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Table 5 Root mean square errors (RMSE) between CAT estimated θs and true θs

From: An evaluation of computerized adaptive testing for general psychological distress: combining GHQ-12 and Affectometer-2 in an item bank for public mental health research

Theta estimator Item selection Prior SEM threshold θ true  ~ N(0,1) SEM threshold θ true  ~ U(-3,3)
0.25 0.32 0.40 0.45 0.50 0.25 0.32 0.40 0.45 0.50
MLE UW-FI - 0.253 0.318 0.401 0.449 0.489 0.266 0.322 0.402 0.457 0.499
MLE FP-KL - 0.253 0.319 0.401 0.448 0.488 0.266 0.324 0.402 0.457 0.497
BME UW-FI Normal 0.251 0.322 0.407 0.453 0.476 0.279 0.355 0.48 0.558 0.619
BME UW-FI Uniform 0.257 0.318 0.401 0.447 0.491 0.266 0.318 0.401 0.451 0.502
BME FP-KL Normal 0.251 0.322 0.406 0.448 0.474 0.279 0.355 0.48 0.555 0.619
BME FP-KL Uniform 0.259 0.318 0.395 0.44 0.484 0.263 0.322 0.396 0.452 0.491
EAP UW-FI Normal 0.247 0.313 0.383 0.429 0.465 0.276 0.345 0.448 0.516 0.575
EAP UW-FI Uniform 0.253 0.315 0.383 0.422 0.462 0.261 0.319 0.39 0.43 0.466
EAP FP-KL Normal 0.247 0.313 0.383 0.427 0.468 0.276 0.346 0.447 0.512 0.585
EAP FP-KL Uniform 0.253 0.315 0.377 0.422 0.463 0.263 0.319 0.385 0.43 0.465