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   755篇
  免费   97篇
  国内免费   35篇
  2024年   1篇
  2023年   23篇
  2022年   18篇
  2021年   48篇
  2020年   39篇
  2019年   53篇
  2018年   52篇
  2017年   57篇
  2016年   56篇
  2015年   27篇
  2014年   29篇
  2013年   148篇
  2012年   22篇
  2011年   25篇
  2010年   18篇
  2009年   28篇
  2008年   43篇
  2007年   34篇
  2006年   21篇
  2005年   20篇
  2004年   25篇
  2003年   17篇
  2002年   13篇
  2001年   5篇
  2000年   10篇
  1999年   3篇
  1998年   14篇
  1997年   7篇
  1996年   8篇
  1995年   6篇
  1993年   1篇
  1992年   4篇
  1991年   2篇
  1990年   3篇
  1989年   2篇
  1985年   2篇
  1980年   1篇
  1977年   1篇
  1976年   1篇
排序方式: 共有887条查询结果,搜索用时 31 毫秒
191.
Background: Religious and spiritual beliefs and practices are common among medical inpatients, and may impact length of hospital stay (LOS) and other health services (HSU) during hospitalization. Methods: 812 consecutively admitted patients age 50 or over to Duke University Medical Center were assessed. Measures of religiousness and spirituality included religious TV/radio (RTV), self-rated religiousness (SRR), observer-rated spirituality (ORS), and daily spiritual experiences (DSE). The primary outcome was LOS. Results: RTV and SRR predicted longer LOS, whereas ORS and DSE predicted shorter LOS (p 0.05). Effects of RTV onLOS were stronger among women, but explained by worse health status. The effects of DSE on LOS were stronger among non-whites. Among those reporting high DSE, diagnostic tests and total procedures also tended to be less common. Conclusions: Religious activities, attitudes, and spiritual experiences are weak predictors of LOS and HSU during hospitalization. Whether the prediction is positive or negative depends on the religious or spiritual characteristic.  相似文献   
192.
We investigated the behavioural and cognitive development of a captive male infant chimpanzee, Ayumu, raised by his mother, Ai. Here we report Ayumu's achievements up to the age of 2 years and 3 months, in the context of complex computer-controlled tasks. From soon after birth, Ayumu had been present during an experiment performed by his mother. The task consisted of two phases, a matching-to-sample task in which she received token rewards, and the insertion of these tokens into a vending machine to obtain food rewards. Ayumu himself received no reward or encouragement from humans for any of the actions he exhibited during the experiment. At the age of 9 months and 3 weeks, Ayumu performed his first matching-to-sample trial. At around 1 year and 3 months, he began to perform them consistently. Also during this period, he frequently stole food rewards from his mother. At 2 years and 3 months, Ayumu succeeded for the first time in inserting a token into the vending machine. Once he had succeeded in using a token, he performed both phases of the task in sequence 20 times consecutively. The infant's behaviour was not shaped by food rewards but by a strong motivation to copy his mother's behaviour. Our observations of Ayumu thus mirror the learning processes shown by wild chimpanzees.  相似文献   
193.
This study examines previous explanations of democratic peace in light of sociocultural factors and foreign policy actions that influence public perceptions of another country. Two experiments assessed the effects of relevant sociocultural and foreign policy action cues on perception of the regime type of a target nation and on public approval of the use of force. The findings suggest that sociocultural cues affect regime perception. Moreover, perceived similarity of a target nation and foreign policy actions are significant determinants of the public approval of the use of force in addition to perceptions of regime type.  相似文献   
194.
Three models of adolescent substance use, the deviance-prone, affect-regulation, and normative development models, were assessed regarding their ability to predict the substance use of a high-risk homeless adolescent sample with high rates of deviance, depression, and substance use. Hierarchical multiple regression analyses that included tests for curvilinear and gender interaction effects were performed. Results supported the deviance-prone model most strongly, with delinquency but not aggressive behavior predicting substance use. The affect-regulation model received support for females but not for males. With respect to the normative development model, results did not indicate that moderate substance users were better off than abstainers in terms of negative affect or interpersonal relationships.  相似文献   
195.
The present report accomplishes three goals. First, to provide an empirical rationale for placing parental monitoring of children's adaptations as a key construct in development and prevention research. Second, to stimulate more research on parental monitoring and provide an integrative framework for various research traditions as well as developmental periods of interest. Third, to discuss current methodological issues that are developmentally and culturally sensitive and based on sound measurement. Possible intervention and prevention strategies that specifically target parental monitoring are discussed.  相似文献   
196.
Employment for mothers with school-age children has generated great concern regarding its possible harmful effects on adolescents and their families. We examined the influence of maternal employment on the risk-taking behavior of adolescents in two-parent families. Three hundred and eighty-nine high school students completed a 48-item survey in which they indicated their mother's and father's employment patterns, and their own risk-taking behaviors (e.g., substance use, driving while under the influence). Results showed no significant effects of maternal employment on adolescent risk-taking behaviors.  相似文献   
197.
无手机恐惧是一种由手机不在身边或无法使用手机所诱发的情境性焦虑。近年来,大量研究证实了无手机恐惧的普遍存在。相关理论从错失恐惧、手机依恋和自我扩展等视角解释了无手机恐惧发生的原因。综述以往的实证研究发现,无手机恐惧的发生会受到个体特征(人口学变量、人格特质等)和手机使用行为等多方面因素的影响;同时,无手机恐惧会对个体的认知与学业表现、问题性手机使用行为、压力感、心理健康、生活方式和睡眠等多方面产生消极影响。未来研究应厘清和完善无手机恐惧的结构与测量工具,拓展无手机恐惧的研究方法与手段,进一步探讨无手机恐惧的影响因素、后效及作用机制,并加强对无手机恐惧的干预研究。  相似文献   
198.
While smartphones have brought many benefits and conveniences to users, there is continuing debate regarding their potential negative consequences on everyday cognition such as daily cognitive failures. A few cross-sectional studies have found positive associations between smartphone use and cognitive failures. However, several research gaps remain, such as the use of cross-sectional designs, confounds related to stable individual differences, the lack of validity in self-report measures of smartphone use, memory biases in retrospective self-reports, and the lack of differentiation between smartphone checking and smartphone screen time. To simultaneously address the aforementioned shortcomings, the current study examined the within-person associations between various objective indicators of smartphone use and daily cognitive failures using a 7-day daily diary study. Multilevel modelling revealed that smartphone checking, but not total smartphone screen time, predicted a greater occurrence of daily cognitive failures at the within-person level. Surprisingly, we also found negative within-person associations between smartphone screen time for social- and tools-related applications and daily cognitive failures, suggesting that some types of smartphone use may temporarily benefit one's cognitive functioning. This finding demonstrates the importance of studying the specific functions of smartphone use and their differential cognitive consequences, as well as highlights the complex relations between smartphone use and cognition.  相似文献   
199.
In this study, 4516 adolescents (aged 11–16 years) completed a questionnaire examining the relationship between underage National Lottery gambling, underage scratchcard gambling, cigarette smoking, drinking alcohol and drug use. It was found that these behaviours were closely linked. Adolescent gamblers reported that they were significantly more likely to drink alcohol (particularly ‘alcopops’), smoke tobacco and take drugs compared to non-gamblers. © 1998 John Wiley & Sons, Ltd.  相似文献   
200.
表面概貌对原理运用的影响的实验研究   总被引:15,自引:2,他引:13  
莫雷  唐雪峰 《心理学报》2000,32(4):399-408
探讨样例与作业问题的表面概貌相似性对原理运用的影响作用。实验1扩大了Ross的研究材料中样例与测题表面概貌方面的差异程度,探讨两者的表面概貌相似性对原理运用的影响。实验2探讨样例与测题在表面概貌的事件类型方面发生改变的条件下,两者的表面概貌相似性对原理运用的影响。实验3探讨在样例与测题表面概貌有两个级别差异的条件下,两者的表面概貌相似性对原理运用的影响。3个实验均采用被试内设计,要求被试学习原理及样例后完成与样例的表面概貌有不同相似关系的测题。结果表明:(1)样例与问题的表面概貌对原理运用有影响,当两者表面概貌发生较大的变化尤其是在表面概貌的事件类型方面发生变化时,其表面概貌相似性对原理运用的影响就会明显地表现出来;(2)样例与问题的表面概貌对原理运用的影响作用,受到两者对象对应性质的制约,当对象对应相似时,其表面概貌相似就会促进解答测题时运用原理,而当两者的对象对应相反时,其表面概貌相似就会对原理运用产生干扰作用。据此可以认为,样例与作业问题表面概貌的相似性,不仅会影响原理的通达,而且也会影响原理的运用。Ross关于表面概貌相似与否不影响原理运用的结论应该予以修正。  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