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   4101篇
  免费   260篇
  国内免费   4篇
  2023年   42篇
  2022年   56篇
  2021年   70篇
  2020年   113篇
  2019年   119篇
  2018年   217篇
  2017年   206篇
  2016年   193篇
  2015年   131篇
  2014年   121篇
  2013年   556篇
  2012年   226篇
  2011年   206篇
  2010年   171篇
  2009年   138篇
  2008年   218篇
  2007年   193篇
  2006年   158篇
  2005年   121篇
  2004年   114篇
  2003年   125篇
  2002年   111篇
  2001年   78篇
  2000年   65篇
  1999年   59篇
  1998年   39篇
  1997年   37篇
  1996年   32篇
  1995年   19篇
  1994年   23篇
  1993年   17篇
  1992年   22篇
  1991年   17篇
  1990年   15篇
  1989年   16篇
  1988年   15篇
  1987年   16篇
  1985年   20篇
  1984年   14篇
  1982年   18篇
  1981年   17篇
  1980年   12篇
  1978年   11篇
  1976年   12篇
  1975年   15篇
  1974年   11篇
  1973年   13篇
  1971年   11篇
  1970年   10篇
  1967年   10篇
排序方式: 共有4365条查询结果,搜索用时 31 毫秒
81.
Basic research on avoidance by Murray Sidman laid the foundation for advances in the classification, conceptualization and treatment of avoidance in psychological disorders. Contemporary avoidance research is explicitly translational and increasingly focused on how competing appetitive and aversive contingencies influence avoidance. In this laboratory investigation, we examined the effects of escalating social-evaluative threat and threat of social aggression on avoidance of social interactions. During social-defeat learning, 38 adults learned to associate 9 virtual peers with an increasing probability of receiving negative evaluations. Additionally, 1 virtual peer was associated with positive evaluations. Next, in an approach–avoidance task with social-evaluative threat, 1 peer associated with negative evaluations was presented alongside the peer associated with positive evaluations. Approaching peers produced a positive or a probabilistic negative evaluation, while avoiding peers prevented a negative evaluation (and forfeited a positive evaluation). In an approach–avoidance task with social aggression, virtual peers gave and took money away from participants. Escalating social-evaluative threat and aggression increased avoidance, ratings of feeling threatened and threat expectancy and decreased ratings of peer favorableness. These findings underscore the potential of coupling social defeat and approach–avoidance paradigms for translational research on the neurobehavioral mechanisms of social approach–avoidance decision-making and anxiety.  相似文献   
82.
The Journal of Value Inquiry -  相似文献   
83.
Research on Child and Adolescent Psychopathology - The purpose of this study was to understand the trajectories of nonsuicidal self-injury (NSSI) and suicide plans (SP) in the 90 days...  相似文献   
84.
Current Psychology - Based on Farber’s burnout proposal, the first aim of this study was to examine the psychometric properties of the short version of the Burnout Clinical Subtype...  相似文献   
85.
Current Psychology - The current study aimed to explore the validity of a single, self-report measure for bladder and bowel anxieties (Bladder and Bowel Anxiety Grouping Item; BABAGI), using two...  相似文献   
86.
Current Psychology - Research has questioned whether it is feasible to assess psychosocial variables through web-based recruitment methods. Previous literature on IBD focused exclusively on testing...  相似文献   
87.
Theoretical Medicine and Bioethics -  相似文献   
88.

This study aimed to examine the role of positive relationships and academic achievement in predicting student well-being, i.e. subjective happiness. This study employed a longitudinal design with two waves of data collection on a sample of 786 primary school students in Hong Kong. Students completed questionnaires on parent-child relationship, teacher-student relationship, peer relationship, academic achievement, and happiness at the beginning and end of the school year. Path analysis was used for data analysis. The results indicated that Time 1 parent-child relationship and peer relationship were associated with Time 2 academic achievement, after controlling for Time 1 academic achievement. However, only Time 1 parent-child relationship was predictive of Time 2 happiness. Time 2 academic achievement was a mediator between Time 1 parent-child relationship and peer relationship and Time 2 happiness. Furthermore, girls reported higher levels of academic achievement when they perceived better peer relationship than did boys, and girls were happier when they had higher levels of academic achievement than were boys. The results suggested the need to put in place strategies to enhance parent-child relationship, peer relationship, and a harmonious classroom.

  相似文献   
89.
90.
There is a frequent need to measure the degree of agreement among R observers who independently classify n subjects within K nominal or ordinal categories. The most popular methods are usually kappa-type measurements. When = 2, Cohen's kappa coefficient (weighted or not) is well known. When defined in the ordinal case while assuming quadratic weights, Cohen's kappa has the advantage of coinciding with the intraclass and concordance correlation coefficients. When > 2, there are more discrepancies because the definition of the kappa coefficient depends on how the phrase ‘an agreement has occurred’ is interpreted. In this paper, Hubert's interpretation, that ‘an agreement occurs if and only if all raters agree on the categorization of an object’, is used, which leads to Hubert's (nominal) and Schuster and Smith's (ordinal) kappa coefficients. Formulae for the large-sample variances for the estimators of all these coefficients are given, allowing the latter to illustrate the different ways of carrying out inference and, with the use of simulation, to select the optimal procedure. In addition, it is shown that Schuster and Smith's kappa coefficient coincides with the intraclass and concordance correlation coefficients if the first coefficient is also defined assuming quadratic weights.  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