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Three functional interfaces in each of the two app designs presented to six groups of study participants.
| Group | A | B | C | |
|---|---|---|---|---|
| Control design | 1 | C1C2C3 | C1C2C3 | C1C2C3 |
| Persuasive design | 2 | P1C2C3 | C1P2C3 | C1C2P3 |
The bolded interface (e.g., “P2”) is the interface of interest for the respective groups. The other (unbolded) interfaces were presented alongside the interface of interest so that participants would have an overview of the three key use cases of the COVID Alert app.
