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   339篇
  免费   3篇
  342篇
  2024年   4篇
  2023年   6篇
  2022年   3篇
  2021年   4篇
  2020年   11篇
  2019年   12篇
  2018年   11篇
  2017年   13篇
  2016年   18篇
  2015年   10篇
  2014年   13篇
  2013年   71篇
  2012年   24篇
  2011年   18篇
  2010年   13篇
  2009年   14篇
  2008年   15篇
  2007年   14篇
  2006年   9篇
  2005年   6篇
  2004年   8篇
  2003年   10篇
  2002年   8篇
  2001年   4篇
  2000年   2篇
  1997年   1篇
  1995年   3篇
  1994年   1篇
  1990年   1篇
  1989年   2篇
  1986年   1篇
  1981年   1篇
  1979年   1篇
  1978年   1篇
  1975年   2篇
  1971年   3篇
  1970年   1篇
  1968年   1篇
  1967年   1篇
  1955年   1篇
排序方式: 共有342条查询结果,搜索用时 15 毫秒
111.
  总被引:3,自引:0,他引:3  
Sixty insomniacs, aged 60 years or over, fulfilling the DSM-IV criteria for primary insomnia, completed a set of questionnaires measuring psychological distress. These included the Sleep Impairment Index (SIM), the Symptom Check List 90-Revised (SCL-90-R), the Penn State Worry Questionnaire (PSWQ), the Toronto Alexithymia Scale-20 (TAS-20) and the Elders Life Stress Inventory (ELSI). The insomniacs were compared on these measures with two contrast groups, one of elderly good sleepers and one an elderly community sample. As norms were developed for the SCL-90-R and PSWQ, insomniacs were also contrasted with the norm groups on these measures. In general, the results indicated a higher level of psychological distress among insomniacs than among the good sleepers, while there were negligible differences between insomniacs and the community sample on most measures. Overall, elderly insomniacs scored higher on measures of worry compared with the other groups, followed by measures of somatization, obsessive-compulsion and depression. It is concluded that excessive worrying was the most characteristic feature of elderly insomniacs.  相似文献   
112.
    
We sought to replicate and extend Carroll and Hesse's (1987) study of the acquisition of tacts by including participants with and without developmental disabilities. As in Carroll and Hesse, the present results showed that mand-tact training, rather than tact-only training, led to more rapid acquisition of tacts. Tacting on follow-up tests did not differ. In addition, our results show that mand-tact training established both verbal operants involved about as rapidly as tact-only training established only one verbal operant. DESCRIPTORS: verbal behavior, tact acquisition, mand-tact training, tact-only training, follow-up  相似文献   
113.
    
Abstract

Invariance of surveys across different groups means that the respondents interpret the items in the same way, as reflected in similar factor loadings, for example. Invariance can be assessed using various statistical procedures, such as Multi-Group Confirmatory Factor Analysis. However, these analyses require access to raw data. Here, we introduce a meta-analytic method that requires only the factor correlation matrices of samples as input. It compares the structures of intercorrelations of factors by correlating these values across two samples, yielding a value of overall similarity for how the factors intercorrelate in different samples. This method was tested in three different ways. We conclude that the method yields useful results and can assess invariance when raw data are not available.  相似文献   
114.
This is an autoethnographic study that inquiries into my own journey as an aspiring educational researcher throughout the second course of my Master’s Program at the University of Gothenburg in Sweden. My experiences take place in the context of a group of real educational researchers and their on-going research project at the faculty of education called ‘Beyond Plant Blindness: Seeing the importance of plants for a sustainable world’ (BPB). All of the experiences included in this study are expressed in the form of chronologically ordered narrative vignettes. In order to bring theoretical meaning to these experiences, the vignettes were critically reflected upon and interpreted through the concept Communities of Practice (CoP), which is central to situated learning theory. Through this conceptual lens, my experiences revealed that an aspiring educational researcher may feel emotional and intellectual growth as a newcomer who is granted legitimate peripheral participation in the ‘real’ researcher CoP. Consequently, this study sheds light on ways that real researchers may play a part in shaping the identities of aspiring educational researchers through learning experiences. However, more generally, this study may facilitate fresh conversations about the complexities of learning, identity, and inclusion in the field of educational research.  相似文献   
115.
    
The Rey–Osterrieth Complex Figure Test (RCFT) is one of the most commonly used neuropsychological tests in Sweden and Norway. However, no publications provide normative data for this population. The objective of this study was to present demographically adjusted norms for a Swedish and Norwegian population and to evaluate these in an independent comparison group.  相似文献   
116.
117.
Journal of Child and Family Studies - To optimize cognitive behavioral therapy (CBT) outcomes for anxiety disorders in youth, more knowledge is needed about how specific CBT components work....  相似文献   
118.
Abstract

The aim of the study was to investigate the prevalence of bullying and harassment at work, to identify risk groups and risk organizations, and to investigate who the victims report to be their tormentors. Bullying and harassment are defined as situations where a worker or a supervisor is systematically mistreated and victimized by fellow workers or supervisors through repeated negative acts. However, to be a victim of such bullying one must also feel inferiority in defending oneself in the actual situation. Data from 14 different Norwegian surveys (N = 7986) are presented, encompassing a broad array of organizations and professions. The results show that bullying and harassment at work are widespread problems in Norwegian working life. As many as 8.6% of the respondents had been bullied at work during the previous six months. Organizations with many employees, male-dominated organizations, and industrial organizations had the highest prevalence of victimization. Older workers had a higher risk of victimization than younger workers. Even if men and women do not differ in prevalence of bullying, significantly more men were reported as bullies. Victims reported superiors as bullies as often as they reported colleagues as their tormentor(s).  相似文献   
119.
In birds, the colour, maculation, shape, and size of their eggs play critical roles in discrimination of foreign eggs in the clutch. So far, however, no study has examined the role of egg arrangement within a clutch on host rejection responses. We predicted that individual females which maintain consistent egg arrangements within their clutch would be better able to detect and reject foreign eggs than females without a consistent egg arrangement (i.e. whose eggs change positions more often across incubation). We tested this “egg arrangement hypothesis” in blackbirds (Turdus merula) and song thrush (T. philomelos). Both species are suitable candidates for research on egg rejection, because they show high inter-individual variation and individual repeatability in egg rejection responses. As predicted, using our custom-defined metrics of egg arrangement, rejecter females’ clutches showed significantly more consistent patterns in egg arrangement than acceptor females’ clutches. Only parameters related to blunt pole showed consistent differences between rejecters and acceptors. This finding makes biological sense because it is already known that song thrush use blunt pole cues to reject foreign eggs. We propose that a disturbance of the original egg arrangement pattern by the laying parasite may alert host females that maintain a consistent egg arrangement to the risk of having been parasitized. Once alerted, these hosts may shift their discrimination thresholds to be more restrictive so as to reject a foreign egg with higher probability. Future studies will benefit from experimentally testing whether these two and other parasitized rejecter host species may rely on the use of consistent egg arrangements as a component of their anti-parasitic defence mechanisms.  相似文献   
120.
Schizophrenia is characterized by cognitive impairment, especially in relation to executive functions. Brain structural abnormalities are also often seen in schizophrenia although little is known of the relationship between cognitive impairment and structural brain changes. Our aim was therefore to investigate this relationship further using MRI and a dichotic listening (DL) task with simple speech sounds and with instructions to focus attention and report only from the left or right ear stimulus. When instructed to focus attention on the left ear syllable a cognitive conflict is induced requiring the allocation of executive resources to be resolved. Grey matter (GM) volume was measured with MRI from four volumes of interests (VOIs), left and right frontal and temporal cortex, respectively, and correlated with DL performance. The results showed significant differences between the groups in their ability to focus attention on and report the left ear stimulus, which was accompanied by reduced GM volume in the left frontal and right temporal lobe VOIs. There was also a significant positive correlation between left frontal GM volume and performance on the DL task, for the groups combined. The results did not support a conclusion that an impairment in cognitive function in schizophrenia was driven by an corresponding impairment in brain structure, since there were no significant correlations when the groups were analyzed separately. It is however concluded that patients with schizophrenia are impaired in executive functions and that they also show reduced GM volumes in left frontal and right temporal lobe areas, compared to healthy controls.  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