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   497篇
  免费   72篇
  国内免费   105篇
  2024年   1篇
  2023年   20篇
  2022年   19篇
  2021年   29篇
  2020年   33篇
  2019年   20篇
  2018年   27篇
  2017年   23篇
  2016年   27篇
  2015年   21篇
  2014年   32篇
  2013年   47篇
  2012年   48篇
  2011年   35篇
  2010年   43篇
  2009年   41篇
  2008年   35篇
  2007年   46篇
  2006年   45篇
  2005年   30篇
  2004年   13篇
  2003年   12篇
  2002年   4篇
  2001年   3篇
  2000年   1篇
  1999年   2篇
  1998年   2篇
  1997年   4篇
  1995年   1篇
  1993年   1篇
  1992年   1篇
  1991年   2篇
  1990年   1篇
  1989年   1篇
  1985年   3篇
  1975年   1篇
排序方式: 共有674条查询结果,搜索用时 31 毫秒
181.
Group buying is a relatively new online consumption practice. Consumers negotiate product or service prices with businesses to obtain low prices or an increased number of products. This study investigates factors influencing online group‐buying intention from a conformity perspective. An online survey is used to sample 650 online group buyers in Taiwan. Structural Equation Modelling (SEM) is applied to examine the hypotheses within the theoretical framework. Analytical results indicate that social factors (online recommendations, media recommendations, and personal recommendations) positively affect social influence and online group‐buying intention. Individual factors (compliance and attention‐to‐social‐comparison‐information) positively affect social influence and conformity. Psychological factors (financial risk, performance risk, and social risk) negatively affect online group‐buying intention, and are positively correlated with social influence and conformity. Furthermore, social influence (informational influence and normative influence) are positively correlated with conformity and online group‐buying intention. Social influence and conformity are positively correlated with online group‐buying intention. Finally, implications of analytical findings are discussed.  相似文献   
182.
Cognitive diagnosis models of educational test performance rely on a binary Q‐matrix that specifies the associations between individual test items and the cognitive attributes (skills) required to answer those items correctly. Current methods for fitting cognitive diagnosis models to educational test data and assigning examinees to proficiency classes are based on parametric estimation methods such as expectation maximization (EM) and Markov chain Monte Carlo (MCMC) that frequently encounter difficulties in practical applications. In response to these difficulties, non‐parametric classification techniques (cluster analysis) have been proposed as heuristic alternatives to parametric procedures. These non‐parametric classification techniques first aggregate each examinee's test item scores into a profile of attribute sum scores, which then serve as the basis for clustering examinees into proficiency classes. Like the parametric procedures, the non‐parametric classification techniques require that the Q‐matrix underlying a given test be known. Unfortunately, in practice, the Q‐matrix for most tests is not known and must be estimated to specify the associations between items and attributes, risking a misspecified Q‐matrix that may then result in the incorrect classification of examinees. This paper demonstrates that clustering examinees into proficiency classes based on their item scores rather than on their attribute sum‐score profiles does not require knowledge of the Q‐matrix, and results in a more accurate classification of examinees.  相似文献   
183.
Researchers have begun to explore the problem of mass data breaches, where consumer information is acquired by cybercriminals and sold in open markets on-line. Although studies document the social processes of the market and relationships between buyers and sellers, few have considered the revenues earned from market transactions. This study explored these issues using a sample of threads from 10 Russian language and 3 English language Web forums used to sell stolen data. Estimates were generated on the total number of transactions completed by participants along with the advertised prices for the two most common forms of personal information sold. The findings demonstrated that buyers may earn a range of revenues from the sale of stolen data, although this figure was smaller than the potential profits earned from fraudulent use and identity crimes by data buyers. The implications of this study for cybercrime research and policy are explored in detail.  相似文献   
184.
185.
Using the Brief Situational Confidence Questionnaire, the authors examined the refusal self‐efficacy of 105 Self‐Management and Recovery Training (SMART Recovery) members according to their affiliation length and meeting frequency. Results demonstrated that longer affiliation with SMART Recovery and higher meeting frequency significantly enhanced substance refusal self‐efficacy.  相似文献   
186.
Ecological view of human development calls for an investigation of multiple contexts surrounding children. In South Korea, traditional Confucianism and recent technological advancements serve as influential social and cultural contexts that affect parent–child relations and child development. High levels of parental control and strong emphasis on academic achievement have long been distinctive features of Korean parenting practices, which are attributable to Confucian values. Additionally, Korean children’s mobile phone dependency (MPD) has become a growing concern, as South Korea developed as an IT powerhouse. Combined, these contexts resulted in high parental control of children’s mobile phone use, so that such electronic devices would not hinder learning and achievement. Effects of high parental control on children’s MPD and their school life, however, have yet to be discovered. We hypothesized, that, unlike parents’ intentions, psychological control is more likely to increase MPD and disrupt school life. To examine this research model, we made use of the first and third wave data from Korea Children and Youth Panel Survey. Participants were 2378 children (52.2 % boys) of the same age of 10 in the first wave. After multiple imputation for missing values, hierarchical logistic regression followed to examine the mediational model. The results verified the hypothesized model, showing significant adverse influence of psychological control on MPD, self-regulated learning and school adjustment. MPD fully mediated the effect of psychological control on self-regulations, while partially mediating the effects on school adjustment. Implications for Korean parents with regard to supporting children’s psychological autonomy was discussed.  相似文献   
187.
Conditional multi‐item promotions are a prevalent marketing tactic whereby consumers have to buy a certain number of products to get a discount. This paper examines how framing a multi‐item promotion in terms of savings on multiple items versus a single item (e.g., “buy two, get X% off on both” vs. “buy two, get 2X% off on the cheaper item”) affects consumers’ decision‐making and product choices. Two laboratory studies and a field study at a boutique clothing store demonstrate that the “2X% on cheaper” framing makes consumers more likely to select similarly priced primary and secondary items. This strategy is driven by increased focus on promotional savings under the “2X% on cheaper” framing, which leads consumers to spend more on their secondary items. Overall, this research shows how a subtle change in the framing of multi‐item promotions changes consumers’ product selection strategies and shopping basket composition.  相似文献   
188.
4项实验探讨了共同经历相同负性情绪事件,相比单独经历负性情绪事件,是否以及如何促进了个体间的合作。实验1~3分别采用抽奖任务和瑞文推理测验任务操纵负性情绪事件,采用公共物品博弈任务测量合作行为,结果表明,共同经历相同负性情绪事件,相比单独经历负性情绪事件,促进了个体间的合作行为。实验2通过测量归属需要、社会联结和内群体认同,实验3通过操纵归属需要,来考察共同经历相同负性情绪事件促进合作行为的潜在机制,结果表明,共同经历者之间的合作行为受归属需要的驱动,而社会联结和内群体认同不足以对该现象进行解释。实验4通过操纵个体共同经历“相同”和“不同”的负性情绪事件,进一步厘清了,促进个体间的合作是由于“共同经历相同的负性情绪事件”而非“共同经历负性情绪”造成的。研究结果有利于解释小群体的形成,对群体和社会管理亦具有借鉴意义。  相似文献   
189.
青少年罹患抑郁的社会因素受到研究者们的密切关注,尤其是社会支持因素。本文首先总结了社会支持与青少年抑郁关系的内在机制,包括主效应机制和缓冲效应机制;其次论述了影响社会支持与青少年抑郁关系的多种因素,主要涉及来自于社会支持提供者、社会支持接受者和测量方法等方面的因素。社会支持提供者因素包括性别、数量和社会地位;社会支持接受者因素包括性别、年龄、个体内在特征、人格特征以及遗传;此外方法主要涉及社会支持与抑郁症的测量。最后提出了未来的研究方向,如测量方法的改进、元分析纵向研究的开展、线上支持的研究,为青少年抑郁的社会干预提供更多的研究视角。  相似文献   
190.
This study examined pinyin (the official phonetic system that transcribes the lexical tones and pronunciation of Chinese characters) invented spelling and English invented spelling in 72 Mandarin-speaking 6th graders who learned English as their second language. The pinyin invented spelling task measured segmental-level awareness including syllable and phoneme awareness, and suprasegmental-level awareness including lexical tones and tone sandhi in Chinese Mandarin. The English invented spelling task manipulated segmental-level awareness including syllable awareness and phoneme awareness, and suprasegmental-level awareness including word stress. This pinyin task outperformed a traditional phonological awareness task that only measured segmental-level awareness and may have optimal utility to measure unique phonological and linguistic features in Chinese reading. The pinyin invented spelling uniquely explained variance in Chinese conventional spelling and word reading in both languages. The English invented spelling uniquely explained variance in conventional spelling and word reading in both languages. Our findings appear to support the role of phonological activation in Chinese reading. Our experimental linguistic manipulations altered the phonological awareness item difficulties.  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