针对现有试卷质量评价理论依据不充分、分析指标标准不一,科学性差的特点,结合CTT(classical test theory)真分数不变性、误差安全性及IRT(item response theory)参数不变性、线性等值等优点,提出了一个基于CTT和IRT的试卷质量评价系统...针对现有试卷质量评价理论依据不充分、分析指标标准不一,科学性差的特点,结合CTT(classical test theory)真分数不变性、误差安全性及IRT(item response theory)参数不变性、线性等值等优点,提出了一个基于CTT和IRT的试卷质量评价系统的建设思路,并完成系统实现。以某大学五门课程试卷及考生成绩为例,进行了试卷分析和试题分析,分析结果显示,IRT得到的学生能力更贴近实际情况,正确反映了学生能力在该考试中的位置,通过分析结果说明考试排名与学生的客观能力的符合程度,并给出该次考试试卷的改进建议。展开更多
Risk management in Botswana has been very ineffective at assisting projects to be on time, on budget, and meeting client＇s/buyer＇s expectations. Traditional risk management attempts to manage, control, and direct a ...Risk management in Botswana has been very ineffective at assisting projects to be on time, on budget, and meeting client＇s/buyer＇s expectations. Traditional risk management attempts to manage, control, and direct a project through various phases, from planning and design, through procurement, and to construction. However, the risk management in Botswana seems to be either not implemented or not successful. The project performance in Botswana has a poor performance record. The researchers are attempting to identify why the traditional project/risk management is not working. In analyzing the problem in Botswana, the researchers discovered that the traditional risk management model was theoretically unsound, and designed a new project and risk model, with an entirely different approach to risk. The new model is an outgrowth of the highly successful Performance Information Procurement System （PIPS） and the Information Measurement Theory （IMT）/Kashiwagi Solution Model （KSM） concepts. The approach has been presented to some Botswana clients and academics and has received a favorable response. The development of the new risk model will lead to a huge change in the paradigm for delivering projects in Botswana. The theoretical development of the new risk model is ongoing at the University of Botswana as a part of a doctoral dissertation.展开更多
文摘针对现有试卷质量评价理论依据不充分、分析指标标准不一,科学性差的特点,结合CTT(classical test theory)真分数不变性、误差安全性及IRT(item response theory)参数不变性、线性等值等优点,提出了一个基于CTT和IRT的试卷质量评价系统的建设思路,并完成系统实现。以某大学五门课程试卷及考生成绩为例,进行了试卷分析和试题分析,分析结果显示,IRT得到的学生能力更贴近实际情况,正确反映了学生能力在该考试中的位置,通过分析结果说明考试排名与学生的客观能力的符合程度,并给出该次考试试卷的改进建议。
文摘Risk management in Botswana has been very ineffective at assisting projects to be on time, on budget, and meeting client＇s/buyer＇s expectations. Traditional risk management attempts to manage, control, and direct a project through various phases, from planning and design, through procurement, and to construction. However, the risk management in Botswana seems to be either not implemented or not successful. The project performance in Botswana has a poor performance record. The researchers are attempting to identify why the traditional project/risk management is not working. In analyzing the problem in Botswana, the researchers discovered that the traditional risk management model was theoretically unsound, and designed a new project and risk model, with an entirely different approach to risk. The new model is an outgrowth of the highly successful Performance Information Procurement System （PIPS） and the Information Measurement Theory （IMT）/Kashiwagi Solution Model （KSM） concepts. The approach has been presented to some Botswana clients and academics and has received a favorable response. The development of the new risk model will lead to a huge change in the paradigm for delivering projects in Botswana. The theoretical development of the new risk model is ongoing at the University of Botswana as a part of a doctoral dissertation.
