全文获取类型
收费全文 | 67792篇 |
免费 | 2814篇 |
国内免费 | 20篇 |
专业分类
70626篇 |
出版年
2020年 | 669篇 |
2019年 | 870篇 |
2018年 | 1184篇 |
2017年 | 1195篇 |
2016年 | 1284篇 |
2015年 | 930篇 |
2014年 | 1098篇 |
2013年 | 5013篇 |
2012年 | 2018篇 |
2011年 | 2197篇 |
2010年 | 1363篇 |
2009年 | 1311篇 |
2008年 | 1923篇 |
2007年 | 1914篇 |
2006年 | 1762篇 |
2005年 | 1538篇 |
2004年 | 1429篇 |
2003年 | 1338篇 |
2002年 | 1450篇 |
2001年 | 2238篇 |
2000年 | 2188篇 |
1999年 | 1652篇 |
1998年 | 765篇 |
1997年 | 669篇 |
1996年 | 682篇 |
1993年 | 621篇 |
1992年 | 1378篇 |
1991年 | 1292篇 |
1990年 | 1277篇 |
1989年 | 1165篇 |
1988年 | 1147篇 |
1987年 | 1101篇 |
1986年 | 1163篇 |
1985年 | 1172篇 |
1984年 | 998篇 |
1983年 | 888篇 |
1982年 | 653篇 |
1981年 | 633篇 |
1979年 | 1043篇 |
1978年 | 740篇 |
1975年 | 862篇 |
1974年 | 936篇 |
1973年 | 1047篇 |
1972年 | 869篇 |
1971年 | 828篇 |
1970年 | 742篇 |
1969年 | 766篇 |
1968年 | 982篇 |
1967年 | 882篇 |
1966年 | 760篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
11.
12.
13.
14.
15.
16.
Leigh M. Riby Timothy J. Perfect Brian T. Stollery 《The Quarterly Journal of Experimental Psychology Section A: Human Experimental Psychology》2004,57(2):241-267
Previous research demonstrates that older adults are poor at dual tasking, but there is less agreement on whether their decrement is worse than that predicted from single-task performance. This study investigated whether task domain moderates dual-task costs in old age. In two experiments, young and older adults retrieved either previously learned associates (episodic retrieval) or overlearned category members (semantic retrieval) under single or working-memory load conditions, using cued recall (Experiment 1) and recognition (Experiment 2) procedures. In both experiments the proportional costs of dual tasking were age invariant for semantic retrieval but were particularly marked for episodic retrieval, although the size of the age effect was reduced in recognition compared to cued recall. The data suggest that age effects in dual tasking may be domain specific. 相似文献
17.
The intuition that we have privileged and unrestricted access to ourselves – that we inevitably know who we are, how we feel, what we do, and what we think – is very compelling. Here, we review three types of evidence about the accuracy of self-perceptions of personality and conclude that the glass is neither full nor empty. First, studies comparing self-perceptions of personality to objective criteria suggest that self-perceptions are at least tethered to reality – people are not completely clueless about how they behave, but they are also far from perfect. Second, studies examining how well people’s self-perceptions agree with others’ perceptions of them suggest that people’s self-views are not completely out of synch with how they are seen by those who know them best, but they are also far from identical. Third, studies examining whether people know the impressions they make on others suggest that people do have some glimmer of insight into the fact that others see them differently than they see themselves but there is still a great deal people do not know about how others see them. The findings from all three approaches point to the conclusion that self-knowledge exists but leaves something to be desired. The status of people’s self-knowledge about their own personality has vast implications both for our conception of ourselves as rational agents and for the methods of psychological inquiry. 相似文献
18.
19.
20.
Michael J. Kelley 《The Quarterly Journal of Experimental Psychology Section B: Comparative and Physiological Psychology》1986,38(1):97-110
The study supplies further evidence that non-associative effects and temporal-spatial similarities between certain combinations of cue and consequence cannot explain all instances of stimulus-reinforcer interactions. Pigeons were trained to press a treadle in the presence of a discriminative compound stimulus either to avoid shock or to obtain a food reinforcer. The compound stimulus was composed of diffuse tone and light cues which had identical temporal patterns of onset, duration and offset. With the avoidance schedule the auditory cue acquired more control than the visual cue; however, when food was the reinforcer, the visual cue exerted more control. This pattern of stimulus control on the appetitive schedule did not change if random shocks were also added, even though these shocks were equal in density to the food presentations and equal in magnitude to those used for the avoidance schedule. Other changes in the appetitive procedure, such as making the tone spatially contiguous with food and removing the light in the food hopper, also failed to alter the relative control by the different cues. Prior training with a food reinforcer did not produce any change in the relative control by the two cues when the birds were retrained on the shock-avoidance schedule. The results suggest that some frequently stated alternatives to selective associability are not adequate explanations of this instance of a stimulus-reinforcer interaction. 相似文献