全文获取类型
收费全文 | 38912篇 |
免费 | 827篇 |
国内免费 | 4篇 |
专业分类
39743篇 |
出版年
2020年 | 238篇 |
2019年 | 286篇 |
2018年 | 3808篇 |
2017年 | 3150篇 |
2016年 | 2634篇 |
2015年 | 509篇 |
2014年 | 461篇 |
2013年 | 1746篇 |
2012年 | 1175篇 |
2011年 | 3004篇 |
2010年 | 2901篇 |
2009年 | 1845篇 |
2008年 | 2270篇 |
2007年 | 2676篇 |
2006年 | 543篇 |
2005年 | 664篇 |
2004年 | 616篇 |
2003年 | 511篇 |
2002年 | 532篇 |
2001年 | 544篇 |
2000年 | 533篇 |
1999年 | 405篇 |
1998年 | 256篇 |
1997年 | 217篇 |
1996年 | 211篇 |
1995年 | 221篇 |
1994年 | 188篇 |
1993年 | 187篇 |
1992年 | 313篇 |
1991年 | 313篇 |
1990年 | 294篇 |
1989年 | 283篇 |
1988年 | 268篇 |
1987年 | 247篇 |
1986年 | 238篇 |
1985年 | 254篇 |
1984年 | 259篇 |
1983年 | 233篇 |
1982年 | 224篇 |
1981年 | 229篇 |
1980年 | 189篇 |
1979年 | 269篇 |
1978年 | 217篇 |
1977年 | 207篇 |
1976年 | 193篇 |
1975年 | 237篇 |
1974年 | 261篇 |
1973年 | 244篇 |
1972年 | 214篇 |
1968年 | 222篇 |
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
961.
962.
963.
964.
Moshe Naveh-Benjamin Fergus I. M. Craik James G. Perretta Simon T. Tonev 《The Quarterly Journal of Experimental Psychology Section A: Human Experimental Psychology》2000,53(3):609-625
We have recently cast doubt (Craik, Govoni, Naveh-Benjamin, & Anderson, 1996; Naveh-Benjamin, Craik, Guez, & Dori, 1998) on the view that encoding and retrieval processes in human memory are similar. Divided attention at encoding was shown to reduce memory performance significantly, whereas divided attention at retrieval affected memory performance only minimally. In this article we examined this asymmetry further by using more difficult retrieval tasks, which require substantial effort. In one experiment, subjects had to encode and retrieve lists of unfamiliar name-nouns combinations attached to people's photographs, and in the other, subjects had to encode words that were either strong or weak associates of the cues presented with them and then to retrieve those words with either intra- or extra-list cues. The results of both experiments showed that unlike division of attention at encoding, which reduces memory performance markedly, division of attention at retrieval has almost no effect on memory performance, but was accompanied by an increase in secondary-task cost. Such findings again illustrated the resiliency of retrieval processes to manipulations involving the withdrawal of attention. We contend that retrieval processes are obligatory or protected, but that they require attentional resources for their execution. 相似文献
965.
966.
967.
James Alcock 《World Futures: Journal of General Evolution》2013,69(3-4):189-200
Our ability to survive in a world beset by looming global perils depends ultimately on our collective will to harness our intellects and change our behaviors. In order to respond appropriately, people must first believe that serious problems exist, that there are potential solutions, and that they have a role to play in finding and implementing them. Without such beliefs, individual change is unlikely. In order to promote belief change, it is important to understand how beliefs are learned, what their functions are, and why they are so often resistant to change. These issues are discussed in this article, along with the role that social dilemmas play in inhibiting individually prosocial behavior. 相似文献
968.
969.
D. N. Lee D. S. Young P. E. Reddish S. Lough T. M. H. Clayton 《The Quarterly Journal of Experimental Psychology Section A: Human Experimental Psychology》1983,35(2):333-346
To investigate the timing of actions relative to events in the environment, we observed subjects leaping to punch a falling ball. We analysed their knee and elbow angles as functions of time for three ball-drop heights, finding that the differences in the functions for the different heights could be explained on the basis that the subjects were gearing their actions to a particular optic variable. This variable specifies the time remaining before contact with an object if the closing velocity is constant; for the falling ball it gives an increasingly accurate estimate of the time-to-contact. Our visuo-moto control model incorporates a delay parameter, the value of which was estimated from the data. In addition, correlations indicated that the knee and elbow were generally quite tightly coupled. The relationship of this task to laboratory tracking tasks and to the timing of actions in everyday life is described. 相似文献
970.
This article describes a structured group program called Depression Management Training (DMT), the focus of which is to increase participants' awareness of the multidimentional sources of depression and to enhance their coping strategies. 相似文献