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   95457篇
  免费   9311篇
  国内免费   3846篇
  108614篇
  2024年   366篇
  2023年   1158篇
  2022年   1380篇
  2021年   903篇
  2020年   1367篇
  2019年   1361篇
  2018年   1671篇
  2017年   859篇
  2016年   955篇
  2015年   792篇
  2014年   2060篇
  2013年   1599篇
  2012年   7878篇
  2011年   9535篇
  2010年   3612篇
  2009年   3048篇
  2008年   8429篇
  2007年   8050篇
  2006年   7389篇
  2005年   6203篇
  2004年   5508篇
  2003年   5102篇
  2002年   4521篇
  2001年   3275篇
  2000年   4182篇
  1999年   1769篇
  1998年   619篇
  1997年   591篇
  1996年   545篇
  1995年   596篇
  1994年   586篇
  1993年   517篇
  1992年   482篇
  1991年   458篇
  1990年   483篇
  1989年   456篇
  1988年   592篇
  1987年   577篇
  1986年   437篇
  1985年   530篇
  1984年   437篇
  1983年   454篇
  1982年   366篇
  1981年   353篇
  1958年   644篇
  1957年   530篇
  1956年   452篇
  1955年   425篇
  1954年   334篇
  1953年   304篇
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
781.
Prasada S  Ferenz K  Haskell T 《Cognition》2002,83(2):141-165
What is the difference between conceiving of an entity as an object of some kind and conceiving of it as an amount of solid stuff? We propose that the difference lies in how one thinks about the entity's structure. Object construals require thinking of the structure as being nonarbitrary, whereas substance construals require thinking of the structure as being arbitrary. We report six experiments that provide empirical support for this proposal. Regularity of structure, repetition of structure, and the existence of structure-dependent functions, all of which provide reasons to consider the structure of an entity to be nonarbitrary, were shown to bias participants towards object construals. We also discuss how the proposed account of what it means to construe an entity as an object or as some stuff can account for a range of findings in the literature on lexical development. These include the relation between cohesiveness and ontological category, shape and ontological category, and complexity of shape and ontological category. Finally, we discuss the nature of construals and the relation of object and substance construals to the physical, design, and intentional stances.  相似文献   
782.
Semantic priming effects are usually obtained only if the prime is presented shortly before the target stimulus. Recent evidence obtained with the so-called false memory paradigm suggests, however, that in both explicit and implicit memory tasks semantic relations between words can result in long-lasting effects when multiple 'primes' are presented. The aim of the present study was to investigate whether these effects would generalize to lexical decision. In four experiments we showed that even as many as 12 primes do not cause long-term semantic priming. In all experiments, however, a repetition priming effect was obtained. The present results are consistent with a number of other results showing that semantic information plays a minimal role in long-term priming in visual word recognition.  相似文献   
783.
Relationships between frequency of computer use or ability to use the computer effectively with the tendency to construct and process visual mental images were investigated by administering a computer-use questionnaire and a visualization questionnaire to a sample of 185 Italian and Spanish undergraduates. Analysis did not support associations between either (a) frequent computer use of any kind or (b) high competence in using the computer for various purposes and spontaneous use of imagery.  相似文献   
784.
The effects of the color of a personal computer screen on work performance, psychological mood, and autonomic response were investigated. 24 subjects were asked to perform visual tasks presented on the computer display. Three types of computer monitor, which were colored red, blue, or beige, were employed to present visual cognitive tasks. The mood measure, the Japanese Stress Arousal Check List, and heart rate measurement were administered before and after work on each color of computer monitor. Analysis of a low-demand task (Exp. 1) showed that the red computer monitor reduced visual task performance compared to that with the blue, while the blue monitor decreased visual task performance on a high-demand task (Exp. 2). The color of the monitor did not affect mood or heart rate. Based on these findings, the effect of the color of environmental cues on work was discussed.  相似文献   
785.
This paper discusses several factors affecting the development of children prenatally exposed to drugs. In the "first generation" of research in this field a main factor model of disease formed the basis for a belief in the feasibility of detecting the direct pharmacological or teratogenic effects of drug exposure on long-term child development. However, the clustering of confounding variables has constituted a major problem in identifying these effects. In the last few years a "second generation" of research in this field has emerged, and investigators have moved beyond simple main-effect models. The importance of controlling for confounding variables has been underscored. However, prenatal substance exposure is still often studied within a teratology model where the main goal is the search for unique effects of a specific drug or substance. Based on this review it is suggested that an appropriate model for understanding the development of drug-exposed children cannot be based on a main-effect perspective. Rather, such a model must evolve from a contextual perspective, and it is suggested that a transactional model, where both potential risk factors and protective factors are considered, should replace the traditional teratology model in this field.  相似文献   
786.
This study based on in-depth interviews of 25 parents of violent children and a control group of 25 parents of nonviolent children concerned the parents' personalities. Parents were between 22 and 48 years of age and were from middle and lower middle socioeconomic backgrounds. Differences in classification by the nonblinded interviewers of parents into the two groups on six behavior characteristics were significant on chi2 tests. Some recommendations are made for further research.  相似文献   
787.
We hypothesized that semester goal attainment provides a route to short-term psychological growth. In an attempt to enhance this process, we randomly assigned participants to either a goal-training program or to a control condition. Although there were no main effects of program participation on later goal attainment, important interactions were found. Consistent with a "prepared to benefit" model, participants already high in goal-based measures of personality integration perceived the program as most useful and benefited the most from the program in terms of goal attainment. As a result, they became even more integrated and also increased in their levels of psychosocial well-being and vitality. Implications for theories of short-term growth and positive change are discussed, as is the unanswered question of how to help less-integrated persons grow.  相似文献   
788.
Gender is a dimension of face recognition   总被引:1,自引:0,他引:1  
In an experiment, the authors investigated the impact of gender categorization on face recognition. Participants were familiarized with composite androgynous faces labeled with either a woman's first name (Mary) or a man's first name (John). The results indicated that participants more quickly eliminated faces of the opposite gender than faces of the same gender than the face they were looking for. This gender effect did not result from greater similarity between faces of the same gender. Rather, early gender categorization of a face during face recognition appears to speed up the comparison process between the perceptual input and the facial representation. Implications for face recognition models are discussed.  相似文献   
789.
The authors examined the roles of self-esteem and perceived social support in moderating the relationship between dual social expectations (instrumentality and expressivity) and well-being. Participants were 166 female and 87 male students in an urban community in the midwestern United States. After the authors controlled for the main effects of instrumental and expressive expectations, social support, as predicted, moderated the relationship between dual expectations and well-being: With higher levels of social support, higher levels of dual expectations were associated with higher levels of well-being; with lower levels of social support, higher levels of dual expectations were associated with lower levels of well-being. Contrary to predictions, however, self-esteem did not moderate the relation between dual expectations and well-being. The discussion focuses on the importance of social resources in enhancing the potential benefits of dual expectations in interpersonal contexts.  相似文献   
790.
The authors hypothesized that the relationship between conscientiousness and job performance would be stronger for persons high in agreeableness than for those low in agreeableness. Results of hierarchical moderated regression analyses for 7 independent samples of employees across diverse occupations provided support for the hypothesis in 5 of the samples. In samples supporting the hypothesis, among the highly conscientious workers, those low in agreeableness were found to receive lower ratings of job performance than workers high in agreeableness. One explanation for lack of an interaction between conscientiousness and agreeableness in the other 2 samples is that those jobs were not characterized by frequent, cooperative interactions with others. Overall, the results show that highly conscientious workers who lack interpersonal sensitivity may be ineffective, particularly in jobs requiring cooperative interchange with others.  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