Table 1.

Iterative and participatory user research and design of ecological momentary assessment system.

Phase	Research method	Duration	Stakeholders/users, n
Phase 1: Exploratory ideation	Focus group with stakeholders; 1-1 design session with users	60 min; 4560 min	6 stakeholders; 5 users
Phase 2: In-lab evaluation	Scenario-based think-aloud usability evaluation	4560 min	6 users
Phase 3: Field Trial 1	User evaluation of ecological momentary assessment (EMA) system in the field (feasibility test)	4 weeks	21 users
Phase 4: Field Trial 2	Response rate comparison of 2 versions of EMA system	4 weeks	38 users