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   1025篇
  免费   53篇
  2020年   14篇
  2019年   16篇
  2018年   22篇
  2017年   22篇
  2016年   31篇
  2015年   28篇
  2014年   39篇
  2013年   116篇
  2012年   35篇
  2011年   35篇
  2010年   28篇
  2009年   27篇
  2008年   30篇
  2007年   28篇
  2006年   21篇
  2005年   26篇
  2004年   37篇
  2003年   34篇
  2002年   29篇
  2001年   33篇
  2000年   19篇
  1999年   19篇
  1998年   16篇
  1997年   19篇
  1995年   11篇
  1994年   12篇
  1993年   18篇
  1992年   16篇
  1991年   11篇
  1990年   16篇
  1989年   10篇
  1988年   10篇
  1987年   19篇
  1986年   11篇
  1985年   16篇
  1984年   15篇
  1982年   14篇
  1981年   11篇
  1980年   11篇
  1979年   17篇
  1978年   8篇
  1977年   9篇
  1976年   7篇
  1975年   8篇
  1974年   11篇
  1973年   7篇
  1972年   7篇
  1970年   12篇
  1968年   9篇
  1966年   9篇
排序方式: 共有1078条查询结果,搜索用时 15 毫秒
91.
We report a range of lateralized coping strategies adopted by large social groups of cattle in response to mild challenges posed by humans of varying degrees of familiarity. At either 14 or 18 pens at a commercial feedlot, with 90 to 200 cattle in each, we conducted a series of video recorded ‘pressure tests’. ‘Frontal’ pressure tests involved walking from a position perpendicular to the concrete feed bunk of a given pen, towards the geometric centre of the line of feeding cattle. ‘Bunk-side’ pressure tests involved experimenters walking closely past a pen of feeding cattle in one direction, before returning in the opposite direction shortly afterwards. Experimenters wore white dust masks to alter their facial features in the bunk-side pressure tests. In both frontal and bunk-side pressure tests, distance from the experimenter influenced cattle’s choice of binocular viewing, cessation of feeding, standing or stepping backwards to monitor the approach and leaving the feed bunk. The frequency of these coping strategies differed in a lateralized manner. The cattle were more likely to accept the close positioning of a generally familiar, unmasked human on their left, which is traditionally referred to as the “near” side. By contrast, when responding to the approach of an unfamiliar, masked human, cattle conformed to the general vertebrate model and were more likely to remove themselves from the potential threat viewed within the left and not right visual field. We argue that the traditional terms for livestock sidedness as “near” (left) and “off” (right) sides demonstrate a knowledge of behavioural lateralization in domestic livestock that has existed for over 300 years of stock handling.  相似文献   
92.
93.
In response to the need for a more diverse workforce, our medical school developed new policies and procedures that focus on the recruitment and selection of diverse students with a specific focus on those considered underrepresented in medicine. To understand what these students bring to the practice of medicine, researchers investigated their perception of their cultural assets and how they plan to use these assets as physicians. A cross-section of 23 ethnically, culturally, and geographically diverse medical students were interviewed and data were analyzed through phenomenographical methods. The results indicate that students view themselves as having multiple assets that could be of significant value in their future practice of medicine, including: a) an interest in science and access to family members in medicine, b) personal and familial struggles with health, c) self and family as immigrants, and d) strong family and community orientations. Students perceived these as cultural assets because they could directly identify where these assets could be valuable in medicine but questioned how to maintain them throughout medical school. Now that our institution has identified these assets, next steps include administrators' investigation of ways to leverage them through curricular and educational programs.  相似文献   
94.
A positive interracial interaction can create a foundation for friendships, improved intergroup attitudes and reduced prejudice. Recent research has demonstrated that what people talk about in important. Here, two studies expand the interaction content model of interracial interactions to reveal that Black and White Americans perceive interaction content in similar and different ways. As expected, Black and White participants evaluated conversation topics along the same three dimensions, but differed in their perceptions of specific conversation topics. These convergences and differences emerged for pre‐generated (Study 1) and self‐generated (Study 2) topics. Factor analyses revealed that conversation attributes similarly distilled to the predicted underlying content dimensions of intimacy, valence, and controversy for Black and White Americans. However, Black individuals found interaction content, in general, to be more controversial, race‐related, enjoyable, and predictable than White individuals. Although both groups found race‐related content more controversial, Black individuals were less bothered by discussing race and found race‐related topics to be more predictable and enjoyable to discuss. These findings supported the interaction content model which may provide a framework for future research on interracial interactions. We conclude with the importance of considering differences in perceptions of interaction content, as well as suggestions for how intergroup interaction research could benefit from systematically incorporating such content.  相似文献   
95.
In practice, a single test is used to quantify an individual's proprioception. Previous studies have not found a correlation between joint position sense (JPS) and force sense (FS), which are submodalities of proprioception. The purpose of the present study is to determine if root mean square (RMS) error in JPS and FS are related at the shoulder, controlling for external load and elevation angle. Active shoulder angle and force reproduction protocols were performed. No correlation was found between JPS and FS (r = –.019, p = .941) nor were any individual angle and load combinations significant. The main effect for angle in JPS was significant (p < .001). Follow-up contrast demonstrated a significant (p < .001) decrease in RMS error with increased elevation. A significant load by angle interaction was found for FS (p = .014). Follow-up simple effects tests by angle demonstrated RMS error decreased with load at 50° and 70° but not at 90°. By load, RMS error only decreased for 120% between 50° and 90°. JPS and FS demonstrate different behavior with load and angle. This differing behavior is more likely responsible for the lack of correlation than angle and load differences in JPS and FS protocols.  相似文献   
96.
This study attempted to determine the effects of family and social support on the self‐esteem, self‐efficacy, and job search self‐efficacy of the unemployed. A total of 117 surveys were collected in Nevada, Idaho, and Oregon measuring self‐esteem, general self‐efficacy, and job search self‐efficacy and social support. Pearson correlation coefficients demonstrated moderately strong positive relationships between social support and self‐esteem, general self‐efficacy, and job search self‐efficacy. Social and family support had a stronger influence on the self‐perceptions of men than women.  相似文献   
97.
It is unclear what factor structure best represents the Positive and Negative Affect Schedule (PANAS) from childhood to adulthood. The PANAS structure was examined in a sample of 555 children (M age = 11.66, SD = 1.24), 608 adolescents (M age = 15.45, SD = 1.09), and 553 young adults (M age = 18.75, SD = 1.00). A partially invariant model consisting of Positive Affect, Fear, and Distress factors best represented the PANAS across all age groups, indicating that the underlying constructs are the same across age but that the factors become increasingly interrelated with increasing age.  相似文献   
98.
99.
Reality television programs that explore purportedly paranormal phenomena with pseudoscientific research approaches have emerged in popular culture. These shows commonly feature electronic voice phenomena (EVP), whereby recording devices capture audio signals that are interpreted as paranormal messages. We compared perceptions for voices in EVP with actual speech, acoustic noise, and degraded speech. Some participants were told that the experiment was about speech intelligibility, whereas others were told that the experiment was about paranormal EVP. The paranormal prime increased the proportion of trials for which participants perceived voices in both EVP stimuli and degraded speech. When a voice was detected, low agreement was found regarding the content of EVP messages. In both priming conditions, participants reported general skepticism in the paranormal. Results are discussed in the context of theoretical perspectives on paranormal events, trait‐versus‐state accounts of paranormal beliefs, and pseudoscientific approaches to research. Copyright © 2014 John Wiley & Sons, Ltd.  相似文献   
100.
The Girls' Circle is a support group for adolescent girls developed by Beth Hossfeld and Giovanna Taormina as a unique program that addresses the needs of girls by focusing on increasing connections, building empathic skills, and developing resiliency. The present study evaluates the effectiveness of the Girls' Circle intervention on improving social support, body image, locus of control, self-efficacy, and self-esteem. Sixty-three girls from 9 support groups (comprising 5 to 15 girls each) across the United States completed the Multidimensional Scale of Perceived Social Support, the Body Parts Satisfaction Scale, the Nowicki-Strickland Personal Reaction Survey, Schwarzer's General Self-Efficacy Scale, and the Rosenberg Self-Esteem scale both before and after the 10-week Girls' Circle program. Results revealed a significant increase in social support, body image, and self-efficacy after completion of the program.  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