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   47699篇
  免费   2034篇
  国内免费   22篇
  2020年   515篇
  2019年   643篇
  2018年   881篇
  2017年   902篇
  2016年   921篇
  2015年   674篇
  2014年   804篇
  2013年   3603篇
  2012年   1494篇
  2011年   1640篇
  2010年   962篇
  2009年   927篇
  2008年   1333篇
  2007年   1277篇
  2006年   1191篇
  2005年   1056篇
  2004年   1028篇
  2003年   949篇
  2002年   982篇
  2001年   1605篇
  2000年   1511篇
  1999年   1101篇
  1998年   543篇
  1997年   465篇
  1996年   434篇
  1992年   866篇
  1991年   811篇
  1990年   830篇
  1989年   824篇
  1988年   798篇
  1987年   739篇
  1986年   794篇
  1985年   835篇
  1984年   655篇
  1983年   609篇
  1982年   462篇
  1981年   453篇
  1979年   684篇
  1978年   523篇
  1976年   473篇
  1975年   594篇
  1974年   699篇
  1973年   695篇
  1972年   580篇
  1971年   528篇
  1970年   511篇
  1969年   569篇
  1968年   654篇
  1967年   563篇
  1966年   573篇
排序方式: 共有10000条查询结果,搜索用时 31 毫秒
961.
Female and male children, 67 and 114 months of age, provided ratings of perceived relative competence of male and female stimulus persons who were depicted as engaging in sex-stereotyped professions. Ratings for each of eight occupations were made by allocating 10 plastic chips between the two stimulus persons. After the last trial, children also were asked to recall the occupation last paired with a particular stimulus person. Children at each of three age levels rated as more competent the individual whose sex was consistent with the stereotype for the occupational group presented; the degree of differentiation increased with age. Recall was influenced by the consistency of the stimulus person/occupation pairing with the sex stereotype, but was not related to ratings of competence.A research grant from the University of North Carolina at Charlotte Foundation provided partial support for this research. The authors would like to thank Dr. R. Bruce Irons, principal, and the many teachers at Irwin Open Elementary School who cooperated on this project; William G. Graziano for bringing the chip allocation task to our attention; and Helene A. Hilger for helpful comments.  相似文献   
962.
Reports of learning from 119 participants of 18 general psychodynamic groups from the 1981 and 1982 annual meetings of the Canadian Group Psychotherapy Association were investigated. Two main learning factors emerged from a factor analysis of participant ratings, learning about oneself in a small group (factor one) and learning how to be an effective leader with professional skills (factor two). Participants reported moderate to considerable learning for both factors even though the stated task of the groups did not emphasize the learning of professional skills. Relationships between several classes of variables (group, leader, demographic) and reported learning were studied. Results that were consistent with several previous investigations were found. The discovery of a participant, sex-difference finding, i.e., greater reported learning by the women, generated a number of questions that may be addressed in future investigations.This article was derived from a paper presented at the Fourth Annual Meeting of the Canadian Group Psychotherapy Association, October 27, 1983, Banff, Canada.  相似文献   
963.
Summary The feature-integration model of visual information processing (Treisman & Gelade, 1980) predicts perceptual errors based on the incorrect grouping of stimulus features in multi-element displays. Experiment 1 examined the frequency of such errors with a tachistoscopic bar probe task using letters and novel patterns with a production response. A substantial proportion of the errors did involve figures that were not present in the display but contained combinations of features which had been present. Such errors were especially prominent with novel patterns. The results with letters suggested that such responses were due to guessing, not feature migration, and this was confirmed by Experiment 2. In the second study, responses were collected for single character displays but were scored as if they had been responses to the multielement displays in Experiment 1. The results showed the same high proportion of illusory conjunction errors as the previous results and it was concluded that both results were due to guessing. Spatial confusions in the bar probe task with letters appear to involve whole characters, not character features.This research was supported by grant A-9581 from the National Science and Engineering Council of Canada to the senior author. This research was reported as a paper to the annual meeting of the Canadian Psychological Association, Toronto, 1981. Ian Morrison is now a post-doctoral fellow at the Department of Psychology, Carnegie-Mellon University.  相似文献   
964.
It is proposed that society should re-examine its assumptions about suicide. Rational suicide is viewed as an extension of the right to die. After a review of the legal liability of the psychotherapist and psychiatric facility for both inpatient and outpatient suicide, the author presents an analysis of philosophical, ethical, and psychoanalytic arguments for allowing rational suicide. It is argued that emotional pain should be given more legitimacy as a reason for suicide. The decision to live or to die is argued to best rest with the individual.  相似文献   
965.
Analysis of two chimpanzees' conversations with their teacher during a tool-use training task demonstrated that chimps use lexigrams, a humanly devised visual symbol system, selectively to encode perceived variability; that is, they generally used their symbols to differentiate alternative possibilities or to represent change or novelty in a situation. In contrast, they tended to leave unsaid what was unchanging, repetitive, or the unique possibility in a situation. Perceived variability influenced not only which symbols were selected but also utterance length: A single dimension of variability in a situation leads to single-lexigram utterances; multiple dimensions are associated with multi-lexigram utterances. This pattern of results indicates that the absence of formal grammatical structure in chimp language does not imply that utterances beyond one word in length are either rote strings or imitations. The chimps' tendency to mention the variable while leaving the constant or redundant unsaid is, moreover, strong support for the position that their use of a humanly devised symbol system is more than a series of conditioned responses.  相似文献   
966.
Smokers and nonsmokers were compared on three aspects of academic achievement. Although exactly the same percentage of smokers and nonsmokers passed the first-year university examination, smokers obtained significantly higher marks. Similarly, smokers achieved significantly higher marks in their final year examinations in comparison with nonsmokers. Finally, a comparison of the tutorial essay marks of the smokers and nonsmokers again showed that smokers obtained significantly higher marks than nonsmokers. These data are consistent with the idea that ambitious students adopt smoking in the belief that it will help them study and sustain concentration.  相似文献   
967.
968.
969.
Previous reports of age-of-acquisition effects have been theoretically ambiguous since, in any particular individual, word age-of-acquisition is perfectly correlated with the length of time that a word has been known. The study reported in this article attempted to disentangle effects of word age-of-acquisition and length of word residence time in lexical memory. To this end, words varying in recency-of-introduction to British English were presented in a word-naming task to 46 native speakers whose ages ranged from 20 to 58 years. Using subjects’ ratings of the words on age-of-acquisition, it was possible to assess word residence times and to compare the effects on naming speeds of age-of-acquisition and residence times. Regression analyses indicated that age-of-acquisition was a more important factor than residence time in the word-naming task.  相似文献   
970.
The traditional concept of belief is analyzed and compared with a behavior analytic concept of belief. Beliefs and belief statements are differentiated and relationships between them are examined. The often troublesome inconsistencies in people's beliefs are examined in general and explained, including the phenomena of compartmentalization and repression. Social implications are pursued relative to both punishment for inconsistency in belief and counter-controls thwarting such punishment. The role of teachers in shaping beliefs is analyzed, and appropriate teaching strategies are reviewed.  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