科学不确定性的类型、来源及影响

随着科学认识对象的日益复杂,以及科技和社会的相互影响日益加强,科学认识能力的历史局限性凸显了出来,使得在知识的生产、应用,以及利用知识进行决策的过程中,显示了种种不确知或不知道(not-knowing),这就是科学技术的不确定性。沃克(W.E.W allker)认为,不确定性是“任何对难以达到的完全决定论的偏离”[1]。范·阿塞尔特(M.B.A.Van Asselt)认为,不确定性是“整套的信念或者疑惑,它们来自对过去和现在状况的有限的知识,以及预测未来事件”[2]。不确定性在现代科技中普遍存在,并意味着风险,以至于吉登斯(Anthony G iddens)和贝克(Ulric…     

学校归属感与学生发展的探索研究

采用问卷调查法探讨中小学生的学校归属感与学校适应、自我概念、同伴关系及班级环境的关系。结果表明:1)学校适应、自我概念、同伴关系和班级环境与中小学生的学校归属感有密切的关系;2)学校归属感能有效的预测学生的自我概念;3)师生关系和同伴关系对学校归属感有重要影响,是学校归属感显著的预测变量;4)学校类型对学校归属感有显著的影响,重点中学学生的学校归属感显著高于其他类型学校的学生。     

Children’s Life Satisfaction: Developmental Trajectories and Environmental and Personality Predictors

Life satisfaction is a key indicator of children’s healthy development. Although the developmental changes of life satisfaction during adolescence have been investigated, the developmental trajectories of life satisfaction and related predictors during childhood remain unclear. Thus, the current study aimed to identify the developmental trajectories of life satisfaction covering the period from middle to late childhood as well as to examine the predictive roles of environmental factors (i.e., family dysfunction and basic psychological needs satisfaction at school), personality factors (i.e., neuroticism and extraversion), and their interactions in these developmental trajectories. An accelerated longitudinal design was used with Chinese elementary school students (N?=?1069, 45.8% girls, M _age?=?9.43, SD?=?0.95) of 3 cohorts (grade 3, grade 4, and grade 5) on 4 occasions at 6-month intervals. Growth mixture modeling analyses revealed three distinct trajectories of life satisfaction: “High-Stable” (88.8%), “High-Decreasing” (6.8%), and “Low-Increasing” (4.4%). Multivariate logistic regression analyses revealed that family dysfunction and neuroticism served as risk factors for adverse developmental trajectories of life satisfaction; whereas basic psychological needs satisfaction at school served as a protective factor. Furthermore, the interaction between family dysfunction and extraversion suggested that higher levels of extraversion buffered children against the negative effect of family dysfunction on the development of life satisfaction. The identification of three heterogeneous trajectory groups of children’s life satisfaction and key personality and environmental predictors associated with the trajectories suggests that specific interventions need to be tailored to the unique characteristics of the relevant trajectory groups.

     

Nonstrategic subjective threshold effects in phonemic masking

Three backward-masking experiments demonstrated that the magnitude of the phonemic mask reduction effect (MRE) is a function of subjective threshold and that the magnitude is also independent of stimulus-based response strategies. In all three experiments, a target word (e.g., bake) was backward masked by a graphemically similar nonword (e.g., BAWK), a phonemically similar nonword (e.g., BAIK), or an unrelated control (e.g., CRUG). Experiments 1 and 2 had a low percentage (9%) of trials with phonemic masks and differed only in baseline identification rate. Experiment 3 controlled baseline identification rate at below and above subjective threshold levels, with 9% phonemic trials. The results were that identification rates were higher with phonemic masks than with graphemic masks, irrespective of the low percentage of phonemic trials. However, the magnitude of the phonemic MRE became large only when the baseline identification rate was below subjective threshold. The pattern of the phonemic MRE was interpreted as a result of rapid automatic phonological activation, independent of stimulus-based processing strategies.     

红光照明条件下VDT不同显示色的视觉效果比较

本研究以VDT上持续进行的视觉作业速度和眼的调节辐合时间作为指标,对红光照明条件下VDT显示的红、黄、绿、蓝、白五种字符色的视觉效果进行了比较.实验中,VDT背景光的主波长为630nm.结果表明,五种字符色在两项指标上均表现出显著差异;绿色显示的视觉效果最好,红色显示的效果最差,黄、白、蓝三色处于中间.     

去工业化与人民公社的困境

人民公社承载着组织农村工业化之重任,普遍试办社队工业企业、就地转移劳动力、使农民尽快富裕起来是人民公社工农商学兵、农林牧副渔综合发展的题中之意.然而1962的政策大调整将其去工业化之后,人民公社被归结为一种纯农组织而失去了它应有的功能,并由此开始陷入困境而走向终结.