HO-GDINA模型的EM算法参数估计

Generalized DINA Model(G-DINA)为认知诊断模型提供了一个一般性的理论框架,而高阶诊断模型不仅能描述被试的总体水平,还能描述被试对属性的掌握情况(微观的认知状态)以及被试掌握属性与能力的关系,提供更丰富的信息。如果能把这两者结合起来,可能对实际诊断工作的操作有较大帮助。文章首先对考虑高阶结构的整合性模型——HO-GDINA模型的形式进行讨论,探讨其参数估计EM算法的实现,并用模拟过程对模型的估计精度进行研究,结果验证了HO-GDINA的EM算法的正确性,并且说明该算法对该模型有较高估计精确度。然后用饱和模型在约束条件下的特殊形式HO-DINA模型对"分数减法"这一经典数据进行EM算法参数估计和具体分析,展示了HO-GDINA在实际情况中的具体使用,并与de la Torre之前用MCMC估计算法得到的研究结果做比较,基本一致,进一步表明HO-GDINA模型的参数估计EM算法在实际情境中的特殊形式下仍然适用。     

母亲元情绪理念与学前儿童社会适应的相互作用关系

采用追踪设计对438名学前儿童母亲进行问卷调查研究,主要探讨了母亲元情绪理念与学前儿童社会适应的相互作用关系。交叉滞后分析结果表明：（1）相邻两次测量的母亲各元情绪理念之间,社会适应各指标之间均具有中等程度的稳定性;（2）同一时间点的母亲各元情绪理念与儿童社会适应各指标之间均显著相关;（3）母亲元情绪理念与儿童社会适应之间部分存在着相互作用关系：控制了变量自身的连续性后,前测的母亲情绪教导显著正向预测后测的儿童敏感合作;前测的母亲情绪不干涉显著正向预测后测的儿童愤怒攻击、焦虑退缩行为;反过来,前测的儿童敏感合作能正向预测后测的母亲情绪教导,显著负向预测情绪不干涉、情绪摒除和情绪紊乱;前测的焦虑退缩能显著正向预测后测的母亲情绪摒除和情绪紊乱。     

Introduction to the Special Theme on Analytic Philosophy

Since the last decades of the 20th century,analytic philosophy has been undermined by many philosophers in many ways.Some have claimed that analytic philosophy effectively ended with Quine's attack on empiricist dogmas,moving in an alternative direction.Others have insisted that it endures,taking a specific approach to philosophical problems inspired by prior speculation.Still others have criticized it based on recent developments in such fields as neuroscience and computer science.Clearly,the present status and the nature of analytic philosophy has been disputed.Several international conferences have recently been held in China to reflect upon,and respond to,these controversies.     

诚信与医德建设

医疗行业的信用危机是职业道德建设中的突出问题.诚信是职业道德建设的灵魂.诚实守信是医务人员必须遵守的基本准则.信息公开和建立诚信档案是促进医德建设的有效途径.     

骨折治疗方法与原则的最优化历程

多年来骨折治疗,新旧技术、新旧理论相互融合,相互碰撞,产生了新的理论和方法,使得临床疗效显著提高,现阶段理智的临床医生应该融汇各家之长,多方互补,对每一位骨折患者的治疗都应该按照最优化的原则进行.但是在医疗过程中总存在着如方法选择不当或者错误,过度治疗,医患信任危机,医疗伦理道德的丧失等情况,我们应该用矛盾分析的方法来思考这些问题.     

从细胞凋亡看生命的选择

随着医学科学的发展人们逐渐认识到:细胞凋亡是细胞在基因控制下生理性、主动性的死亡方式,对维持整个生命有重要的作用,是生命的自主选择.这一认识改变了人们对死亡的传统理解.死亡不只是生命的终结现象而是伴随着整个生命的始终.细胞凋亡的理论为某些疑难疾病的防治提供了可能.     

现代医学科学和人文精神的统一与临床医生综合素质的培养

运用医学哲学的原理,分析了现代医学模式存在的弊端,阐述了现代医学精神是科学和人文精神的统一,结合临床医生综合素质的培养,指出了现代医学科学和人文精神统一的重要性.     

中医"证"本质研究的无序与有序

中医"证"本质的研究结果呈现弱特异性的.证是宏观概念,既呈现着多态性,又呈现着同态性,无序中包含着有序,有序中亦体现着无序.对于"证"研究中出现的弱特异性的研究结果,应将其看成这一证候的几种不同状态;对不同证候得出的同一研究结果的处理也是如此.具体技术上的处理包括:对研究思路更新;对证候规范化;大范围科研协作.强调了大范围科研协作.     

异基因造血干细胞移植中的哲学思考

异基因造血干细胞移植(Allo-HSCT)是目前治疗恶性血液病及其它疾病的主要手段之一,它具有自然科学的一般规律,也有其独特性,其中闪烁着哲学智慧的光辉,用哲学的思想来指导工作的进行,能促进Allo-HSCT的不断发展和取得更好的疗效.     

Adult credibility assessments of misinformed,deceptive and truthful children

This study compared how adults assess the credibility of children who either: (1) experienced a misleading suggestive interview, (2) were coached to lie or (3) experienced a non‐misleading interview. Preschool children (N = 24) were interviewed about a game they had played. One third of them spontaneously reported the truth, one third lied in response to coaching and one third spontaneously reported misinformation from a prior misleading suggestive interview. One hundred and twenty‐nine college students watched videotaped interviews of these children describing their alleged play activities and assessed their credibility. Children who had experienced misleading suggestive questioning were rated as less credible than those who were telling the truth and those who were lying. Adults could accurately detect truth‐telling children above chance, whereas accuracy was below chance detecting both lying children and children who had been misinformed. Adults were most confident of their ratings of truth‐telling children. Copyright © 2009 John Wiley & Sons, Ltd.