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   2219篇
  免费   321篇
  国内免费   795篇
  2024年   4篇
  2023年   36篇
  2022年   79篇
  2021年   95篇
  2020年   116篇
  2019年   94篇
  2018年   131篇
  2017年   107篇
  2016年   122篇
  2015年   89篇
  2014年   109篇
  2013年   213篇
  2012年   210篇
  2011年   209篇
  2010年   183篇
  2009年   194篇
  2008年   179篇
  2007年   250篇
  2006年   211篇
  2005年   168篇
  2004年   101篇
  2003年   81篇
  2002年   52篇
  2001年   36篇
  2000年   32篇
  1999年   31篇
  1998年   14篇
  1997年   12篇
  1996年   15篇
  1995年   15篇
  1994年   18篇
  1993年   11篇
  1992年   11篇
  1991年   9篇
  1990年   8篇
  1989年   11篇
  1988年   6篇
  1987年   11篇
  1986年   5篇
  1985年   14篇
  1984年   9篇
  1983年   3篇
  1982年   7篇
  1981年   10篇
  1980年   4篇
  1979年   4篇
  1975年   3篇
  1972年   1篇
  1964年   1篇
  1959年   1篇
排序方式: 共有3335条查询结果,搜索用时 15 毫秒
941.
The individual self, relational self, and collective self are important and meaningful aspects of identity. However, they plausibly differ in their relative importance such that one self lies closer to the motivational core of the self-concept, better represent the “home base” of selfhood, or, simply stated, is motivationally primary. Four multi-method studies tested the relative motivational-primacy of the selves. Despite their disparate methods, the studies yielded consistent evidence of a three-tiered hierarchy with the individual self at the top, followed by the relational self, and trailed at the bottom by the collective self. The same hierarchy emerged in the Eastern culture of China and the Western cultures of the US and UK. Such pancultural consistency suggests that the motivational hierarchy is a fundamental pattern of the human self.  相似文献   
942.
We tested two competing hypotheses-relative social position and community resources-in regards to their effect on two co-occurring health problems (depression, and obesity) in a sample of smokers participating in an online smoking cessation intervention. Income and education data at the zip code level from the 2000 Census was linked with individual level data. Logistic regression models were used for each co-occurring problem to determine how each SES variable (individually and interactively) was associated with the presence of co-occurring health problems. We found that lower individual education was related to poorer health for all outcomes (Depression: OR = 1.25; Obesity: OR = 1.24; Both: OR = 1.46), lower community education was only related to obesity (OR = 1.20). Lower individual income was related to higher rates of depressive symptoms (OR = 1.64) and both health problems (OR = 1.55); a significant interaction of individual and community income (Wald = 6.13, p < .05) revealed that high income individuals were less likely to be depressed if they lived in lower-income communities and became more likely to be so as community income increased. Relative social position was confirmed for depression, whereas community resources were prominent only for obesity. Higher individual education most consistently predicted positive health outcomes, making it a potentially powerful target to reduce health disparities.  相似文献   
943.
Concern for the impact of prenatal cocaine exposure (PCE) on human language development is based on observations of impaired performance on assessments of language skills in these children relative to non-exposed children. We investigated the effects of PCE on speech processing ability using event-related potentials (ERPs) among a sample of adolescents followed prospectively since birth. This study presents findings regarding cortical functioning in 107 prenatally cocaine-exposed (PCE) and 46 non-drug-exposed (NDE) 13-year-old adolescents.PCE and NDE groups differed in processing of auditorily presented non-words at very early sensory/phonemic processing components (N1/P2), in somewhat higher-level phonological processing components (N2), and in late high-level linguistic/memory components (P600).These findings suggest that children with PCE have atypical neural responses to spoken language stimuli during low-level phonological processing and at a later stage of processing of spoken stimuli.  相似文献   
944.
This article presents a randomized clinical trial examining the effectiveness of a unique model of integrated care for the treatment of infant colic. Families seeking help for infant colic were randomized to either the family‐centered treatment (TX; n = 31) or standard pediatric care (SC; n = 31). All parents completed 3 days of Infant Behavior Diaries (Barr et al., 1998) and the Colic Symptom Checklist (Lester, 1997 ), Beck Depression Inventory (Beck & Steer, 1984 ), and Parenting Stress Index 3rd ed.‐SF (Abidin, 1995 ). TX families were seen three times by a pediatrician and a mental health clinician within 1, 2, and 6 weeks of baseline data. TX families received individualized treatment plans addressing problem areas of sleep, feeding, routine, and family mental health. SC families were seen only by their own healthcare provider. All families were visited at home by a research assistant to retrieve data at 2, 6, and 10 weeks after baseline. Family‐based treatment accelerated the rate of reduction of infant crying faster than did standard pediatric care. Infants in the TX group had more hours of sleep at 2 weeks posttreatment and spent less time feeding at 2, 6, and 10 weeks posttreatment than did SC infants. Results indicate that individualized family‐based treatment reduces infant colic more rapidly than does standard pediatric care.  相似文献   
945.
We characterize, by easily verifiable properties, abstract ternary relations isomorphic to the causal betweenness introduced by Hans Reichenbach.  相似文献   
946.
Drawing on both social exchange theory and impression management theory, this study sought to explain how perception of organizational politics (POP) influences organizational citizenship behaviour (OCB) through two contrary psychological processes. We proposed that through the mediation of job satisfaction, POP has an inhibiting effect on OCB; through the mediation of careerism, POP has a nourishing effect on OCB. Data were obtained from 393 police officers and their colleagues from a city police department in northern Taiwan. Results from structural equation modelling (SEM) revealed that the relationship between POP and OCB was negatively mediated by job satisfaction and positively mediated by careerism. Such antithetical psychological processes imply that employees may experience psychological dilemmas over the performance of OCB when they perceive their organization as political. Implications for theory and future research are discussed.  相似文献   
947.
Math anxiety is a negative emotional reaction to situations involving mathematical problem solving. Math anxiety has a detrimental impact on an individual's long-term professional success, but its neurodevelopmental origins are unknown. In a functional MRI study on 7- to 9-year-old children, we showed that math anxiety was associated with hyperactivity in right amygdala regions that are important for processing negative emotions. In addition, we found that math anxiety was associated with reduced activity in posterior parietal and dorsolateral prefrontal cortex regions involved in mathematical reasoning. Multivariate classification analysis revealed distinct multivoxel activity patterns, which were independent of overall activation levels in the right amygdala. Furthermore, effective connectivity between the amygdala and ventromedial prefrontal cortex regions that regulate negative emotions was elevated in children with math anxiety. These effects were specific to math anxiety and unrelated to general anxiety, intelligence, working memory, or reading ability. Our study identified the neural correlates of math anxiety for the first time, and our findings have significant implications for its early identification and treatment.  相似文献   
948.
Children's achievement-related theories have a profound impact on their academic success. Children who adopt entity theories believe that their ability to perform a task is dictated by the amount of natural talent they possess for that task--a belief that has well-documented adverse consequences for their achievement (e.g., lowered persistence, impaired performance). It is thus important to understand what leads children to adopt entity theories. In the experiments reported here, we hypothesized that the mere act of linking success at an unfamiliar, challenging activity to a social group gives rise to entity beliefs that are so powerful as to interfere with children's ability to perform the activity. Two experiments showed that, as predicted, the performance of 4- to 7-year-olds (N = 192) was impaired by exposure to information that associated success in the task at hand with membership in a certain social group (e.g., "boys are good at this game"), regardless of whether the children themselves belonged to that group.  相似文献   
949.
吴彤 《哲学研究》2012,(2):85-92,129
<正>一、导论关于实践的诠释是哲学中的一个深层次问题。实践是人的存在的根本方式,哲学如若对于这种存在的根本方式不能给予关注,它就会脱离人的生命本质,这样的哲学对于人就没有意义。  相似文献   
950.
探讨公立医院公益性的回归是当前社会讨论的一个比较热门的话题,从医院自身层面出发,从文化建设的角度探讨了公立医院回归公益性的具体概况.主要介绍了医院文化建设和公立医院回归公益性的内在联系,以及如何通过物质文化、行为文化、制度文化和精神文化这四个方面的建设来回归公立医院的公益性.  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