Table A1.
Interview topics covered in 2016 and 2017 interviews.
| Interview Focus and Specific Topics | Method and Prompts | |
|---|---|---|
| Needs assessment | Part 1: Participant profile and background information (about 5 min) Brief discussion about past and current smoking and quitting history Prior use of any digital programs (e.g., apps, devices) Any experience with CO monitors and testing in the past |
Open-ended questions + verbal prompts No visual materials or prompts |
| Part 2: Assessment of needs and expectations for CO testing (about 10 min) Interest in CO testing? Why? Interested to use CO Smartphone System? Why? Expectations/general views on CSS Expectations towards CO monitor and associated apps Desired functionality/features of CO monitor and associated apps Expectations for CSS use (When?/Where?/How?/Why?) Readiness to share results (With whom? How?) Reminders (Email, Push notifications, Text) Expectations for information/advice (topic, location, timing of delivery) |
Open-ended questions + verbal prompts No visual materials or prompts |
|
| Demonstration | Part 3: Views and reactions to personal CO monitor General views on iCOTM Smokerlyzer® Designs/looks Size Features and functionality Battery life (about 200 tests or 3 years) Suggestions for improvement |
Open-ended questions + verbal prompts Visual prompts used: iCOTM Smokerlyzer® No app shown |
| User testing of apps or functioning app prototypes | Part 4A (only in 2016): Views on, and reactions to, available apps or app prototypes developed to work with a personal CO monitor (about 15 min). Overall impressions (Likes and Dislikes) Whether would like to use it (when? where? how often?) User journey through the app Journey to complete CO testing Displaying CO results history Other content, information and advice Other issues (language, terminology, amount of texts) Views on ease of use How to improve? Discussion of additional suggestions and possible features (e.g., sharing results, using reminders, setting targets, scheduling testing, etc.) |
Usability tests (exploring the apps naturally, navigating the different content and features) + think-aloud procedure Visual prompts used: Smokerlyzer® app by Bedfont® CO Monitor App prototypes (V1–V2) and designs developed for UCL |
| Part 4B: (only in 2017): Usability testing of CO Monitor app (V3) developed for UCL and discussion of piloting use of iCOTM Smokerlyzer® and CO Monitor App V3 at home Specific prompts as in 4A above |
Usability testing and think-aloud. Visual prompts used: CO Monitor app (V3) developed for UCL |