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   3487篇
  免费   1413篇
  2023年   4篇
  2022年   3篇
  2021年   78篇
  2020年   87篇
  2019年   382篇
  2018年   274篇
  2017年   387篇
  2016年   376篇
  2015年   338篇
  2014年   307篇
  2013年   528篇
  2012年   280篇
  2011年   197篇
  2010年   248篇
  2009年   217篇
  2008年   185篇
  2007年   111篇
  2006年   106篇
  2005年   120篇
  2004年   89篇
  2003年   103篇
  2002年   107篇
  2001年   87篇
  2000年   69篇
  1999年   39篇
  1998年   9篇
  1997年   10篇
  1996年   5篇
  1995年   7篇
  1994年   5篇
  1993年   5篇
  1992年   13篇
  1991年   10篇
  1990年   12篇
  1989年   6篇
  1988年   6篇
  1987年   3篇
  1986年   5篇
  1985年   7篇
  1980年   4篇
  1978年   3篇
  1974年   3篇
  1973年   3篇
  1969年   4篇
  1968年   6篇
  1956年   2篇
  1953年   4篇
  1952年   3篇
  1951年   5篇
  1950年   6篇
排序方式: 共有4900条查询结果,搜索用时 15 毫秒
61.
May DC  Vartanian LR  Virgo K 《Adolescence》2002,37(146):267-287
This paper examines the effect of parental attachment and supervision on fear of crime among adolescent males. Earlier work has suggested that feelings of powerlessness and association with deviant peers have a significant impact on adolescent fear of crime. As the nature of the parent-adolescent relationship is also a key predictor of adolescent self-concept and quality of peer relationships, we felt that parental attachment and supervision should also impact fear of crime. Using self-report surveys from 318 incarcerated adolescent males, we examine the effect of parental attachment and supervision, along with other demographic and contextual variables, on fear of criminal victimization, perceived safety, and perceptions of risk. The results indicate that those boys who are most attached to their parents are less fearful of criminal victimization and feel safer in their environment than do their counterparts with weaker parental attachments. Additionally, those boys whose parents supervise them closely are more fearful of criminal victimization, but have lower levels of perceived risk of victimization. Implications and ramifications for social policies and future research are also discussed.  相似文献   
62.
Path integration while ignoring irrelevant movement   总被引:5,自引:0,他引:5  
Participants attempted to return to the origin of travel after following an outbound path by locomotion on foot (Experiments 1-3) or in a virtual visual environment (Experiment 4). Critical conditions interrupted the outbound path with verbal distraction or irrelevant, to-be-ignored movements. Irrelevant movement, real or virtual, had greater effects than verbal or cognitive distraction, indicating inability to ignore displacement during path integration. Effects of the irrelevant movement's direction (backward vs. rightward) and location (1st vs. 2nd leg of path) indicated that participants encoded a configural representation of the pathway and then cognitively compensated for the movement, producing errors directly related to the demands of compensation. An encoding-error model fit to the data indicated that backward movement produced downward rescaling, whereas movement that led to implied rotation (rightward on 2nd leg) produced distortions of shape and scale.  相似文献   
63.
The article investigates the relationships between platelet monoamine oxidase-B (MAO-B) activity, personality, and psychopathology (Diagnostic and Statistical Manual of Mental Disorders [4th ed.; American Psychiatric Association, 1994] diagnoses. These relationships were assessed in 178 incarcerated male juvenile delinquents. Even after controlling for smoking, the authors found that both Internalizing and Externalizing Psychopathology were negatively related to MAO-B activity. In the final reduced model, novelty seeking fully mediated the relationships between MAO-B and Externalizing Psychopathology but not between MAO-B and Internalizing Psychopathology. It was hypothesized that low platelet MAO-B activity does not directly predispose individuals to psychopathology but is related to specific personality traits, which in turn represent a vulnerability factor for psychopathology. Future studies should help clarify the nature of the relationships between personality, biological markers, and psychopathology.  相似文献   
64.
65.
66.
Witte‐Townsend and DiGiulio explore some of the dimensions of knowing that children, teachers and parents may engage together during story‐time. They reflect on some of their own long‐term relationships with children and children's books, especially Phoebe Gilman's Gilman P 1992 Something from nothing (New York, NY, Scholastic Inc)  [Google Scholar] Something from nothing (published in 1992) and Simms Taback's Taback S 1999 Joseph had a little overcoat (New York, NY, Viking‐Penguin)  [Google Scholar] Joseph had a little overcoat, published in 1999. The authors probe issues such as why children ask to hear a favourite story over and over and why they suddenly abandon all interest and move on to a new book. They explore the meaning of the silences that sometimes arise during story‐time, pooling around the young listeners as the last words of the book are read. Witte‐Townsend and DiGiulio remind us of the value of literature in the lives of children and they affirm that the reading and re‐reading of favourite stories enables the understanding of complex human issues and contributes significantly to social, emotional and spiritual growth.  相似文献   
67.
68.
The ability of scores on the Early Prevention of School Failure battery to predict Stanford Achievement Test scores was examined. Participants included 280 first-grade students who were administered the battery at the beginning of kindergarten and the Stanford Achievement Test at the end of first grade. Principal factor analysis based on the oblique rotation exhibited simple structure between scores on the Peabody Picture Vocabulary Test-Revised, the Preschool Language Scale, and the Stanford Achievement Test (verbal or language factor), with the Draw-A-Man test and the Developmental Test of Visual-Motor Integration-Revised loading on a separate factor (motor factor). Results suggest that language-based skills were highly associated with later academic performance in school-aged children.  相似文献   
69.
Participants were asked to generate a single sequence of numbers in between two bounds. By varying the requested sequence length and way in which the question is posed, this paradigm enables assessment of the contributions to central executive functioning of schema, focus of attention, and load. With sequences of three or four numbers, a quarter of the sample failed fully to comply with the instructions. They generated an incorrect number of numbers or went outside the specified bounds. With sequences of six numbers, more than half of the sample infringed one or more of the constraints. Participants consistently generated sequences with particular generic properties. The overall frequency and patterns of infringements suggest that a substantial proportion of participants focused their conceptual attention on sequence content and often neglected the problem of how thelength and boundary constraints were going to be evaluated either before or during response delivery.  相似文献   
70.
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