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Comparison of Passing Scores Determined by The Angoff Method in Different Item Samples
International Journal of Assessment Tools in Education ( IF 0.8 ) Pub Date : 2020-03-09 , DOI: 10.21449/ijate.699479
Hakan KARA 1 , Sevda ÇETİN 2
Affiliation  

In this study, the efficiency of various random sampling methods to reduce the number of items rated by judges in an Angoff standard-setting study was examined and the methods were compared with each other. Firstly, the full-length test was formed by combining Placement Test 2012 and 2013 mathematics subsets. After then, simple random sampling (SRS), content stratified (C-SRS), item-difficulty stratified (D-SRS) and content-by-difficulty random sampling (CD-SRS) methods were used to constitute different length of subsets (30%, 40%, 50%, 70%) from the full-test. In total, 16 different study conditions (4 methods x 4 subsets) were investigated. In data analysis part, ANOVA analysis was conducted to examine whether minimum passing scores (MPSs) for the subsets were significantly different from the MPSs of the full-length test. As a follow-up analysis, RMSE and SEE (Standard Error of Estimation) values were calculated for each study condition. Results indicated that the estimated Angoff MPSs were significantly different from the full-test Angoff MPS (45.12) only in the study conditions of 30%-C-SRS, 40% C-SRS, 30% D-SRS and 30%-CD-SRS. According to RMSE values, the C-SRS method had the smallest error while the SRS method had the biggest one. Moreover, SEE examinations revealed that to achieve estimations similar to the full-test Angoff MPS (within one SEE), it is sufficient to get 50% of items with the C-SRS method. C-SRS method was the more effective one compared to the others in reducing the number of items rated by judges in MPS setting studies conducted with the Angoff method.

中文翻译:

Angoff方法确定的不同项目样本的及格分数比较

在这项研究中,研究了各种随机抽样方法在减少Angoff标准制定研究中法官评定的项目数量方面的效率,并将这些方法相互比较。首先,通过结合2012年和2013年数学测验子集形成全长测验。此后,使用简单随机抽样(SRS),内容分层(C-SRS),项目难度分层(D-SRS)和逐项内容随机抽样(CD-SRS)方法来构成不同长度的子集( 30%,40%,50%,70%)。总共研究了16种不同的研究条件(4种方法x 4个子集)。在数据分析部分,进行了方差分析,以检查子集的最低通过分数(MPS)是否与全长测试的MPS显着不同。作为后续分析,针对每种研究条件计算RMSE和SEE(估计的标准误差)值。结果表明,仅在研究条件为30%-C-SRS,40%C-SRS,30%D-SRS和30%-CD-S的研究条件下,估计的Angoff MPS与完全测试的Angoff MPS显着不同(45.12)。 SRS。根据RMSE值,C-SRS方法的误差最小,而SRS方法的误差最大。此外,SEE检查显示,要获得与完整测试的Angoff MPS(一次SEE内)相似的估计,使用C-SRS方法足以获得50%的项目。在减少使用Angoff方法进行的MPS设置研究中法官评判的项目数量方面,C-SRS方法是一种比其他方法更为有效的方法。结果表明,仅在研究条件为30%-C-SRS,40%C-SRS,30%D-SRS和30%-CD-S的研究条件下,估计的Angoff MPS与完全测试的Angoff MPS显着不同(45.12)。 SRS。根据RMSE值,C-SRS方法的误差最小,而SRS方法的误差最大。此外,SEE检查显示,要获得与完整测试的Angoff MPS(一次SEE内)相似的估计,使用C-SRS方法足以获得50%的项目。在减少使用Angoff方法进行的MPS设置研究中法官评判的项目数量方面,C-SRS方法是一种比其他方法更为有效的方法。结果表明,仅在研究条件为30%-C-SRS,40%C-SRS,30%D-SRS和30%-CD-S的研究条件下,估计的Angoff MPS与完全测试的Angoff MPS显着不同(45.12)。 SRS。根据RMSE值,C-SRS方法的误差最小,而SRS方法的误差最大。此外,SEE检查显示,要获得与完整测试的Angoff MPS(一次SEE内)相似的估计,使用C-SRS方法就足以获得50%的项目。在减少使用Angoff方法进行的MPS设置研究中法官评判的项目数量方面,C-SRS方法是一种比其他方法更为有效的方法。C-SRS方法的误差最小,而SRS方法的误差最大。此外,SEE检查显示,要获得与完整测试的Angoff MPS(一次SEE内)相似的估计,使用C-SRS方法足以获得50%的项目。C-SRS方法在减少使用Angoff方法进行的MPS设置研究中法官评定的项目数方面比其他方法更为有效。C-SRS方法的误差最小,而SRS方法的误差最大。此外,SEE检查显示,要获得与完整测试的Angoff MPS(一次SEE内)相似的估计,使用C-SRS方法足以获得50%的项目。在减少使用Angoff方法进行的MPS设置研究中法官评判的项目数量方面,C-SRS方法是一种比其他方法更为有效的方法。
更新日期:2020-03-09
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