全文获取类型
收费全文 | 162802篇 |
免费 | 7494篇 |
国内免费 | 156篇 |
专业分类
170452篇 |
出版年
2021年 | 1499篇 |
2020年 | 2796篇 |
2019年 | 3473篇 |
2018年 | 3431篇 |
2017年 | 3891篇 |
2016年 | 4601篇 |
2015年 | 3985篇 |
2014年 | 4847篇 |
2013年 | 23946篇 |
2012年 | 4304篇 |
2011年 | 3298篇 |
2010年 | 3802篇 |
2009年 | 4791篇 |
2008年 | 3639篇 |
2007年 | 3111篇 |
2006年 | 3859篇 |
2005年 | 3856篇 |
2004年 | 3390篇 |
2003年 | 3023篇 |
2002年 | 2829篇 |
2001年 | 2624篇 |
2000年 | 2469篇 |
1999年 | 2732篇 |
1998年 | 2826篇 |
1997年 | 2675篇 |
1996年 | 2579篇 |
1995年 | 2415篇 |
1994年 | 2389篇 |
1993年 | 2331篇 |
1992年 | 2259篇 |
1991年 | 2110篇 |
1990年 | 1957篇 |
1989年 | 1901篇 |
1988年 | 1865篇 |
1987年 | 1918篇 |
1986年 | 1893篇 |
1985年 | 2130篇 |
1984年 | 2348篇 |
1983年 | 2188篇 |
1982年 | 2339篇 |
1981年 | 2307篇 |
1980年 | 2147篇 |
1979年 | 1940篇 |
1978年 | 2073篇 |
1977年 | 2074篇 |
1976年 | 1862篇 |
1975年 | 1797篇 |
1974年 | 1816篇 |
1973年 | 1647篇 |
1972年 | 1269篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
71.
Corinna S. Martarelli Fred W. Mast 《The British journal of developmental psychology》2011,29(3):425-436
We investigated eye‐movements during preschool children's pictorial recall of seen objects. Thirteen 3‐ to 4‐year‐old children completed a perceptual encoding and a pictorial recall task. First, they were exposed to 16 pictorial objects, which were positioned in one of four distinct areas on the computer screen. Subsequently, they had to recall these pictorial objects from memory in order to respond to specific questions about visual details. We found that children spent more time fixating the areas in which the pictorial objects were previously displayed. We conclude that as early as age 3–4 years old, children show specific eye‐movements when they recall pictorial contents of previously seen objects. 相似文献
72.
73.
74.
75.
76.
77.
78.
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
79.
80.