Comparison of Different Unidimensional-CAT Algorithms Measuring Students’ Language Abilities: Post-hoc Simulation Study
Table 1:
| İtem Selection | TerminationRules | Number Of İtemsadministered | RMSD(theta) | SEM OfCAT Theta | Reliability |
| UW-FI | Precision (0.30) | 17.7 | 0.983 | 0.301 | 0,946 |
| Precision (0.20) | 25.65 | 0.207 | 0.215 | 0.941 | |
| Fixed ( 30) | 30 | 0.862 | 0.247 | 0,962 | |
| LW-FI | Precision(.30) | 16.18 | 0.950 | 0.292 | 0,946 |
| Precision (.20) | 24.97 | 0.213 | 0.215 | 0.943 | |
| Fixed | 30 | 0.180 | 0.201 | 0,945 | |
| PW-FI | Precision (.30) | 15.16 | 0.824 | 0.289 | 0,934 |
| Precision (.20) | 24.99 | 0.21 | 0.216 | 0,939 | |
| Fixed | 30 | 0.668 | 0.227 | 0,958 | |
| FP-KL | Precision (.30) | 17.90 | 0.268 | 0.251 | 0,921 |
| Precision (.20) | 26.46 | 0.220 | 0,220 | 0,932 | |
| Fixed | 30 | 0.707 | 0.233 | 0,943 | |
| VP-KL | Precision (.30) | 13.64 | 0.316 | 0.280 | 0,900 |
| Precision (.20) | 24.9 | 0.218 | 0.216 | 0.942 | |
| Fixed | 30 | 0.182 | 0.202 | 0,946 | |
| FI-KL | Precision (.30) | 18.20 | 0.781 | 0.300 | 0,926 |
| Precision (.20) | 25.65 | 0.198 | 0.216 | 0.94 | |
| Fixed | 30 | 0.628 | 0.247 | 0,945 | |
| VI-KL | Precision .30) | 16.53 | 1.004 | 0.298 | 0,949 |
| Precision (.20) | 26.96 | 0.935 | 0.252 | 0.967 | |
| Fixed | 30 | 0.184 | 0.203 | 0,943 |