项目教学法在传感器课程改革中的应用

本文针对传统《传感器技术及应用》课程教学中存在的不足,结合目前企业的实际需要,对课程进行了一些有益的探索和尝试;采用"项目教学法"的教学模式,将课程全部放在实验室进行,并对学生量身定制了"实验周"开展教学;本文通过实例介绍了项目教学法在传感器课程教学中的具体应用。     

“马尔可夫链蒙特卡洛”(MCMC)方法在估计IRT模型参数中的应用

本文介绍和阐述怎样运用“马尔可夫链蒙特卡洛”(MCMC)技术,并结合Bayes方法来估计IRT的模型参数。首先简要地概述了MCMC方法估计模型参数的基本原理;其次介绍MCMC方法估计模型参数的一般方法,涉及Gibbs抽样、取舍抽样、Metropolis-Hastings算法等概念和方法;最后以IRT的“二参数逻辑斯蒂”(2PL)模型为例,重点介绍了用“Gibbs范围内的M-H算法”估计项目参数(β1jβ2j)的算法过程。结束本文时还解说了MCMC方法的特点。阅读本文需具有随机过程、Markov链、Bayes方法等概率论的基本知识。     

谈教育考试国家题库建设

本文主要从题库的起源及国内外题库建设现状,教育考试国家题库建设的必要性和迫切性,以及教育考试国家题库建设的目标、内容和步骤三大方面对题库建设进行了讨论。     

基于项目反应理论的临床医学考试系统的实现技术

对利用现代科技手段实现临床医学教学活动中学生临床能力的评价做了一些尝试,介绍项目反应理论原理,探讨自适应测验系统中所需要运用的理论,并给出在临床医学学科实际运用时的数学模型及考试设计流程,对存在的具体问题提出自己的设计思路和解决方案。     

A new approach to test score equating using item response theory with fixed C-parameters

Because parameter estimates from different calibration runs under the IRT model are linearly related, a linear equation can convert IRT parameter estimates onto another scale metric without changing the probability of a correct response (Kolen & Brennan, 1995, 2004). This study was designed to explore a new approach to finding a linear equation by fixing C-parameters for anchor items in IRT equating. A rationale for fixing C-parameters for anchor items in IRT equating can be established from the fact that the C-parameters are not affected by any linear transformation. This new approach can avoid the difficulty in getting accurate C-parameters for anchor items embedded in the application of the IRT model. Based upon our findings in this study, we would recommend using the new approach to fix C-parameters for anchor items in IRT equating. This work was supported by a Korea Research Foundation Grant funded by the Korean Government (MOEHRD, Basic Research     

Answer changing in testing situations: the role of metacognition in deciding which answers to review

The purpose of our study was to examine the issue of answer changing in relation to students’ abilities to monitor their behaviour accurately while responding to multiple-choice tests. The data for this study were obtained from the final examination administered to students in an educational psychology course. The results of the study indicate that decision making regarding answer changing can be informed by metacognitive monitoring when a student's attention is drawn to cues solicited during testing. However, answer changing can be a “tricky” test-taking strategy, and how it relates to test performance is based on an interplay of variables both at a person level as well as at a task level. This is probably why this strategy is frequently misunderstood by both test-takers and educators.     

高等教育自学考试复本试卷的设计及其平行性控制

复本试卷的平行,是确保自学考试标准稳定的重要手段。影响试卷平行的因素包括试卷结构、知识内容、难度分布、认知层次的构成等,它们从不同维度上共同构成了平行试卷的指标控制体系。在命题和题库建设中,通常使用命题细目表和知识内容赋分比例表作为控制试卷平行的手段。     

题库建设中的试题沉积问题及其应对策略分析

试题沉积是题库建设必须面对和解决的问题。造成这种现象的原因多种多样,如试题入库把关不严、难度不合组卷要求、新旧题型发生变化、试题已经老化过时以及库存试题分布不均,等等。针对这些原因,本文逐一提出解决办法,如强化教师培训、严格入库标准、题型翻新改造、控制试题难度以及提高命题工作的前瞻性,等等。通过这些措施,努力减少试题沉积,提高入库试题使用率,实现题库建设的又好又快发展。     

浅谈高频电子技术收音机项目式教学

本文结合高频电子技术课程教学改革实践——按教学工厂形式,用具体项目取代传统验证性实验。针对应用型本科学生特点,结合了高频电子线路这门课程,开展了以收音机为实验内容,通过收音机的各部分原理的学习,收音机的安装、调试和维修的整体项目来验证和学习相关的高频电子技术各章知识点。最后以教和学的视角分别对本次教学经验进行总结。