Table 1 Separation and reliability statistics
From: A Rasch-based validation of the Vietnamese version of the Listening Vocabulary Levels Test
Total | Count | Measure | Realse | IMNSQ | ZSTD | OMNSQ | ZSTD | |
|---|---|---|---|---|---|---|---|---|
Person | 311 Input | 311 Measured | Infit | Outfit | ||||
Mean | 93.1 | 150.0 | .88 | .22 | 1.00 | − .1 | 1.02 | .0 |
P. SD | 23.0 | .1 | 1.07 | .03 | .18 | 1.7 | .55 | 1.5 |
Real RMSE | .23 | True SD | 1.04 | Separation | 4.61 | Person reliability | .96 | |
Item | 150 Input | 150 Measured | Infit | Outfit | ||||
Mean | 192.9 | 311.0 | − .04 | .19 | 1.00 | .0 | 1.02 | .0 |
P. SD | 77.7 | .2 | 1.80 | .17 | .11 | 1.8 | .31 | 1.8 |
Real RMSE | .25 | True SD | 1.78 | Separation | 7.01 | Item reliability | .98 | |