全文获取类型
收费全文 | 725篇 |
免费 | 33篇 |
专业分类
758篇 |
出版年
2024年 | 3篇 |
2023年 | 6篇 |
2022年 | 8篇 |
2021年 | 9篇 |
2020年 | 17篇 |
2019年 | 24篇 |
2018年 | 29篇 |
2017年 | 25篇 |
2016年 | 24篇 |
2015年 | 21篇 |
2014年 | 32篇 |
2013年 | 90篇 |
2012年 | 43篇 |
2011年 | 44篇 |
2010年 | 30篇 |
2009年 | 28篇 |
2008年 | 41篇 |
2007年 | 31篇 |
2006年 | 21篇 |
2005年 | 20篇 |
2004年 | 24篇 |
2003年 | 25篇 |
2002年 | 16篇 |
2001年 | 19篇 |
2000年 | 15篇 |
1999年 | 11篇 |
1998年 | 2篇 |
1997年 | 2篇 |
1996年 | 4篇 |
1995年 | 5篇 |
1993年 | 3篇 |
1992年 | 10篇 |
1991年 | 3篇 |
1990年 | 8篇 |
1989年 | 11篇 |
1988年 | 12篇 |
1987年 | 5篇 |
1986年 | 4篇 |
1985年 | 4篇 |
1984年 | 2篇 |
1983年 | 6篇 |
1982年 | 3篇 |
1981年 | 4篇 |
1979年 | 2篇 |
1969年 | 1篇 |
1968年 | 1篇 |
1963年 | 1篇 |
1949年 | 1篇 |
1948年 | 1篇 |
1937年 | 1篇 |
排序方式: 共有758条查询结果,搜索用时 15 毫秒
81.
The aim of this study is to determine the attitudes and behaviors of religious scholars regarding organ donation and transplantation. In this study, 540 officials working in the Department of Religious Affairs in Kayseri, Turkey, were included. Overall, 86.6% response rate (n = 468) was achieved. Although a majority of the officials of religion in this study stated that they believed in the importance of organ donation (90.8%), the rate of considering donation (57.9%) and the donation rate (1.1%) were found to be substantially low. There is a difference between the employment status and willingness to donate organs. The rate of willingness to donate was significantly high in men than women. And also was high in imams and preachers. Regarding the sources of information, the majority of the respondents (70.0%) cited mass media. Overall, 15.3% cited school education and 42.0% religious publications. The most common question (83.1%) that was asked was “whether or not organ donation was suitable for Muslim religious”. Our study revealed that although the research groups have positive ideas about organ donation and transplantation, their role was low in informing and motivating people about organ donation and transplantation. 相似文献
82.
Erla Svansdottir Krista C. van den Broek Hrobjartur D. Karlsson Daniel T. Olason Hordur Thorgilsson Johan Denollet 《Personality and individual differences》2013
The distressed (Type D) personality (the combination of negative affectivity and social inhibition traits) has been associated with adverse health outcomes. This study investigated the validity of the Type D construct against the Five-Factor Model (FFM) of personality, and its association with emotional control and distress. In total 498 university students (mean age 28.9 ± 8.4 years) completed the Type D scale (DS14), and measurements for the FFM of personality, emotional control, anxiety, depression and stress. The construct validity of the Icelandic DS14 was confirmed. The Type D components negative affectivity and social inhibition were strongly associated with neuroticism and extraversion of the FFM (r = 0.82 and r = −0.67, respectively). Negative affectivity also correlated with rehearsal/rumination (r = 0.58) and social inhibition with emotional inhibition (r = 0.54), indicative of emotional control. Type D personality (40% of sample) was associated with higher levels of anxiety, depression and stress. The Type D personality components were associated with the FFM of personality, emotional control and emotional distress. Importantly, social and emotional inhibition were closely related, providing novel information about the presence of emotional inhibition within the social inhibition trait. 相似文献
83.
This study investigated whether overgeneral autobiographical memory (OGM) predicts the course of symptoms of depression and anxiety in a community sample, after 5, 6, 12 and 18 months. Participants (N = 156) completed the Autobiographical Memory Test and the Depression Anxiety Stress Scales-21 (DASS-21) at baseline and were subsequently reassessed using the DASS-21 at four time points over a period of 18 months. Using latent growth curve modelling, we found that OGM was associated with a linear increase in depression. We were unable to detect changes over time in anxiety. OGM may be an important marker to identify people at risk for depression in the future, but more research is needed with anxiety. 相似文献
84.
The axiom of choice ensures precisely that, in ZFC, every set is projective: that is, a projective object in the category of sets. In constructive ZF (CZF) the existence of enough projective sets has been discussed as an additional axiom taken from the interpretation of CZF in Martin-Löf’s intuitionistic type theory. On the other hand, every non-empty set is injective in classical ZF, which argument fails to work in CZF. The aim of this paper is to shed some light on the problem whether there are (enough) injective sets in CZF. We show that no two element set is injective unless the law of excluded middle is admitted for negated formulas, and that the axiom of power set is required for proving that “there are strongly enough injective sets”. The latter notion is abstracted from the singleton embedding into the power set, which ensures enough injectives both in every topos and in IZF. We further show that it is consistent with CZF to assume that the only injective sets are the singletons. In particular, assuming the consistency of CZF one cannot prove in CZF that there are enough injective sets. As a complement we revisit the duality between injective and projective sets from the point of view of intuitionistic type theory. 相似文献
85.
86.
Marloes Kleinjan Regina J. J. M. van den Eijnden Jan van Leeuwe Johannes Brug Monique O. M. van de Ven Rutger C. M. E. Engels 《Psychology & health》2013,28(6):729-743
The present study addresses the applicability of the Transtheoretical Model's processes of change in explaining adolescents’ readiness to quit smoking. Furthermore, the association between nicotine dependence and readiness to quit was assessed both directly, as well as indirectly through the processes of change. A cross-sectional survey was conducted, identifying 1547 weekly smokers aged 14–18 years. Structural equation modelling showed that the processes of change were only marginally associated with readiness to quit. Adding nicotine dependence to the model showed a direct association between nicotine dependence and readiness to quit. Only one process of change, self-liberation (i.e. choice/commitment to change and belief in the ability to change), was found to mediate this association. Nicotine dependence appeared to be highly important in adolescents’ readiness to quit. 相似文献
87.
R. Otten M.O.M. Van de Ven R.C.M.E. Engels R.J.J.M. Van den Eijnden 《Psychology & health》2013,28(3):287-300
This prospective population-based study aimed to compare associations between depressive feelings and smoking behaviour of adolescents with and without asthma. Data were collected from a two-wave 22–24 months prospective study among 5938 adolescents who completed self-report questionnaires. Logistic regression analyses showed that depressive feelings and smoking were related both cross-sectionally and longitudinally. Smoking behaviour was similar for adolescents with and without asthma, as well as its correlation with depressive feelings. However, participants with asthma were more likely to report depressive feelings than those without asthma, implying an indirect relationship between asthma and smoking behaviour. Implications for prevention are addressed. 相似文献
88.
Representing the spatial appearance of objects and scenes in drawings is a difficult task for young children in particular. In the present study, the relationship between spatial drawing and cognitive flexibility was investigated. Seven- to 11-year-olds (N = 60) were asked to copy a three-dimensional model in a drawing. The use of depth cues as an indicator of spatial drawing was examined. Furthermore, cognitive flexibility was assessed by three measures: the Wisconsin Card-Sorting Test 64 (reactive flexibility), the Five-Point Test (spontaneous flexibility), and omission/inclusion (representational flexibility). The results revealed significant relationships between all measures of flexibility and the depth cues in children's drawings. However, only spontaneous and representational flexibility turned out to be significant predictors of the spatial drawing score. The results are discussed in light of the specific requirements of spatial representations in drawings. 相似文献
89.
Wim Van den Noortgate José Antonio López-López Fulgencio Marín-Martínez Julio Sánchez-Meca 《Behavior research methods》2013,45(2):576-594
Although dependence in effect sizes is ubiquitous, commonly used meta-analytic methods assume independent effect sizes. We describe and illustrate three-level extensions of a mixed effects meta-analytic model that accounts for various sources of dependence within and across studies, because multilevel extensions of meta-analytic models still are not well known. We also present a three-level model for the common case where, within studies, multiple effect sizes are calculated using the same sample. Whereas this approach is relatively simple and does not require imputing values for the unknown sampling covariances, it has hardly been used, and its performance has not been empirically investigated. Therefore, we set up a simulation study, showing that also in this situation, a three-level approach yields valid results: Estimates of the treatment effects and the corresponding standard errors are unbiased. 相似文献
90.
Lorenza S. Colzato Wery P. M. van den Wildenberg Bernhard Hommel 《Psychonomic bulletin & review》2013,20(5):1011-1016
Increasing evidence suggests that people may cognitively represent themselves and others just like any other, nonsocial event. Here, we provide evidence that the degree of self–other integration (as reflected by the joint Simon effect; JSE) is systematically affected by the control characteristics of temporally overlapping but unrelated and nonsocial creativity tasks. In particular, the JSE was found to be larger in the context of a divergent-thinking task (alternate uses task) than in the context of a convergent-thinking task (remote association task). This suggests that self–other integration and action corepresentation are controlled by domain-general cognitive-control parameters that regulate the integrativeness (strong vs. weak top-down control and a resulting narrow vs. broad attentional focus) of information processing irrespective of its social implications. 相似文献