Table 1.

Data colletion methods and topics

Specific objective	Data collection method	Topics covered by interview/observation guide	Data source	Time frame
Participants’ motivation and expectations	Individual semi-structured interview (n = 16)	(1) motivation for participation, (2) expectations, (3) prior training experience	Study participants	Baseline (prior to randomisation)
Interaction within the intervention (group dynamic, norms)	Participant observation (8 sessions × 1.5 h)	(1) participants entering and exiting the room, (2) information to participants from instructors, (3) informal conversations, (4) non-verbal expressions (i.e. facial expressions and bodily movements), (5) physical surroundings (i.e. room, light, temperature)	Intervention group and instructors	During intervention (week 0–8)
Instructors’ experiences of their role and responsibilities	Focus group discussion (n = 4)	(1) expectations and prior coaching experience, (2) experience with the programme; (3) roles and authority, (4) advice for future instructors for patients with FEP	Instructors	After intervention (after 8 weeks)
Participants’ evaluation of the intervention	Focus group discussion (n = 3)	(1) advantages and disadvantages, (2) social norms and social cohesion, (3) relation to and role of instructors, (4) suggestions for improvement of the intervention	Intervention group	After intervention (after 8 weeks)
Possible impact and change in subjective wellbeing	Individual semi-structured interview (n = 9)	(1) the programme in general (positive and negative experiences), (2) social aspect of the training, (3) body and mind, (4) impact on symptoms and daily life	Intervention group	After intervention after 8 weeks)