Table A1.
Rasch model (IRT) discrimination (β) and difficulty (α) values SGHS items in each sample.
| SGHS Item | VIC | NZ | DEV | |||
|---|---|---|---|---|---|---|
| β (θ) | α | β (θ) | α | β (θ) | α | |
| Spend | 1.74 | −0.60 | 1.57 | −0.58 | 2.14 | 1.01 |
| Savings | 1.34 | −0.31 | 1.51 | 0.14 | 2.69 | 1.13 |
| Recreation | 1.64 | 0.01 | 1.23 | 0.13 | 1.82 | 1.46 |
| Regret | 1.74 | 0.01 | 1.69 | 0.27 | 1.96 | 1.62 |
| Shame | 1.59 | 0.06 | 1.86 | 0.43 | 2.45 | 1.41 |
| Items | 0.87 † | 1.79 | 1.32 | 1.60 | 1.70 | 2.22 |
| Credit Card | 0.75 † | 1.12 | 1.05 | 1.39 | 2.04 | 1.77 |
| Time | 1.12 | 0.40 | 1.68 | 0.61 | 2.54 | 1.56 |
| Distress | 1.78 | 0.30 | 2.48 | 0.64 | 3.25 | 1.47 |
| Failure | 1.13 | 0.65 | 1.54 | 1.06 | 2.65 | 1.56 |
† below discrimination threshold (>1).