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   2288篇
  免费   400篇
  国内免费   129篇
  2817篇
  2024年   37篇
  2023年   42篇
  2022年   51篇
  2021年   92篇
  2020年   114篇
  2019年   81篇
  2018年   91篇
  2017年   94篇
  2016年   96篇
  2015年   73篇
  2014年   81篇
  2013年   163篇
  2012年   111篇
  2011年   167篇
  2010年   132篇
  2009年   153篇
  2008年   180篇
  2007年   212篇
  2006年   202篇
  2005年   171篇
  2004年   93篇
  2003年   74篇
  2002年   41篇
  2001年   23篇
  2000年   29篇
  1999年   30篇
  1998年   27篇
  1997年   21篇
  1996年   22篇
  1995年   12篇
  1994年   8篇
  1993年   14篇
  1992年   10篇
  1991年   4篇
  1990年   6篇
  1989年   4篇
  1988年   3篇
  1987年   2篇
  1985年   7篇
  1984年   6篇
  1983年   6篇
  1982年   9篇
  1981年   6篇
  1980年   4篇
  1979年   3篇
  1973年   1篇
  1972年   1篇
  1971年   2篇
  1968年   2篇
  1966年   3篇
排序方式: 共有2817条查询结果,搜索用时 15 毫秒
861.
    
We investigated the role of inhibition failure in Obsessive Compulsive Disorder (OCD) through an eye tracking experiment. Twenty-five subjects with OCD were recruited, as well as 25 with Generalized Anxiety Disorder (GAD) and 25 healthy controls. A 3 (group: OCD group, GAD group and control group) × 2 (target eccentricity: far and near) × 2 (saccade task: prosaccade and antisaccade) mixed design was used, with all participants completing two sets of tasks involving both prosaccade (eye movement towards a target) and antisaccade (eye movement away from a target). The main outcome was the eye movement index, including the saccade latency (the time interval from the onset of the target screen to the first saccade) and the error rate of saccade direction. The antisaccade latency and antisaccade error rates for OCDs were much higher than those for GADs and healthy controls. OCDs had longer latency and error rates for antisaccades than for prosaccades, and for far-eccentricity rather than near-eccentricity stimuli. These results suggest that OCDs experience difficulty with behavior inhibition, and that they have higher visual sensitivity to peripheral stimuli. In particular, they show greatest difficulty in inhibiting behavior directed towards peripheral stimuli.  相似文献   
862.
Promises are among the most widely used tools for increasing trust in social hierarchies; yet the effect of social status on trust in promises is unknown. Here we used a modified version of the Trust Game, in which participants, acting as Investors, were paired with Trustees of varying social status who were given the opportunity to promise (or not) to return at least half of the multiplied amount (i.e., 4 × the amount invested). No return feedback was provided. Participants invested more in partners who promised than those who did not or whose promise information was concealed. Importantly, in both lab-manipulated (Exps. 1–3: math-induced) and pre-existing (Exp. 4: university-based) hierarchies, participants invested more in promises given by high status than low status partners. Post-experiment measures suggest that this may be due to greater expectations of honesty for high status than low status others. Potential explanations and implications are discussed.  相似文献   
863.
    
Personalized learning refers to instruction in which the pace of learning and the instructional approach are optimized for the needs of each learner. With the latest advances in information technology and data science, personalized learning is becoming possible for anyone with a personal computer, supported by a data-driven recommendation system that automatically schedules the learning sequence. The engine of such a recommendation system is a recommendation strategy that, based on data from other learners and the performance of the current learner, recommends suitable learning materials to optimize certain learning outcomes. A powerful engine achieves a balance between making the best possible recommendations based on the current knowledge and exploring new learning trajectories that may potentially pay off. Building such an engine is a challenging task. We formulate this problem within the Markov decision framework and propose a reinforcement learning approach to solving the problem.  相似文献   
864.
    
The goal of this study was to test the mediating effect of social decision making in the relations of anger and anger control to externalising and internalising problems. A sample of 174 Chinese adolescents (mean age = 15.36 years) completed self‐reports of trait anger, anger control, externalising problems, internalising problems and social decision making, which was operationalized as situational judgement reflecting an individual's ability to interact effectively with parents, teachers and peers. Findings indicated that adolescents' trait anger and anger control were positively related to both externalising and internalising problems. In addition, path analysis revealed that social decision making mediated the relationship between trait anger, anger control and externalising problems. Findings on the mediating effect will be discussed by referencing appraisal tendency theory and response evaluation and decision.  相似文献   
865.
866.
    
Altered structural connectivity has been identified as a possible biomarker of autism spectrum disorder (ASD) risk in the developing brain. Core features of ASD include impaired social communication and early language delay. Thus, examining white matter tracts associated with language may lend further insight into early signs of ASD risk and the mechanisms that underlie language impairments associated with the disorder. Evidence of altered structural connectivity has previously been detected in 6‐month‐old infants at high familial risk for developing ASD. However, as language processing begins in utero, differences in structural connectivity between language regions may be present in the early infant brain shortly after birth. Here we investigated key white matter pathways of the dorsal language network in 6‐week‐old infants at high (HR) and low (LR) risk for ASD to identify atypicalities in structural connectivity that may predict altered developmental trajectories prior to overt language delays and the onset of ASD symptomatology. Compared to HR infants, LR infants showed higher fractional anisotropy (FA) in the left superior longitudinal fasciculus (SLF); in contrast, in the right SLF, HR infants showed higher FA than LR infants. Additionally, HR infants showed more rightward lateralization of the SLF. Across both groups, measures of FA and lateralization of these pathways at 6 weeks of age were related to later language development at 18 months of age as well as ASD symptomatology at 36 months of age. These findings indicate that early differences in the structure of language pathways may provide an early predictor of future language development and ASD risk.  相似文献   
867.
    
This short paper has two parts. First, we prove a generalisation of Aumann's surprising impossibility result in the context of rational decision making. We then move, in the second part, to discuss the interpretational meaning of some formal setups of epistemic models, and we do so by means of presenting an interesting puzzle in epistemic logic. The aim is to highlight certain problematic aspects of these epistemic systems concerning first/third‐person asymmetry which underlies both parts of the story. This asymmetry, we argue, reveals certain limits of what epistemic models can be.  相似文献   
868.
    
This paper compares the multilevel modelling (MLM) approach and the person‐specific (PS) modelling approach in examining autoregressive (AR) relations with intensive longitudinal data. Two simulation studies are conducted to examine the influences of sample heterogeneity, time series length, sample size, and distribution of individual level AR coefficients on the accuracy of AR estimates, both at the population level and at the individual level. It is found that MLM generally outperforms the PS approach under two conditions: when the sample has a homogeneous AR pattern, namely, when all individuals in the sample are characterized by AR processes with the same order; and when the sample has heterogeneous AR patterns, but a multilevel model with a sufficiently high order (i.e., an order equal to or higher than the maximum order of individual AR patterns in the sample) is fitted and successfully converges. If a lower‐order multilevel model is chosen for heterogeneous samples, the higher‐order lagged effects are misrepresented, resulting in bias at the population level and larger prediction errors at the individual level. In these cases, the PS approach is preferable, given sufficient measurement occasions ( 50). In addition, sample size and distribution of individual level AR coefficients do not have a large impact on the results. Implications of these findings on model selection and research design are discussed.  相似文献   
869.
    
We attempt to make sense of ongoing gender disparities in the upper ranks of organizations by examining gender bias in leaders’ assessments of managers’ derailment potential. In a large managerial sample (Study 1: N ~ 12,500), we found that ineffective interpersonal behaviors were slightly less frequent among female managers but slightly more damaging to women than men when present. Evidence of bias was not found in performance evaluations but emerged when leaders were asked about derailment potential in the future. We replicated this pattern of effects in a second large managerial sample (Study 2: N ~ 35,500) and in two experimental studies (Studies 3 and 4) in which gender and interpersonal behaviors were manipulated. In Study 4, we also showed that when supervisors believe that a manager might derail in the future, they tend to withdraw mentoring support and sponsorship, which are especially critical for women's career advancement. Our research highlights the importance of leaders’ perceptions of derailment potential—which differ from evaluations of performance or promotability—both because they appear to be subject to stereotype‐based gender bias and because they have important implications for the mentoring and sponsorship that male and female managers receive.  相似文献   
870.
    
This study explores the effects of intergroup exclusion on need‐threat and the behavioral tendencies of excluded individuals. Results show that those excluded by in‐group members perceived more threat to relational needs, while participants excluded by out‐group members perceived more threat to efficacy needs. In addition, participants excluded by out‐group members displayed significantly more aggression intention and less helping intention than those who were excluded by in‐group members. This study indicates that the group relationship between excluders and the excluded will directly affect threat perception and behavioral responses.  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