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   63395篇
  免费   2382篇
  国内免费   29篇
  2019年   743篇
  2018年   1052篇
  2017年   1055篇
  2016年   1103篇
  2015年   787篇
  2014年   949篇
  2013年   5568篇
  2012年   1641篇
  2011年   1763篇
  2010年   1154篇
  2009年   1122篇
  2008年   1647篇
  2007年   1502篇
  2006年   1404篇
  2005年   1186篇
  2004年   1110篇
  2003年   1201篇
  2002年   1104篇
  2001年   2119篇
  2000年   2072篇
  1999年   1543篇
  1998年   701篇
  1996年   712篇
  1995年   688篇
  1994年   697篇
  1993年   659篇
  1992年   1440篇
  1991年   1340篇
  1990年   1330篇
  1989年   1196篇
  1988年   1161篇
  1987年   1165篇
  1986年   1127篇
  1985年   1186篇
  1984年   996篇
  1983年   806篇
  1981年   658篇
  1979年   959篇
  1978年   719篇
  1976年   649篇
  1975年   887篇
  1974年   876篇
  1973年   1001篇
  1972年   868篇
  1971年   760篇
  1970年   703篇
  1969年   691篇
  1968年   855篇
  1967年   741篇
  1966年   777篇
排序方式: 共有10000条查询结果,搜索用时 0 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