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   4850篇
  免费   2270篇
  国内免费   59篇
  2024年   4篇
  2023年   22篇
  2022年   25篇
  2021年   183篇
  2020年   212篇
  2019年   633篇
  2018年   533篇
  2017年   643篇
  2016年   592篇
  2015年   557篇
  2014年   481篇
  2013年   705篇
  2012年   323篇
  2011年   306篇
  2010年   230篇
  2009年   227篇
  2008年   239篇
  2007年   228篇
  2006年   215篇
  2005年   169篇
  2004年   107篇
  2003年   134篇
  2002年   94篇
  2001年   106篇
  2000年   74篇
  1999年   45篇
  1998年   17篇
  1997年   9篇
  1996年   9篇
  1995年   8篇
  1994年   4篇
  1993年   7篇
  1992年   5篇
  1991年   3篇
  1990年   2篇
  1989年   1篇
  1988年   2篇
  1987年   2篇
  1985年   4篇
  1984年   1篇
  1982年   2篇
  1981年   3篇
  1980年   2篇
  1979年   1篇
  1978年   2篇
  1977年   5篇
  1976年   1篇
  1975年   2篇
排序方式: 共有7179条查询结果,搜索用时 140 毫秒
51.
ObjectiveThe lack of clear results in previous studies for this context makes us consider an exploratory study. The objective of this research is to examine the influence of certain perinatal factors on the development of premature infants over their first 36 months of life.MethodThe sample consisted of 59 preterm infants born between 25 and 34 weeks of gestational age in an NICU of a third-level hospital. At 36 months of age, the Bayley-III Infant Development Scale (Spanish adaptation) and a clinical history were collected.ResultsThe average scores on the Bayley-III Infant Development Scale were generally within the normal range, but significantly lower than normal for Fine Motor Function, Gross Motor Function, and Expressive Language. These differences remained when considering the degree of prematurity, gender, and perinatal complications. Infants who received mechanical ventilation, oxygen therapy or corticosteroid treatment due to bronchopulmonary dysplasia showed the greatest discrepancies from normal levels.ConclusionOur results support prior studies that show that a combination of perinatal risk factors constitutes the largest determinant for developmental issues at 36 months of age. This information establishes the need for a priority follow-up in this population beyond 24 months of corrected age.  相似文献   
52.
价值观是人们区分好坏、善恶、美丑、损益、是非的信念系统,通常是充满情感的。价值观具有稳定性与可变性的特点。价值观的稳定性表现为:基本价值观具有跨时间的稳定性和跨情境的一致性; 特别是保护性价值观和人生价值观具有较强的稳定性。个人的发展、经历重大事件以及实验干预可导致价值观的改变,可变性主要表现为价值观的重要性发生变化。从我国的实际出发,探讨个人的核心价值观问题、以及价值观研究中国化、价值观研究对价值观教育的启示,乃是我们今后研究的关注点。  相似文献   
53.
In this article, we (1) discuss the reasons why pre‐registration is a good idea, both for the field and individual researchers, (2) respond to arguments against pre‐registration, (3) describe how to best write and review a pre‐registration, and (4) comment on pre‐registration’s rapidly accelerating popularity. Along the way, we describe the (big) problem that pre‐registration can solve (i.e., false positives caused by p‐hacking), while also offering viable solutions to the problems that pre‐registration cannot solve (e.g., hidden confounds or fraud). Pre‐registration does not guarantee that every published finding will be true, but without it you can safely bet that many more will be false. It is time for our field to embrace pre‐registration, while taking steps to ensure that it is done right.  相似文献   
54.
Drawing on Calder, Brendl, Tybout, and Sternthal’s (2021) discussion of constructs and variables, I suggest that the verification approach’s focus on variables fosters a plethora of disconnected “effects” and a dearth of integrative theorizing in consumer behavior research. I discuss how publication practices and incentive structures are likely to contribute to these phenomena.  相似文献   
55.
56.
Accurate analysis of data is vital to the validation of interventions. As such, there has been a recent increase in studies evaluating visual analysis training procedures. However, past investigations have not evaluated direct and indirect visual analysis training methods with matched instructional content that was systematically designed. Furthermore, training has rarely included assessment of generalization and maintenance of visual analysis skills. The purpose of the current dissertation study was to compare the effectiveness and efficiency of (a) computer‐based training, (b) lecture formats with and (c) without the opportunity to pause, and (d) a no‐training group to teach visual analysis of AB graphs to university students. To make these formats directly comparable, the instructional content was equated by ensuring information and examples were identical across the three training procedures. Eighty‐three students were randomly assigned to one of the four groups. Results showed that all three training formats produced increases in accurate responding compared to the no‐training group. Visual analysis skills generalized to novel graphs and maintained approximately 2 weeks following all trainings. These results suggest that structured approaches that are carefully designed to train visual analysis are effective and lead to gains that generalize and maintain in the absence of training.  相似文献   
57.
Individuals with a behaviorally inhibited (BI) temperament are more likely to develop social anxiety. However, the mechanisms by which socially anxious behavior emerges from BI are unclear. Variation in different forms of top‐down control, specifically executive functions (EF), may play distinct roles and characterize differential pathways to social anxiety. Here 291 children were assessed for BI in toddlerhood (ages 2 and 3), parent‐reported inhibitory control and set shifting during middle childhood (age 7), and multidimensional assessment of socially anxious behavior completed during late childhood and early adolescence (ages 9 and 12). Structural equation modeling revealed that early variation in BI predicted the development of socially anxious behavior through either higher levels of parent‐reported inhibitory control or lower levels of parent‐reported set shifting. These data reinforce the notion that top‐down control does not uniformly influence relations between temperament and socially anxious behavior. These data suggest novel approaches to thinking about the role of EFs and social anxiety outcomes as children approach adolescence.  相似文献   
58.
From the very first moments of their lives, infants selectively attend to the visible orofacial movements of their social partners and apply their exquisite speech perception skills to the service of lexical learning. Here we explore how early bilingual experience modulates children's ability to use visible speech as they form new lexical representations. Using a cross‐modal word‐learning task, bilingual children aged 30 months were tested on their ability to learn new lexical mappings in either the auditory or the visual modality. Lexical recognition was assessed either in the same modality as the one used at learning (‘same modality’ condition: auditory test after auditory learning, visual test after visual learning) or in the other modality (‘cross‐modality’ condition: visual test after auditory learning, auditory test after visual learning). The results revealed that like their monolingual peers, bilingual children successfully learn new words in either the auditory or the visual modality and show cross‐modal recognition of words following auditory learning. Interestingly, as opposed to monolinguals, they also demonstrate cross‐modal recognition of words upon visual learning. Collectively, these findings indicate a bilingual edge in visual word learning, expressed in the capacity to form a recoverable cross‐modal representation of visually learned words.  相似文献   
59.
We reconcile competing theories of the role of phonological memory in reading development, by uncovering their dynamic relationship during the first 5 years of school. Phonological memory, reading and phoneme awareness were assessed in 780 phonics‐educated children at age 4, 5, 6 and 9. Confirmatory factor analyses demonstrated that phonological memory loaded onto two factors: verbal short‐term memory (verbal STM; phonological tasks that loaded primarily on serial order memory) and nonword repetition. Using longitudinal structural equation models, we found that verbal STM directly predicted early word‐level reading from age 4 to 6, reflecting the importance of serial‐order memory for letter‐by‐letter decoding. In contrast, reading had no reciprocal influence on the development of verbal STM. The relationship between nonword repetition and reading was bidirectional across the 5 years of study: nonword repetition and reading predicted each other both directly and indirectly (via phoneme awareness). Indirect effects from nonword repetition (and verbal STM) to reading support the view that phonological memory stimulates phonemically detailed representations through repeated encoding of complex verbal stimuli. Similarly, the indirect influence of reading on nonword repetition suggests that improved reading ability promotes the phoneme‐level specificity of phonological representations. Finally, the direct influence from reading to nonword repetition suggests that better readers use orthographic cues to help them remember and repeat new words accurately. A video abstract of this article can be viewed at https://www.youtube.com/watch?v=70LZfTR0BjE .  相似文献   
60.
In this article, I reflect upon my own career to distil some general recommendations for doing high‐impact social psychological research in the midst of a worldwide pandemic. My suggestions include (a) testing and deriving theories that can help explain real‐world human judgment and behaviour (answering questions that people care about), (b) preaching beyond the choir (communicating your research to audiences outside of social psychology), and (c) birds of a feather are stronger together (maximizing impact through strategic collaborations).  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