Known psychometric properties of the questionnaires to be administered at some point during the study
| Measure and validation reference | Items | Scale used | Internal consistency (Cronbach's α) |
|---|---|---|---|
| Tinnitus Functional Index27 | 25 | 1–10 | 0.97 |
| Tinnitus Handicap Inventory—Screening25 | 10 | 1–3 | 0.87 |
| Hearing Handicap Inventory—Screening34 | 10 | 1–3 | 0.93 |
| Insomnia Severity Index36 | 7 | 0–4 | 0.74 |
| Cognitive Failures Questionnaire38 | 25 | 0–4 | 0.89 |
| Hyperacusis Questionnaire41 | 14 | 0–4 | 0.66–0.68 |
| Patient Health Questionnaire42 | 9 | 0–3 | 0.83 |
| Generalised Anxiety Disorder45 | 7 | 0–3 | 0.89 |
| Satisfaction with Life Scales44 | 5 | 1–7 | 0.87 |