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Table 1 Estimated GRM parameters of the items of the MASQ-AD (N = 3597).
| 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| 6 (26) | Felt withdrawn from other people (-) | 1.18 | -0.46 | 0.74 | 1.44 | 2.81 |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 |
