全文获取类型
收费全文 | 4430篇 |
免费 | 129篇 |
国内免费 | 3篇 |
专业分类
4562篇 |
出版年
2022年 | 42篇 |
2021年 | 54篇 |
2020年 | 82篇 |
2019年 | 81篇 |
2018年 | 157篇 |
2017年 | 139篇 |
2016年 | 139篇 |
2015年 | 79篇 |
2014年 | 90篇 |
2013年 | 369篇 |
2012年 | 150篇 |
2011年 | 125篇 |
2010年 | 86篇 |
2009年 | 108篇 |
2008年 | 115篇 |
2007年 | 121篇 |
2006年 | 100篇 |
2005年 | 90篇 |
2004年 | 79篇 |
2003年 | 62篇 |
2002年 | 59篇 |
2001年 | 129篇 |
2000年 | 96篇 |
1999年 | 81篇 |
1997年 | 39篇 |
1996年 | 40篇 |
1993年 | 48篇 |
1992年 | 62篇 |
1991年 | 71篇 |
1990年 | 60篇 |
1989年 | 57篇 |
1988年 | 63篇 |
1987年 | 57篇 |
1986年 | 50篇 |
1985年 | 60篇 |
1984年 | 58篇 |
1983年 | 46篇 |
1982年 | 52篇 |
1979年 | 58篇 |
1978年 | 58篇 |
1977年 | 51篇 |
1976年 | 45篇 |
1975年 | 65篇 |
1974年 | 60篇 |
1973年 | 56篇 |
1972年 | 50篇 |
1971年 | 53篇 |
1968年 | 50篇 |
1967年 | 60篇 |
1966年 | 43篇 |
排序方式: 共有4562条查询结果,搜索用时 15 毫秒
871.
S C Heaton S K Reader A S Preston E B Fennell O E Puyana N Gill J H Johnson 《Child neuropsychology》2001,7(4):251-264
The present study explores the utility of the Test of Everyday Attention for Children (TEA-Ch) as a measure of the attentional impairments displayed by children with Attention Deficit Hyperactivity Disorder (ADHD). Sixty-three children with ADHD and 23 non-ADHD Clinical Control children were compared on subtests of the TEA-Ch reflecting three attentional domains: sustained, selective, and attentional control. Results show that children with ADHD performed significantly worse than clinical controls on subtests of sustained attention and attentional control. The groups did not differ, however, on subtests of selective attention. These findings suggest that the TEA-Ch is sensitive to attentional deficits unique to ADHD and holds promise as a useful tool in the assessment of ADHD. Performance patterns and future directions are discussed. 相似文献
872.
How does attention influence the judged duration of a brief stimulus? In the four experiments reported here, we show that the effect of spatial attention on duration judgment depends on the processing demand of the concurrent nontemporal task. When participants had to perform a speeded letter discrimination task in addition to duration rating, the judged duration was longer at a cued location than at an uncued location, regardless of whether the cue was exogenous or endogenous. However, when the same stimuli were presented but no concurrent nontemporal task was required, duration was judged to be shorter at the cued location, as compared with the uncued locations. Furthermore, although spatial attention influenced duration judgment, no object-based attentional effects were found. These findings suggest that, although spatial attention plays an important role in the judged duration of a briefly presented stimulus, its effect is mediated by the processing demand of the task. 相似文献
873.
Brain damage may doubly dissociate cognitive modules, but the practice of revealing dissociations is predicated on modularity being true (T. Shallice, 1988). This article questions the utility of assuming modularity, as it examines a paradigmatic double dissociation of reading modules. Reading modules illustrate two general problems. First, modularity fails to converge on a fixed set of exclusionary criteria that define pure cases. As a consequence, competing modular theories force perennial quests for purer cases, which simply perpetuates growth in the list of exclusionary criteria. The first problem leads, in part, to the second problem. Modularity fails to converge on a fixed set of pure cases. The second failure perpetuates unending fractionation into more modules. 相似文献
874.
The Internet offers possibilities for sexuality research that could not have been imagined even a decade ago. Although Internet
users are not representative of the general population, they are easily accessible, and the openness with which they discuss
sensitive topics has created a tremendous and largely untapped pool of respondents for sex research. Moreover, the web provides
access to populations that are largely hidden and difficult to reach using traditional methods. In this article, we explore
such issues as sampling, research design, data collection and management, and the ethics of web-based research. In doing so,
we review past research, investigate the advantages and disadvantages of using the Internet in sexuality studies, draw examples
from our web-based study of involuntary celibacy, and recommend guidelines for future web based inquiries. 相似文献
875.
876.
877.
878.
879.
880.