Skip to main content

Advertisement

Springer Nature is making SARS-CoV-2 and COVID-19 research free. View research | View latest news | Sign up for updates

Table 2 Overall person- and item-fit statistics and reliability analysis of the Qiyas for L1 Arabic language test

From: Investigating the psychometric properties of the Qiyas for L1 Arabic language test using a Rasch measurement framework

Total score Count Measure Model error Mosq Infit ZSTD Mnsq Outfit ZSTD  
Summary of 271 measured persons
Mean 28.3 50.0 0.33 0.33 1.00 0.0 1.02 0.1
SD 8.7 0.0 0.92 0.03 0.13 0.9 0.26 1.1
Max. 46.0 50.0 2.78 0.54 1.43 2.5 2.29 3.4
Min. 9.0 50.0 − 1.75 0.31 0.69 − 2.7 0.51 − 2.6
Real RMSE = 0.34 True SD = 0.85 Separation = 2.48 Person reliability = 0.86
Model RMSE = 0.33 True SD = 85 Separation = 2.55 Person reliability = 0.87
SE of person mean = 0.06
Summary of 50 measured items
Mean 153.1 271.0 0.00 0.14 0.99 0.0 1.02 0.1
SD 46.5 0.0 0.90 0.01 0.10 1.8 0.20 2.0
Max. 229.0 271.0 2.17 0.18 1.26 4.4 1.62 4.5
Min. 46.0 271.0 − 1.63 0.13 0.78 − 4.1 0.72 − 3.7
Real RMSE = 0.15 True SD = 0.89 Separation = 6.10 Item reliability = 0.97
Model RMSE = 0.14 True SD = 0.89 Separation = 6.22 Item reliability = 0.97
SE of item mean = 0.13