| Questions with less than 20% correct (floor) | Adolescents (age 15–17 years; n=107) | Young adults (age 18–19 years; n=36) | Parents (n=92) |
| Mode of group selection | 19.8 | N/A | 17.4† |
| Study benefits | 16.8 | 16.7 | 19.6† |
| Research purpose (open)‡ | 1.1 | 13.3 | 1.1 |
| Study duration (open)‡ | 13.1 | N/A | 9.8 |
| What is next after HIV test results (open)‡ | 14.0 | N/A | N/A |
| Study HIV test versus clinic HCT (open)‡ | 7.7 | 0 | 2.2 |
| Study risks (open)‡ | 9.3 | N/A | 13.0 |
| Whom to call (open)‡ | 10.5 | 19.4 | 19.6† |
| Study eligibility (open)‡ | N/A | N/A | 7.7 |
*Per cent only shown if ceiling/floor cut-off met.
↵†Parents who consented without staff present would not have met criterion for ceiling; parents who consented with staff would not meet criterion for floor.
‡(open) denotes open-ended questions, (response range=0–4). These were dichotomised for floor/ceiling analysis: 0=0–1, 1=2–4.
N/A, less than 80% of the sample (by population) got these items correct (upper panel) or incorrect (lower panel).
HCT, HIV Counselling and Testing.