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Table 3 Mean (standard deviation) number of administered items

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

-

25 (13)

12 (6)

7 (3)

6 (2)

5 (2)

29 (17)

15 (9)

9 (5)

7 (3)

5 (3)

MLE

FP-KL

-

25 (13)

12 (6)

7 (3)

6 (2)

5 (2)

29 (17)

15 (9)

9 (5)

7 (3)

6 (3)

BME

UW-FI

Normal

23 (12)

10 (5)

5 (2)

4 (2)

3 (1)

28 (17)

13 (7)

7 (4)

5 (3)

4 (2)

BME

UW-FI

Uniform

25 (13)

12 (6)

7 (3)

6 (3)

5 (2)

29 (17)

15 (9)

9 (5)

7 (4)

6 (3)

BME

FP-KL

Normal

23 (12)

10 (5)

5 (2)

4 (2)

3 (1)

28 (17)

13 (7)

7 (4)

5 (3)

4 (2)

BME

FP-KL

Uniform

25 (13)

12 (6)

7 (3)

6 (3)

5 (2)

29 (17)

15 (9)

9 (5)

7 (4)

6 (3)

EAP

UW-FI

Normal

23 (12)

11 (5)

6 (2)

5 (2)

4 (1)

28 (17)

13 (7)

7 (4)

5 (3)

4 (2)

EAP

UW-FI

Uniform

26 (13)

13 (6)

8 (3)

6 (2)

5 (2)

30 (17)

15 (9)

9 (4)

7 (3)

6 (2)

EAP

FP-KL

Normal

23 (12)

11 (5)

6 (2)

5 (2)

4 (1)

28 (17)

13 (7)

7 (4)

5 (3)

4 (2)

EAP

FP-KL

Uniform

26 (13)

13 (6)

8 (3)

6 (2)

5 (2)

30 (17)

15 (8)

9 (4)

7 (3)

6 (2)