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Table 1 Estimated GRM parameters of the items of the MASQ-AD (N = 3597).

From: A proof of principle for using adaptive testing in routine Outcome Monitoring: the efficiency of the Mood and Anxiety Symptoms Questionnaire -Anhedonic Depression CAT

Nr. (MASQ Nr.)

Item

Item Parameter Estimates

  

a

b 1

b 2

b 3

b 4

1 (1)

Felt cheerful (+)

2.41

-2.50

-1.08

-0.08

0.78

2 (14)

Felt really happy (+)

2.61

-2.52

-1.44

-0.57

0.18

3 (18)

Felt optimistic (+)

2.37

-2.74

-1.47

-0.60

0.40

4 (21)

Felt really bored (-)

0.98

-0.40

0.81

1.86

3.58

5 (23)

Felt like I was having a lot of fun (+)

2.75

-2.77

-1.51

-0.69

0.08

6 (26)

Felt withdrawn from other people (-)

1.18

-0.46

0.74

1.44

2.81

7 (27)

Seemed to move quickly and easily (+)

1.41

-3.05

-1.33

-0.26

0.68

8 (30)

Looked forward to things with enjoyment (+)

2.55

-2.11

-0.98

-0.25

0.61

9 (33)

Felt like nothing was very enjoyable (-)

2.08

-0.59

0.26

0.80

1.77

10 (35)

Felt like I had accomplished a lot (+)

1.74

-3.49

-2.03

-1.07

-0.20

11 (36)

Felt like I had a lot of interesting things to do (+)

1.94

-3.34

-1.86

-0.98

-0.17

12 (39)

Felt like it took extra effort to get started (-)

1.08

-1.72

-0.40

0.34

1.93

13 (40)

Felt like I had a lot to look forward to (+)

2.21

-2.65

-1.43

-0.62

0.27

14 (44)

Felt like there wasn't anything interesting or fun to do (-)

1.38

-0.72

0.33

1.10

2.39

15 (49)

Was proud of myself (+)

2.06

-2.84

-1.68

-0.77

0.29

16 (53)

Felt unattractive (-)

0.90

-0.68

0.57

1.49

2.65

17 (58)

Felt really "up" or lively (+)

2.90

-2.72

-1.65

-0.81

-0.20

18 (66)

Felt really slowed down (-)

1.15

-0.75

0.51

1.34

2.75

19 (72)

Felt like I had a lot of energy (+)

2.01

-3.00

-1.79

-0.84

-0.14

20 (78)

Felt hopeful about the future (+)

1.96

-2.59

-1.40

-0.53

0.44

21 (86)

Felt really good about myself (+)

2.63

-2.88

-1.57

-0.69

0.22

22 (89)

Thought about death or suicide (-)

1.18

0.86

1.71

2.26

3.34

  1. Note. a is the discrimination parameter; the b's are threshold parameters.
  2. A plus represents a positively and a minus a negatively formulated item; positively formulated items were score-reversed.