberporn”
(or “pornographic” material housed on “nodes” of the World Wide Web) became media-induced moral panics of the mid- and late-1990s.
This paper examined the Internet and children in the context of the United States and Australia. Studies of children’s access
to the Internet and it’s effects were examined. Particular attention was paid to the aspects of Internet danger as a form
of “urban legend” aimed at middle-class parents who are able to provide access to the technology required to access the “dangers”
of the Web. The intersection of urban mythology, technological change, and morals campaigns of the 1990s was explored. The
role played by concern with the Internet in the on-going history of moral movements and parental responsibility was discussed. 相似文献
197.
198.
Generating solutions to anagrams leads to a memory advantage for those solutions, with generated words remembered better than words simply read. However, an additional advantage is not typically found for solutions to difficult anagrams relative to solutions to easy ones, presenting a challenge for the cognitive effort explanation of the generation effect. In the present series of experiments, the effect of manipulating anagram difficulty is explored further by introducing two new source-monitoring judgments. These studies demonstrate that when attention is directed at test to the operations activated during encoding (by way of source-monitoring judgments focused on solving vs. constructing anagrams), a source advantage is observed for difficult anagrams. However, when attention is directed to the anagrams themselves, asking participants to remember the kinds of anagrams generated or solved (based on kind of rule rather than subjective impressions of difficulty), a similar source advantage is not observed. The present studies bring a new perspective to the investigation of difficulty manipulations on memory for problem solving by illustrating the impact of a shift in focus from the effort mediating cognitive operations to specifics about the cognitive operations themselves. 相似文献
199.
Hester R Barre N Mattingley JB Foxe JJ Garavan H 《Cognitive, affective & behavioral neuroscience》2007,7(4):317-326
The magnitude of posterior medial frontal cortex (pMFC) activity during commission of an error has been shown to relate to adaptive posterror changes in response behavior on the trial immediately following. In the present article, we examined neural activity during and after error commission to identify its relationship to sustained posterror behavior changes that led to performance improvements several trials into the future. The standard task required participants to inhibit a prepotent motor response during infrequent lure trials, which were randomly interspersed among numerous go trials. Posterror behavior was manipulated by introducing a dynamic condition, in which an error on a lure trial ensured that the next lure would appear within two to seven go trials. Behavioral data indicated significantly higher levels of posterror slowing and accuracy during the dynamic condition, as well as fewer consecutive lure errors. Bilateral prefrontal cortex (PFC) and pMFC activity during the posterror period, but not during commission of the error itself, was associated with increased posterror slowing. Activity within two of these regions (right PFC and pMFC) also predicted success on the next lure trial. The findings support a relationship between pMFC/PFC activity and adaptive posterror behavior change, and the discrepancy between these findings and those of previous studies-in the present study, this relationship was detected during the posterror period rather than during commission of the error itself--may have resulted from the requirements of the present task. Implications of this discrepancy for the flexibility of cognitive control are discussed. 相似文献
200.