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   4196篇
  免费   71篇
  国内免费   2篇
  4269篇
  2024年   22篇
  2023年   52篇
  2022年   39篇
  2021年   53篇
  2020年   107篇
  2019年   113篇
  2018年   134篇
  2017年   149篇
  2016年   159篇
  2015年   84篇
  2014年   114篇
  2013年   452篇
  2012年   187篇
  2011年   220篇
  2010年   147篇
  2009年   131篇
  2008年   173篇
  2007年   189篇
  2006年   154篇
  2005年   147篇
  2004年   137篇
  2003年   117篇
  2002年   136篇
  2001年   78篇
  2000年   50篇
  1999年   51篇
  1998年   48篇
  1997年   40篇
  1996年   31篇
  1995年   43篇
  1994年   50篇
  1993年   37篇
  1992年   48篇
  1991年   36篇
  1990年   31篇
  1989年   29篇
  1988年   39篇
  1987年   24篇
  1986年   32篇
  1985年   40篇
  1984年   32篇
  1983年   30篇
  1982年   25篇
  1981年   25篇
  1980年   21篇
  1979年   24篇
  1978年   34篇
  1977年   21篇
  1974年   19篇
  1973年   16篇
排序方式: 共有4269条查询结果,搜索用时 0 毫秒
921.
922.
    
People sometimes seek to convey discrepant impressions of themselves to different audiences simultaneously. Research suggests people are generally successful in this “multiple audience problem.” Adding to previous research, the current research sought to examine factors that may limit this success by measuring social anxiety and placing participants into situations requiring them to either establish or preserve multiple impressions simultaneously. In general, participants were more successful when preserving previously conveyed impressions than when establishing impressions for the first time. In contrast, social anxiety did not affect multiple audience success. In all, this research offers valuable insight into potential challenges that people face in many social situations.  相似文献   
923.
    
Research has suggested that prenatal depression may be associated with disrupted maternal responses to infant stimuli, with depressed pregnant women not showing the bias toward distressed infants as that observed in nondepressed pregnant women. The current study examined the effects of depression on self‐ reported responses to infant stimuli, in early pregnancy. Women with clinical depression (n = 38), and nondepressed women (n = 67) were recruited from a wider cognitive behavioral therapy trial. They completed Maternal Response Scales in which they were presented with images of distressed, neutral, and happy infant faces, with no time limit. The women rated their responses to these images along three dimensions—wanting to comfort, wanting to turn away, and feelings of anxiety—using Likert scales via a computerized task. There was evidence that women with depression in pregnancy showed different responses than did women without depression. Women with depression were substantially more likely to be in the highest quartile for ratings of wanting to turn away, odds (OR) ratio = 4.15, 95% confidence intervals (CIs) = 1.63–10.5, p = .003, and also were substantially less likely to be in the highest quartile for wanting to comfort a distressed infant face, OR = 0.22, 95% CIs = 0.09–0.54, p < .001. Findings are consistent with there being both a heightened avoidant and a reduced comforting response toward distressed infants in depressed pregnant women, providing some support that depression disrupts maternal preparations at a conscious level.  相似文献   
924.
    
The American Psychiatric Association, (“APA”), with more than 36,000 members at present, is the Nation's leading organization of physicians who specialize in psychiatry. APA provides for education and advocacy and develops policy through Position Statements. It promotes enhanced knowledge of particular topics relevant to psychiatric practice and patient care through Resource Documents. Since 1993, the APA has developed various positions and resource materials related to firearms and mental illness, incorporating evolving themes as new issues emerge. This paper reflects the APA's 2014 Resource Document on “Access to Firearms by People with Mental Disorders.” This article is derived from work done on behalf of American Psychiatric Association and remains the property of APA. It has been altered only in response to the requirements of peer review. Copyright © 2015 American Psychiatric Association. Published with permission (original adopted by the American Psychiatric Association 2014).  相似文献   
925.
926.
    
Developmental dyscalculia (DD) is marked by specific deficits in processing numerical and mathematical information despite normal intelligence (IQ) and reading ability. We examined how brain circuits used by young children with DD to solve simple addition and subtraction problems differ from those used by typically developing (TD) children who were matched on age, IQ, reading ability, and working memory. Children with DD were slower and less accurate during problem solving than TD children, and were especially impaired on their ability to solve subtraction problems. Children with DD showed significantly greater activity in multiple parietal, occipito‐temporal and prefrontal cortex regions while solving addition and subtraction problems. Despite poorer performance during subtraction, children with DD showed greater activity in multiple intra‐parietal sulcus (IPS) and superior parietal lobule subdivisions in the dorsal posterior parietal cortex as well as fusiform gyrus in the ventral occipito‐temporal cortex. Critically, effective connectivity analyses revealed hyper‐connectivity, rather than reduced connectivity, between the IPS and multiple brain systems including the lateral fronto‐parietal and default mode networks in children with DD during both addition and subtraction. These findings suggest the IPS and its functional circuits are a major locus of dysfunction during both addition and subtraction problem solving in DD, and that inappropriate task modulation and hyper‐connectivity, rather than under‐engagement and under‐connectivity, are the neural mechanisms underlying problem solving difficulties in children with DD. We discuss our findings in the broader context of multiple levels of analysis and performance issues inherent in neuroimaging studies of typical and atypical development.  相似文献   
927.
    
Based on the work of Van Dyne, Ang, and Botero (2003 Van Dyne, L., Ang, S. and Botero, I. C. 2003. Conceptualizing employee silence and employee voice as multidimensional constructs. Journal of Management Studies, 40: 13591392. [Crossref], [Web of Science ®] [Google Scholar]), the concept of voice, generally defined as speaking up, was expanded to include three types of voice behaviors: prosocial, acquiescent, and defensive. Prosocial voice is a fundamentally positive form of voice, whereas acquiescent and defensive voice behaviors reflect more negative forms of voice. We examined individual-level personality traits of Agreeableness and Extraversion and group-level participative climate as predictors of supervisor ratings of each voice behavior. Testing these ideas with a multilevel design in a sample of Chinese workers and their managers, results demonstrated support for links of Agreeableness, Extraversion, and participative climate with supervisor ratings of voice behaviors. Further, group-level participative climate moderated relationships between individual-level Agreeableness and voice behaviors.  相似文献   
928.
929.
    
Suicide attempts constitute a serious clinical problem. People who have attempted suicide are at an elevated risk for additional suicide attempts, but there is limited evidence regarding the predictors of suicidality of suicide attempters following case management services. In the present study the indicators of suicidality after case management were examined. A total of 1,056 subjects who had recently attempted suicide were recruited from January 1, 2011, to June 30, 2011. The suicide prevention center of Kaohsiung City in Taiwan provided case management services and followed up on suicide attempt cases for 6 months. The salient factors for repeat suicide attempts were estimated using a logistic regression analysis. The results showed that multiple factors, including a “willingness to receive mental health services during a crisis,” “social support,” “a history of mental disorders,” and “a history of suicide,” could predict repeat suicide attempts with hazard ratios (0.58, 0.54, 3.84, 1.51) and 95% confidence interval (0.39–0.86, 0.36–0.83, 2.41–6.10, 1.03–2.21). The four factors mentioned above were the most accurate predictors of subsequent suicidality when case management services were utilized after 6 months of follow‐up. The findings of our study could help clarify future strategies for suicide prevention.  相似文献   
930.
    
This study investigated the relationship between psychological resilience and its relevant variables by using a meta‐analytic method. The results indicated that the largest effect on resilience was found to stem from the protective factors, a medium effect from risk factors, and the smallest effect from demographic factors.  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