首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   63546篇
  免费   2397篇
  国内免费   31篇
  2019年   750篇
  2018年   1073篇
  2017年   1060篇
  2016年   1121篇
  2015年   794篇
  2014年   952篇
  2013年   5578篇
  2012年   1657篇
  2011年   1771篇
  2010年   1161篇
  2009年   1130篇
  2008年   1650篇
  2007年   1511篇
  2006年   1410篇
  2005年   1193篇
  2004年   1112篇
  2003年   1204篇
  2002年   1105篇
  2001年   2123篇
  2000年   2070篇
  1999年   1543篇
  1998年   707篇
  1996年   712篇
  1995年   689篇
  1994年   697篇
  1993年   656篇
  1992年   1439篇
  1991年   1340篇
  1990年   1331篇
  1989年   1198篇
  1988年   1162篇
  1987年   1168篇
  1986年   1127篇
  1985年   1186篇
  1984年   998篇
  1983年   805篇
  1981年   658篇
  1979年   958篇
  1978年   720篇
  1976年   648篇
  1975年   886篇
  1974年   876篇
  1973年   1001篇
  1972年   868篇
  1971年   761篇
  1970年   703篇
  1969年   689篇
  1968年   854篇
  1967年   741篇
  1966年   775篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
31.
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   
32.
33.
Evaluated the effect of varied physician affect on subject recall, anxiety, and perceptions in a simulated tense and ambiguous medical situation. Forty women at risk for breast cancer viewed videotapes of an oncologist presenting--with either worried or nonworried affect--mammogram results. Although the mammogram results and the oncologist were the same in both presentation, analyses indicated that, compared to the women receiving the results from a nonworried physician, the women receiving the results from a worried physician recalled significantly less information, perceived the clinical situation as significantly more severe, reported significantly higher levels of state anxiety, and had significantly higher pulse rates. These results suggest that physician affect plays a critical role in patient reaction to medical information. Implications for compliance research, patient satisfaction, and physician training are discussed.  相似文献   
34.
The ability of two species of tits to remember the location and/or features of an object was tested in a delayed-matching-to-sample procedure. Three values of retention interval between presentation of the sample stimulus and the choice--30 sec, 5 min, and 15 min--were used. Both species performed at above-chance level at all retention intervals, and there was no significant decline in accuracy with increasing interval. A pool of 100 stimulus objects was used, but the results of control trials indicated that the birds responded primarily to location rather than stimulus features of the object itseif. Although the food-storing marsh tit tended to perform at a higher level than the non-storing great tit, the only significant difference between the species was in the first 50 trials of the first treatment, when the birds were acquiring the task. The results are discussed in relation to the hypothesized special memory capacity of food-storing birds.  相似文献   
35.
Experiment 1 replicated Yaniv and Meyer's (1987) finding that lexical decision and episodic recognition performance was better for words previously yielding high-accessibility levels (a combination of feeling-of-knowing and tip-of-the-tongue ratings) in comparison with those yielding low-accessibility levels in a rare word definition task. Experiment 2 yielded the same pattern even though lexical decisions preceded accessibility estimates by a full week. Experiment 3 dismissed the possibility that the Experiment 2 results may have been due to a long-term influence from the lexical decision task to the rare word judgment task. These results support a model in which Ss (a) retrieve topic familiarity information in making accessibility estimates in the rare word definition task and (b) use this information to modulate lexical decision performance.  相似文献   
36.
37.
38.
39.
40.
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号