Table 1.
Outline of interview questions.
| Domain | Examples of interview questions/prompts |
| Engagement | To start with can you tell me if you used: |
| The app? If YES, did you receive any push notifications or messages from the app? Did you read any of these? Did you click on any of the push notifications? How did you mainly use the app? | |
| The website? Did you receive weekly email with links to the website? Did you ever click on these links? | |
| I wonder if you could tell me a little bit about your experience of using the Growing healthy app/website? | |
| What did you think of the app/website? | |
| When did you use the app/website? | |
| Let’s look at the home page of the app/website together (as a memory prompt for the questions below) | |
| Were there any particular sections that you looked at more than others? Why was that? | |
| What have been the most helpful sections of the app? Can you tell me about a time when you used it and how it helped? | |
| Were there any sections of the app which you didn’t find helpful? Can you tell me more about that? | |
| Behavioral determinants | I would now like to ask you about formula feeding/breastfeeding/mixed feeding and the formula feeding/breastfeeding/mixed feeding section of the app (get them to open it if possible) |
| How helpful was this section of the app/website? Prompts: what did you like? Dislike? | |
| Behavior | In what ways (if any) do you think it changed how you fed your baby? |
| Capability | What new things (if any) did you learn from the app/website about formula feeding/breastfeeding/mixed feeding? |
| Motivation | Did it change the way you felt about formula feeding/breastfeeding/mixed feeding? |
| Opportunity | How well supported overall did you feel in breastfeeding/formula feeding/mixed feeding your baby? To what extent (if any) did the Growing healthy program (app/website/push notification) influence how well supported you felt in breastfeeding/formula feeding/mixed feeding? |
| Opportunity | Did you seek any additional advice or information on formula/breastfeeding/mixed feeding outside of that received on the app/website? What prompted you to seek this advice or information? How did this section of the app (website or the notifications you received) fit with the advice or information you received from elsewhere? How did you deal with any conflicting advice? |
| Do you have any further comments or anything to add about the Growing healthy program and your experience of feeding your baby? |