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   2760篇
  免费   149篇
  2909篇
  2024年   8篇
  2023年   45篇
  2022年   37篇
  2021年   59篇
  2020年   86篇
  2019年   70篇
  2018年   146篇
  2017年   145篇
  2016年   132篇
  2015年   79篇
  2014年   103篇
  2013年   347篇
  2012年   213篇
  2011年   248篇
  2010年   135篇
  2009年   48篇
  2008年   206篇
  2007年   146篇
  2006年   155篇
  2005年   71篇
  2004年   67篇
  2003年   56篇
  2002年   44篇
  2001年   20篇
  2000年   29篇
  1999年   19篇
  1998年   14篇
  1997年   18篇
  1996年   9篇
  1994年   10篇
  1993年   13篇
  1992年   11篇
  1991年   6篇
  1990年   14篇
  1989年   9篇
  1988年   8篇
  1987年   6篇
  1986年   3篇
  1985年   7篇
  1984年   9篇
  1983年   4篇
  1981年   4篇
  1980年   5篇
  1979年   8篇
  1978年   3篇
  1976年   5篇
  1974年   4篇
  1973年   4篇
  1971年   3篇
  1966年   3篇
排序方式: 共有2909条查询结果,搜索用时 0 毫秒
991.
Previous studies have demonstrated that humans have a remarkable capacity to memorise a large number of scenes. The research on memorability has shown that memory performance can be predicted by the content of an image. We explored how remembering an image is affected by the image properties within the context of the reference set, including the extent to which it is different from its neighbours (image-space sparseness) and if it belongs to the same category as its neighbours (uniformity). We used a reference set of 2,048 scenes (64 categories), evaluated pairwise scene similarity using deep features from a pretrained convolutional neural network (CNN), and calculated the image-space sparseness and uniformity for each image. We ran three memory experiments, varying the memory workload with experiment length and colour/greyscale presentation. We measured the sensitivity and criterion value changes as a function of image-space sparseness and uniformity. Across all three experiments, we found separate effects of 1) sparseness on memory sensitivity, and 2) uniformity on the recognition criterion. People better remembered (and correctly rejected) images that were more separated from others. People tended to make more false alarms and fewer miss errors in images from categorically uniform portions of the image-space. We propose that both image-space properties affect human decisions when recognising images. Additionally, we found that colour presentation did not yield better memory performance over grayscale images.  相似文献   
992.
Research suggests that promoting adaptive approaches to learning early in childhood may help close the gap between advantaged and disadvantaged children. Recent research has identified specific child-level and classroom-level variables that are significantly associated with preschoolers' approaches to learning. However, further research is needed to understand the interactive effects of these variables and determine whether classroom-level variables buffer the detrimental effects of child-level risk variables. Using a largely urban and minority sample (N = 275) of preschool children, the present study examined the additive and interactive effects of children's context-specific problem behaviors and classroom process quality dimensions on children's approaches to learning. Teachers rated children's problem behavior and approaches to learning and independent assessors conducted classroom observations to assess process quality. Problem behaviors in structured learning situations and in peer and teacher interactions were found to negatively predict variance in approaches to learning. Classroom process quality domains did not independently predict variance in approaches to learning. Nonetheless, classroom process quality played an important role in these associations; high emotional support buffered the detrimental effects of problem behavior, whereas high instructional support exacerbated them. The findings of this study have important implications for classroom practices aimed at helping children who exhibit problem behaviors.  相似文献   
993.
The main aim of this study was to analyze the relationship between the amount of physical activity and academic performance in 3rd-year secondary education students. The sample was taken from three secondary schools in the area of Barcelona. 284 students (158 girls, 126 boys) with an average age of 14.7 yr. participated. The International Physical Activity Questionnaire was used by students to self-report their amount of physical activity. Students' academic records were obtained for comparisons. Results showed that there was a linear relationship between academic performance and physical activity; nevertheless, there was a trend to stronger correlation when modeling the relationship between these variables with a quadratic equation. Further research should focus on whether academic performance and physical activity might be better explained with a second-order equation.  相似文献   
994.
An analysis of psychological well-being (self-esteem and subjective vitality) of 639 Spanish university students was performed, while accounting for the amount of leisure-time physical activity. The Spanish versions of the Rosenberg Self-Esteem Scale and Subjective Vitality Scale were employed. Participants were divided into four groups (Low, Moderate, High, and Very high) depending on estimation of energy expenditure in leisure-time physical activity. Men and women having higher physical activity rated higher mean subjective vitality; however, differences in self-esteem were observed only in men, specifically between Very high and the other physical activity groups.  相似文献   
995.
The reliability and factor structure of the Spanish version of the Object-Spatial Imagery and Verbal Questionnaire (OSIVQ) were assessed in a sample of 213 Spanish university graduates. The questionnaire measures three types of processing preferences (verbal, object imagery, and spatial imagery). Principal components analysis with varimax rotation identified three factors, corresponding to the three scales proposed in the original version, explaining 33.1% of the overall variance. Cronbach's alphas were .72, .77, and .81 for the verbal, object imagery, and spatial imagery scales, respectively.  相似文献   
996.
We defend the view that defines the rigidity of general terms as sameness of designated universal across possible worlds from the objection that such a characterization is incapable of distinguishing rigid from non-rigid readings of general terms and, thus, that it trivializes the notion of rigidity. We also argue that previous attempts to offer a solution to the trivialization problem do no succeed.  相似文献   
997.
Interest is growing in community psychology to look more closely at culture. Culture has resided in community psychology in its emphasis on context, ecology, and diversity, however we believe that the field will benefit from a more explicit focus on culture. We suggest a cultural approach that values the community's points of view and an understanding of shared and divergent meanings, goals, and norms within a theory of empowerment. Furthermore, we posit the importance of pluralistic, multi-method programs of research and action encompassing both idiographic and nomothetic approaches, and critical reflexivity of our roles and agendas. Culture can be further incorporated into all the branches and fibers of community psychology.  相似文献   
998.
999.
One of the main difficulties in the study of emotion is the induction of a real emotional response by means of artificial techniques. The aim of the current study is to validate the Spanish version of a set of films with the capacity to induce emotions (PIE) under laboratory conditions and to analyze its capacity to provoke differentiated basic emotions. A sample of 127 subjects took part in the study; 57 excerpts of Spanish-dubbed films with capacity in previous studies to induce 7 emotions: anger, fear, sadness, disgust, amusement, tenderness, and neutral emotion were used. Subjective emotional response was measured using the Self-Assessment Manikins and the Discrete Emotions Questionnaire. Films included showed a good capacity to induce positive and negative affects, high levels of emotional activation and variations in the perception of emotional control. They induced basic emotions of amusement and fear in a differentiated way. However, sadness and disgust could not be significantly differentiated from anger; or anger and tenderness from sadness. The PIE could be a useful tool for the experimental research of emotions in Spanish populations.  相似文献   
1000.
This study aims to analyze the psychometric properties of the Spanish version of the Scale of Perceived Social Support Specific to the Illness of Revenson et al. 1991. A sample of 202 patients with chronic conditions was used. After making several factor analysis of the scale on all four versions (partner, family, friends and doctors), it was found a structure formed by two factors involving positive social support and not functional or problematic social support. The results obtained with Cronbach's alpha show that all scales have acceptable and adequate internal consistency. In this sense, this scale may be appropriate to identify properly perceived social support for chronic patients on the four sources of support studied.  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