不同基准年级下锚题难度范围与年级离散程度对垂直量尺化的影响  

The Influence of Difficulty Range of Anchor Items and Separation of Grade Distributions on Vertical Scaling Under Different Base Grades

作　　者：黎光明 张晓婷 Li Guangming;Zhang Xiaoting(School of Psychology,Center for Studies of Psychological Application,South China Normal University,Guangzhou 510631)

机构地区：[1]华南师范大学心理学院,心理应用研究中心,广州510631

出　　处：《心理学探新》2023年第1期68-76,共9页Psychological Exploration

基　　金：广东省自然科学基金面上项目(2021A1515012516);广东省普通高校特色创新类项目(哲学社会科学)(粤教科函[2021]7号,2021WTSCX020)。

摘　　要：使用3PLM和蒙特卡洛法生成数据,基于非等组锚题设计,考察不同基准年级下锚题难度范围与年级离散程度对垂直量尺化的影响。结果发现:(1)基准年级的选择会影响垂直量尺化的精度。(2)锚题设计下垂直量尺化的转换不宜超过两个年级。(3)不同基准年级下,年级离散程度越小,估计精度越好。(4)不同基准年级下,对锚题难度范围的选择应有所不同。(5)年级离散程度与锚题难度范围之间存在交互效应。In this study,we used 3PLM under common-item design,and set grade 1 and grade 2 as the base grade respectively.Setting the item parameters of 100 items of four grades and the ability parameters of 1000 subjects in each grade in different combinations of difficulty range of anchor items and the separation of grade distributions,and then simulated the response matrix by Monte Carlo method using BILOG-MG for concurrent calibration.Bias and RMSE values are calculated as accuracy criteria.This study shows that:(1)the choice of the base group affects the results of the vertical scaling.(2)The conversion of vertical scaling under anchor question design should not exceed two grades.(3)Under different base grades,the smaller the separation of grade distribution is,the better the estimation accuracy is.(4)When the base grade is the lower grade,the difficulty range of the anchor items should be wide.When the base grade is middle grade,the difficulty range of the anchor items should be medium to get a better accuracy.(5)There is an interaction between the separation of grade distributions and the difficulty range of the anchor items.

关 键 词：垂直量尺化 基准年级 锚题难度范围 年级离散程度 测验等值 

分 类 号：B841.2[哲学宗教—基础心理学]