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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6 (26) Felt withdrawn from other people (-) 1.18 -0.46 0.74 1.44 2.81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.