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   62892篇
  免费   3158篇
  国内免费   52篇
  2020年   622篇
  2019年   778篇
  2018年   1075篇
  2017年   1111篇
  2016年   1164篇
  2015年   856篇
  2014年   999篇
  2013年   4660篇
  2012年   1889篇
  2011年   2037篇
  2010年   1324篇
  2009年   1378篇
  2008年   1819篇
  2007年   1864篇
  2006年   1642篇
  2005年   1469篇
  2004年   1370篇
  2003年   1283篇
  2002年   1368篇
  2001年   2097篇
  2000年   2013篇
  1999年   1553篇
  1998年   746篇
  1997年   656篇
  1996年   683篇
  1995年   595篇
  1993年   606篇
  1992年   1307篇
  1991年   1211篇
  1990年   1201篇
  1989年   1102篇
  1988年   1064篇
  1987年   1022篇
  1986年   1081篇
  1985年   1081篇
  1984年   914篇
  1983年   817篇
  1982年   586篇
  1979年   962篇
  1978年   680篇
  1975年   781篇
  1974年   846篇
  1973年   946篇
  1972年   810篇
  1971年   768篇
  1970年   678篇
  1969年   695篇
  1968年   906篇
  1967年   815篇
  1966年   700篇
排序方式: 共有10000条查询结果,搜索用时 135 毫秒
761.
Memory research has in the last fifteen years been marked by a considerable interest in context effects. This review begins by examining experimental manipulations of verbal and environmental context in verbal memory. This is followed by a more extensive review of episodic studies of face recognition that have examined the effects of varying the background in which a face is portrayed, the room of testing, and the presence of guided instructions. The relevance of these findings to eyewitness memory is also considered. Discrepancies in the literature are pinpointed with theoretical discussion centering around encoding specificity theory (Tulving & Thomson, 1973) and Baddeley and Woodhead’s (1982) distinction between “independent” (extrinsic) and “interactive” (intrinsic) context effects. The review ends with an evaluation of some recent models of memory and face recognition in an attempt to provide a framework within which to interpret the context effects in the literature.  相似文献   
762.
763.
Sternheim and Boynton’s (1966) continuous judgmental color-naming technique was used to assess the elemental nature of achromatic colors. Results from three subjects indicate that the names “black” and “white” are necessary and sufficient to describe achromatic test lights associated with the name “gray.” On the basis of the criteria that establishes a color as elemental, black and white were confirmed as elemental, whereas gray was not. These findings support the assumption of various opponent processing models that there are only two elemental achromatic sensations. In addition, the results support Hering’s (1920) view that black and white differ from the paired-chromatic opponent colors in that they are not mutually exclusive.  相似文献   
764.
Two experiments investigated infants’ sensitivity to familiar size as information for the distances of objects with which they had had only brief experience. Each experiment had two phases: a familiarization phase and a test phase. During the familiarization phase, the infant played with a pair of different-sized objects for 10 min. During the test phase, a pair of objects, identical to those seen in the familiarization phase but now equal in size, were presented to the infant at a fixed distance under monocular or binocular viewing conditions. In the test phase of Experiment 1, 7-month-old infants viewing the objects monocularly showed a significant preference to reach for the object that resembled the smaller object in the familiarization phase. Seven-month-old infants in the binocular viewing condition reached equally to the two test phase objects. These results indicate that, in the monocular condition, the 7-month-olds used knowledge about the objects’ sizes, acquired during the familiarization phase, to perceive distance from the test objects’ visual angles, and that they reached preferentially for the apparently nearer object. The lack of a reaching preference in the binocular condition rules out interpretations of the results not based on the objects’ perceived distances. The results, therefore, indicate that 7-month-old infants can use memory to mediate spatial perception. The implications of this finding for the debate between direct and indirect theories of visual perception are discussed. In the test phase of Experiment 2,5-month-old infants viewing the objects monocularly showed no reaching preference. These infants, therefore, showed no evidence of sensitivity to familiar size as distance information.  相似文献   
765.
766.
767.
A small informal poll of local colleagues revealed that despite their interest in the subject, many had doubts about the possibility of analyzing persons aged sixty or over successfully. Their specific questions are collated and are offered as a sample of the questions in the minds of many analysts everywhere. Selected material from the ongoing analysis of a sixty-four-year-old patient is presented that bears on some of the questions raised. In addition, changes in the patient are noted. These are discussed in terms of changes in function, which are equated with structural change. The major thrust of the paper is that development continues throughout the life course, and that the criteria for analyzability remain constant. The chronological age of the adult by itself is not an indicator of eligibility or of suitability for psychoanalysis.  相似文献   
768.
769.
770.
Dieting and binging. A causal analysis   总被引:16,自引:0,他引:16  
  相似文献   
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