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   483篇
  免费   21篇
  2022年   3篇
  2021年   5篇
  2020年   7篇
  2019年   7篇
  2018年   8篇
  2017年   10篇
  2016年   22篇
  2015年   14篇
  2014年   14篇
  2013年   50篇
  2012年   25篇
  2011年   29篇
  2010年   12篇
  2009年   12篇
  2008年   18篇
  2007年   28篇
  2006年   22篇
  2005年   10篇
  2004年   15篇
  2003年   13篇
  2002年   16篇
  2001年   9篇
  2000年   4篇
  1999年   3篇
  1998年   4篇
  1997年   7篇
  1996年   5篇
  1995年   3篇
  1994年   5篇
  1993年   3篇
  1992年   9篇
  1991年   9篇
  1990年   5篇
  1989年   6篇
  1988年   5篇
  1985年   3篇
  1984年   4篇
  1983年   3篇
  1982年   3篇
  1981年   3篇
  1980年   3篇
  1978年   5篇
  1976年   4篇
  1974年   10篇
  1971年   3篇
  1969年   3篇
  1968年   6篇
  1957年   4篇
  1956年   5篇
  1955年   4篇
排序方式: 共有504条查询结果,搜索用时 15 毫秒
241.
242.
Decades of empirical work have confirmed that experiences with violence are associated with a variety of adverse behavioral and mental health as well as academic outcomes for children and adolescents. Yet this research largely has relied on indirect measures of exposure. In this study, we apply geospatial analysis to examine the relation between neighborhood violent crime (via police reports) and academic performance (via school-level standardized test proficiency rates). Findings suggest that greater numbers of crimes proximal to school buildings relate to lower levels of academic performance. These results persisted even when controlling economic disadvantage in the student body. Implications for research and policy are discussed.  相似文献   
243.
The current study examined patterns of coping strategies in a sample of 497 low-income urban African American adolescents (mean age = 12.61 years). Results of confirmatory factor analysis indicated that the 4-factor structure of the Children's Coping Strategies Checklist (T. S. Ayers, I. N. Sandler, S. G. West, & M. W. Roosa, 1996) was not replicated in the current sample. The final model was a 3-factor model that was invariant across gender. The Active Coping factor and Revised Avoidant Coping factor were highly correlated in the present sample. Results of cluster analyses identified 2 coping groups differing on the frequency of coping use and preferred coping methods. The 1st group was more likely to use avoidant coping and less likely to use social support-seeking coping than the 2nd group, which showed more consistent use across coping strategies. There were no significant differences in the association between stressors and symptoms across the 2 groups. The results highlight the importance of examining factor structures of coping measures with underrepresented groups.  相似文献   
244.
245.
Central nervous system (CNS) vasculitis is a rare entity, especially when it occurs in isolation; it is seen more commonly as part of a multisystem vasculitis. Common presenting symptoms include persistent headache, encephalopathy, and multifocal signs. We discuss the case of a 68-year-old female who presented twice in 1 month with confusion and choreaform movements. Extensive workup was negative for a connective tissue disease or other conditions in the differential, including neurosarcoidosis, Creutzfeldt-Jakob disease, and neurosyphilis. The only significant findings were elevated erythrocyte sedimentation rate, inflammatory signs in the CNS, and diffuse slowing of the electroencephalogram. A presumptive diagnosis of isolated angiitis of the central nervous system (IACNS) was made and the patient was successfully treated with steroids. She recovered fully with no residual symptoms. The diagnosis of IACNS is often difficult given there are no definitive laboratory investigations or pathognomonic presentation. However, a series of signs, symptoms, and laboratory findings have been proposed that are helpful in making the diagnosis. To our knowledge, IACNS presenting primarily with delirium has not been previously reported in the literature. The diagnosis of IACNS is purely speculative for this case, as the gold standard for diagnosis, a leptomeningeal cortical biopsy, was not performed.  相似文献   
246.
The primary purpose of this study was to examine the synchronous and temporal relations between engagement in activities and the two primary dimensions of affect—namely, positive and negative affect—using an intensive time-series design called concomitant time series analysis (CTSA). Twenty-four dementia caregivers completed 56 diary measures (4 times per day for 2 weeks) assessing their experience of positive and negative affect as well as engagement in a variety of activities. Total number of activities was significantly correlated with positive affect (r = .40), but not negative affect (r = -.12). Obtained pleasure from activities was significantly correlated with both positive (r = .42) and negative affect (r = - .17). These results may help further develop behavioral models of depression by suggesting that behavioral or self-reinforcing activities are associated primarily (or more saliently) with one's experience of positive affect. Future research examining the effect of behavioral interventions on both positive and negative affect is suggested, as is the examination of factors that may be more strongly associated with negative affect.  相似文献   
247.
Researchers have obtained conflicting results about the role of prosocial motivation in persistence, performance, and productivity. To resolve this discrepancy, I draw on self-determination theory, proposing that prosocial motivation is most likely to predict these outcomes when it is accompanied by intrinsic motivation. Two field studies support the hypothesis that intrinsic motivation moderates the association between prosocial motivation and persistence, performance, and productivity. In Study 1, intrinsic motivation strengthened the relationship between prosocial motivation and the overtime hour persistence of 58 firefighters. In Study 2, intrinsic motivation strengthened the relationship between prosocial motivation and the performance and productivity of 140 fundraising callers. Callers who reported high levels of both prosocial and intrinsic motivations raised more money 1 month later, and this moderated association was mediated by a larger number of calls made. I discuss implications for theory and research on work motivation.  相似文献   
248.
Long‐term neurocognitive and functional impairments following West Nile virus (WNV) disease are poorly understood. We assessed quality‐of‐life indices and neurocognitive performance in a cohort of 54 persons recovering from one of three WNV disease syndromes (fever [WNF], meningitis [WNM], or encephalitis [WNE]) approximately 1.5 years following acute illness. We compared findings between the three syndromic groups; the study cohort and a demographically similar group of 55 controls from a study of chronic fatigue syndrome (CFS); and the study cohort and a ‘normative’ control population based on cognitive test data. Persistent symptoms, diminished quality of life, and functional impairment were reported by 50% of WNF patients, and 75% each of WNM and WNE patients. Overall, objective neurocognitive performance did not differ significantly between the three syndromic groups, or between the study cohort and the CFS controls or the normative controls. In some neurocognitive subtests, the study cohort scored below the 15th percentile when compared with normative control data. Most persons who returned to independent living following hospitalization for WNV illness had persistent subjective complaints, but had normal cognitive function. However, a minority displayed subtle neurocognitive deficits more than 18 months following acute disease.  相似文献   
249.
At the same time many religious organizations are apparently becoming more internally secularized, other nonreligious organizations appear to be going through a countervailing process of "sacralization" (Demerath). This study explores this development through a case study of a state university hospital that attempted to created a more "holistic" corporate culture. Extending research on the declining scope of religious authority (Chaves) and professional systems (Abbott), this study suggests that secular settings may be fertile ground for craft versions of religious authority to develop. Implications of the latter during an age when authority structures and caring tasks in general are being downsized and devolved are discussed.  相似文献   
250.
The Infant Behavior Questionnaire Revised–Very Short Form (IBQ–R VSF; Putnam, Helbig, Gartstein, Rothbart, &; Leerkes, 2014 Putnam, S. P., Helbig, A. L., Gartstein, M. A., Rothbart, M. K., &; Leerkes, E. (2014). Development and assessment of short and very short forms of the Infant Behavior Questionnaire–Revised. Journal of Personality Assessment, 96, 445458. doi:10.1080/00223891.2013.841171[Taylor &; Francis Online], [Web of Science ®] [Google Scholar]) is a new publicly available measure of infant temperament measuring positive affectivity/surgency (PAS), negative emotionality (NEG), and orienting and regulatory capacity (ORC). Although the initial psychometric properties of the 3-factor model appear promising, it has not been administered to a large and diverse sample and its predictive validity has not been established. This study administered the IBQ–R VSF to a diverse sample of 5,639 mothers of infants aged between 23 and 52 weeks. Confirmatory factor analysis found that the 3-factor solution did not meet the requirement for satisfactory model fit. Exploratory factor analysis found that a 5-factor solution (PAS, NEG, Orienting Capacity, Affiliation/Regulation, and Fear) was statistically and conceptually the most parsimonious. All 5 temperament dimensions were found to relate to both mother- and partner-reported infant closeness, parenting confidence, and parenting satisfaction, and four of the dimensions (PAS, Orienting Capacity, NEG, and Fear) related to the infants' communication development. Some parental differences were also found. Together these findings suggest that the 5-factor IBQ–R VSF is a promising measure of infant temperament and is related to parenting perceptions and child language development.  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